CN111870984A - Chemical efficient rectifying tower - Google Patents
Chemical efficient rectifying tower Download PDFInfo
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- CN111870984A CN111870984A CN202010770289.0A CN202010770289A CN111870984A CN 111870984 A CN111870984 A CN 111870984A CN 202010770289 A CN202010770289 A CN 202010770289A CN 111870984 A CN111870984 A CN 111870984A
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- tank
- purifying tank
- rectifying tower
- condenser
- pipe
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- 239000000126 substance Substances 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 13
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 20
- 238000004821 distillation Methods 0.000 abstract description 6
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 7
- 239000012071 phase Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a high-efficiency rectifying tower for chemical engineering, which comprises a support frame, wherein a purifying tank and a collecting tank are arranged on the upper side of the support frame, a condenser and a constant-temperature cold water tank are arranged on the support plate, a liquid filling opening is formed in one side of the purifying tank, a first heat-insulating layer is arranged on the outer side of the purifying tank, a heating device is arranged between the first heat-insulating layer and the purifying tank, a discharge valve is arranged at the bottom of the purifying tank, a purifying device is arranged inside the purifying tank, the upper end of the purifying tank is connected with the condenser through a guide pipe, a valve is arranged on the guide pipe, a cooling pipe is arranged inside the condenser, the upper end and the lower end of the cooling pipe are respectively connected with the constant-temperature cold water tank through a water inlet pipe and a water outlet pipe, the lower end of the. The efficient rectifying tower for the chemical industry has the advantages of simple structure, high cooling efficiency and capability of quickly achieving the purpose of distillation.
Description
Technical Field
The invention relates to the field of chemical industry, in particular to a high-efficiency rectifying tower for chemical industry.
Background
The rectifying tower is a tower type vapor-liquid contact device for rectifying. By utilizing the property that each component in the mixture has different volatility, namely the vapor pressure of each component is different at the same temperature, the light component (low-boiling-point substance) in the liquid phase is transferred into the gas phase, and the heavy component (high-boiling-point substance) in the gas phase is transferred into the liquid phase, thereby realizing the purpose of separation.
The existing rectifying tower is commonly used in a plate type structure, called as a plate type tower, gas-liquid two phases are generally in multiple countercurrent contact, the gas-liquid two phases on each plate are generally used as alternating current, but the efficiency is not high and the distillation efficiency is reduced by the plate type structure cooling.
Disclosure of Invention
The invention aims to provide a chemical efficient rectifying tower which is simple in structure and high in cooling efficiency and can quickly achieve the aim of distillation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-efficiency rectifying tower for chemical industry comprises a supporting frame, wherein a purifying tank and a collecting tank are arranged on the upper side of the supporting frame, a supporting plate is arranged in the middle of the supporting frame, a condenser and a constant-temperature cold water tank are arranged on the supporting plate, a liquid filling opening is formed in one side of the purifying tank, a first heat-insulating layer is arranged on the outer side of the purifying tank, a heating device is arranged between the first heat-insulating layer and the purifying tank, a discharge valve is arranged at the bottom of the purifying tank, a purifying device is arranged inside the purifying tank, the upper end of the purifying tank is connected with the condenser through a guide pipe, a valve is arranged on the guide pipe, a cooling pipe is arranged inside the condenser, the upper end and the lower end of the cooling pipe are respectively connected with the constant-temperature, fine filter screen and smart filter screen, collection tank lower extreme are equipped with the discharge pipe, and the support frame bottom is equipped with the supporting leg.
Further, purifier includes filtering component and adsorbed layer, and filtering component sets up at the adsorbed layer downside.
Furthermore, the filtering component adopts a polytetrafluoroethylene filter element or a stainless steel filter screen, and the adsorption layer is an activated carbon adsorption layer.
Further, the purifier downside of purification tank inboard is equipped with the separation plate, and the separation plate downside is equipped with accepts the board, accepts the board middle part and is equipped with the round hole, is equipped with a plurality of bleeder vents of direction diverse on the separation plate, and the separation plate is conical structure, accepts the conical structure that the board is the fretwork, and purification tank one side is equipped with the drain pipe.
Furthermore, the air holes are different in shape and size.
Furthermore, the inner bottom of the purification tank and the inner bottom of the collection tank are both provided with an inclined block.
Furthermore, the water inlet pipe is sequentially provided with a regulating valve, a cooling water pump and a flowmeter from left to right.
Furthermore, the condenser and the constant-temperature cold water tank are coated with a second heat-insulating layer.
Furthermore, the number of the cooling pipes is 4-6, the cooling pipes are arranged side by side, and the cooling pipes are spirally arranged.
Furthermore, a pressurized steam valve is arranged at the joint of the guide pipe and the purification tank.
The invention has the following beneficial effects: the high-efficiency rectifying tower for the chemical industry has a simple structure and high cooling efficiency, can quickly achieve the aim of distillation, can filter and adsorb a part of particles in steam through the filtering component and the adsorption layer, can efficiently filter moisture in the steam through the separating plate with the air holes in different directions, can also filter a part of impurities in the steam simultaneously, can realize power-on heating by adopting the heating device arranged below the purifying tank, avoids the defect of large occupied space of the existing steam heating mode, is convenient to connect, can be convenient to operate and reload by adopting the electric heating mode, heats chemical liquid in the purifying tank by the heating device, plays a role in heat preservation by the first heat preservation layer, avoids the waste of heat emitted by hot gas in the purifying tank to the outside, pressurizes the steam valve to increase the rising pressure of the steam, and enables the steam to have enough rising pressure, water in the constant-temperature cold water tank is controlled to enter the cooling pipe through the water inlet pipe through the cooling water pump and the regulating valve, so that indirect cooling of steam entering the condenser is realized, impurities and chemical liquid are separated due to liquefaction, the separated chemical liquid drops on the multistage filtering device and enters the bottom of the distillation tank, the flow of the cold water of the water inlet pipe can be controlled by the cooling water pump and the regulating valve, the cold water in the cooling pipe enters the constant-temperature cold water tank through the water outlet pipe, recycling of the cooling water is realized, the constant-temperature cold water tank can convey cold water with constant temperature, the cooling pipe cools the steam in the condenser, impurities and the chemical liquid are separated due to liquefaction, the separated chemical liquid drops on the multistage filtering device, the multistage filtering device filters the chemical impurities, the filtered chemical liquid enters the collecting tank to be collected and discharged through the discharge pipe, and the second heat-insulating layer can prevent the temperature of the cold water in the condenser and the constant-temperature cold water tank from, the cooling effect of the condenser is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the structure of the purification tank of fig. 1.
Wherein: 1. the device comprises a support frame, 2, a purification tank, 3, a collection tank, 4, a condenser, 5, a constant-temperature cold water tank, 6, a liquid filling opening, 7, a first heat preservation layer, 8, a heating device, 9, a discharge valve, 10, a guide pipe, 11, a valve, 12, a water inlet pipe, 13, a water outlet pipe, 14, a guide pipe, 15, a coarse filter screen, 16, a fine filter screen, 17, a fine filter screen, 18, a discharge pipe, 19, support legs, 20, a filter assembly, 21, an adsorption layer, 22, a separation plate, 23, a receiving plate, 24, an inclined block, 25, a regulating valve, 26, a cooling water pump, 27, a flowmeter, 28, a second heat preservation layer, 29, a pressurized steam valve, 30, a support plate, 31, a cooling pipe, 32, a round hole, 3, a vent hole.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in figures 1 and 2, a high-efficiency rectifying tower for chemical industry comprises a support frame 1, wherein a purifying tank 2 and a collecting tank 3 are arranged on the upper side of the support frame 1, a support plate 30 is arranged in the middle of the support frame 1, a condenser 4 and a constant-temperature cold water tank 5 are arranged on the support plate 30, a liquid filling opening 6 is arranged on one side of the purifying tank 2, a first heat-insulating layer 7 is arranged on the outer side of the purifying tank 2, a heating device 8 is arranged between the first heat-insulating layer 7 and the purifying tank 2, a discharge valve 9 is arranged at the bottom of the purifying tank 2, a purifying device is arranged in the purifying tank 2, the upper end of the purifying tank 2 is connected with the condenser 4 through a guide pipe 10, a valve 11 is arranged on the guide pipe 10, a cooling pipe 31 is arranged in the condenser 4, the upper end and the lower end of the cooling pipe 31 are respectively connected with the constant, the multistage filter device comprises a coarse filter screen 15, a fine filter screen 16 and a fine filter screen 17, a discharge pipe 18 is arranged at the lower end of the collecting tank 3, and supporting legs 19 are arranged at the bottom of the supporting frame 1.
The purification device comprises a filter component 20 and an adsorption layer 21, wherein the filter component 20 is arranged on the lower side of the adsorption layer 21.
The filtering component 20 adopts a polytetrafluoroethylene filter element or a stainless steel filter screen, and the adsorption layer 21 is an activated carbon adsorption layer.
2 inboard purifier downside of purifying tank are equipped with separation plate 22, and separation plate 22 downside is equipped with accepts board 23, accepts board 23 middle part and is equipped with round hole 32, is equipped with a plurality of bleeder vents 33 of direction diverse on the separation plate 23, and separation plate 22 is conical structure, accepts board 23 and is the conical structure of fretwork, and purifying tank one side is equipped with the drain pipe.
The air holes 33 are different in shape and size.
The bottom of the inner sides of the purification tank 2 and the collection tank 3 are both provided with an inclined block 24.
The water inlet pipe 12 is provided with a regulating valve 25, a cooling water pump 26 and a flow meter 27 from left to right in sequence.
And a second heat-insulating layer 28 is coated on the outer sides of the condenser 4 and the constant-temperature cold water tank 5.
The number of the cooling pipes 31 is 4-6, the cooling pipes 31 are arranged side by side, and the cooling pipes 31 are spirally arranged.
A pressurized steam valve 29 is arranged at the joint of the conduit 10 and the purification tank 2.
The invention can realize the electric heating by adopting the heating device 8 arranged below the purification tank 2, and avoids the defect that the existing steam heating mode occupies large space, meanwhile, the heating device 8 adopts the electric heating mode, has simple structure, convenient connection and convenient operation and reloading, heats the chemical liquid in the purification tank 2, ensures that the chemical liquid is collided with the separation plate 22 when communicating impurities and volatilize together through the separation plate 22, water is remained on the separation plate 22 and flows onto the bearing plate 23 along with lying down to be discharged through the discharge port 34, the steam and the impurities pass through the air holes 33, filter and adsorb a part of impurities through the filter assembly 20 and the adsorption layer 21, then enter the condenser 4 through the conduit 10, control the water in the constant temperature cold water tank 5 to enter the cooling pipe 31 through the water inlet pipe 12 through the cooling water pump 27 and the regulating valve 26, and indirectly cool the steam entering the condenser 4, impurities and chemical liquid are separated due to liquefaction, the separated chemical liquid drops on the multistage filtering device and enters the bottom of the distillation retort 3, the flow of cold water of the water inlet pipe 12 can be controlled by using the cooling water pump 27 and the regulating valve 26, the cold water in the cooling pipe 31 enters the constant-temperature cold water tank 5 through the water outlet pipe 13, the cyclic utilization of the cooling water is realized, the constant-temperature cold water tank 5 can convey the cold water with constant temperature, the cooling pipe 31 cools steam in the condenser 4, the impurities and the chemical liquid are separated due to liquefaction, the separated chemical liquid drops on the multistage filtering device, the multistage filtering device filters the chemical impurities, and the filtered chemical liquid enters the collecting tank 3 to be collected and is discharged through the discharge pipe 18; the steam valve 29 is pressurized to increase the rising pressure of the steam so that the steam has a sufficient rising pressure.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (10)
1. The utility model provides a chemical industry is with high-efficient rectifying column, includes the support frame, its characterized in that: the support frame upside is equipped with purifying tank and collecting vessel, the support frame middle part is equipped with the backup pad, be equipped with condenser and constant temperature cold water storage cistern in the backup pad, purifying tank one side is equipped with the filling opening, the purifying tank outside is equipped with first heat preservation, be equipped with heating device between first heat preservation and the purifying tank, purifying tank bottom is equipped with discharge valve, the inside purifier that is equipped with of purifying tank, purifying tank upper end is connected with the condenser through the pipe, be equipped with the valve on the pipe, the inside cooling tube that is equipped with of condenser, both ends are connected with the constant temperature cold water storage cistern through inlet tube and outlet pipe respectively about the cooling tube, the condenser lower extreme is connected with the collecting vessel through the contact tube, collecting vessel inboard bottom is equipped with multi-stage filtration device, multi-stage filtration device includes coarse filtration net, fine.
2. The chemical efficient rectifying tower as claimed in claim 1, wherein: purifier includes filtering component and adsorbed layer, and filtering component sets up in the adsorbed layer downside.
3. The chemical efficient rectifying tower as claimed in claim 1, wherein: the filter component adopts a polytetrafluoroethylene filter element or a stainless steel filter screen, and the adsorption layer is an activated carbon adsorption layer.
4. The chemical efficient rectifying tower as claimed in claim 1, wherein: the purifier downside of purifying tank inboard is equipped with the separation plate, and the separation plate downside is equipped with accepts the board, accepts the board middle part and is equipped with the round hole, is equipped with a plurality of bleeder vents of direction diverse on the separation plate, and the separation plate is conical structure, accepts the conical structure that the board is the fretwork, and purifying tank one side is equipped with the drain pipe.
5. The chemical efficient rectifying tower as claimed in claim 4, wherein: the air holes are different in shape and size.
6. The chemical efficient rectifying tower as claimed in claim 1, wherein: the inner bottom of the purification tank and the inner bottom of the collection tank are both provided with an inclined block.
7. The chemical efficient rectifying tower as claimed in claim 1, wherein: and the water inlet pipe is sequentially provided with an adjusting valve, a cooling water pump and a flowmeter from left to right.
8. The chemical efficient rectifying tower as claimed in claim 1, wherein: and a second heat-insulating layer is coated on the outer sides of the condenser and the constant-temperature cold water tank.
9. The chemical efficient rectifying tower as claimed in claim 1, wherein: the number of the cooling pipes is 4-6, the cooling pipes are arranged side by side and are spirally arranged.
10. The chemical efficient rectifying tower as claimed in claim 1, wherein: and a pressurized steam valve is arranged at the joint of the guide pipe and the purification tank.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010770289.0A CN111870984A (en) | 2020-08-04 | 2020-08-04 | Chemical efficient rectifying tower |
Applications Claiming Priority (1)
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CN202010770289.0A CN111870984A (en) | 2020-08-04 | 2020-08-04 | Chemical efficient rectifying tower |
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CN111870984A true CN111870984A (en) | 2020-11-03 |
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CN202010770289.0A Pending CN111870984A (en) | 2020-08-04 | 2020-08-04 | Chemical efficient rectifying tower |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114832465A (en) * | 2022-05-30 | 2022-08-02 | 河南中托力合化学有限公司 | Rectifying column liquid outlet pipe filtering structure capable of improving purity of n-octadecane |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4767503A (en) * | 1983-08-29 | 1988-08-30 | Allied Corporation | Removal of light impurities from caprolactam by distillation with water |
CN207126342U (en) * | 2017-08-10 | 2018-03-23 | 南通苏润环保科技有限公司 | A kind of acid mist Tower for purifying waste gas |
CN207412779U (en) * | 2017-11-08 | 2018-05-29 | 绵阳高新区达高特科技有限公司 | A kind of high-purity liquid chemical preparation rectification and purification device |
CN109277070A (en) * | 2018-10-31 | 2019-01-29 | 江苏国胶化学科技有限公司 | The production technology and its device of different monooctyl ester acrylic acid |
CN111013336A (en) * | 2019-12-17 | 2020-04-17 | 浙江大学 | Double-cone gas collection distribution cover for gas-liquid separation and gas dispersion method |
-
2020
- 2020-08-04 CN CN202010770289.0A patent/CN111870984A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4767503A (en) * | 1983-08-29 | 1988-08-30 | Allied Corporation | Removal of light impurities from caprolactam by distillation with water |
CN207126342U (en) * | 2017-08-10 | 2018-03-23 | 南通苏润环保科技有限公司 | A kind of acid mist Tower for purifying waste gas |
CN207412779U (en) * | 2017-11-08 | 2018-05-29 | 绵阳高新区达高特科技有限公司 | A kind of high-purity liquid chemical preparation rectification and purification device |
CN109277070A (en) * | 2018-10-31 | 2019-01-29 | 江苏国胶化学科技有限公司 | The production technology and its device of different monooctyl ester acrylic acid |
CN111013336A (en) * | 2019-12-17 | 2020-04-17 | 浙江大学 | Double-cone gas collection distribution cover for gas-liquid separation and gas dispersion method |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114832465A (en) * | 2022-05-30 | 2022-08-02 | 河南中托力合化学有限公司 | Rectifying column liquid outlet pipe filtering structure capable of improving purity of n-octadecane |
CN114832465B (en) * | 2022-05-30 | 2023-12-19 | 河南中托力合化学有限公司 | Rectifying column drain pipe filtering structure capable of improving purity of n-octadecane |
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Application publication date: 20201103 |