CN216725835U - Partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation - Google Patents
Partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation Download PDFInfo
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- CN216725835U CN216725835U CN202123159468.XU CN202123159468U CN216725835U CN 216725835 U CN216725835 U CN 216725835U CN 202123159468 U CN202123159468 U CN 202123159468U CN 216725835 U CN216725835 U CN 216725835U
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Abstract
The utility model discloses a baffle type methyl propionate reaction rectifying column of coupling hydrogenation, its characterized in that: the device comprises a tower body, a hydrogenation reactor and a partition board for dividing the space in the tower body into a reaction area and a collection area, wherein the upper part and the bottom of the reaction area of the tower body are respectively provided with an organic acid feed inlet and a methanol feed inlet, the top of the collection area of the tower body is provided with a light component collection port and a light component reflux port, and the middle lower section of the collection area of the tower body is also provided with a product collection port; the hydrogenation reactor is arranged at the top end of the tower body and communicated with the reaction area of the tower body, and the hydrogenation reactor is also provided with a hydrogen feeding hole and a reducing alcohol discharging hole. The utility model discloses a baffle formula reaction rectifying column and coupling hydrogenation ware realize that propionic acid and methyl alcohol carry out esterification reaction and rectification simultaneously and refine, have saved methyl propionate and sour follow-up separation process simultaneously, and can realize only using cheap methyl alcohol and CO to realize methyl propionate and the synthesis of alcohol as the raw materials.
Description
Technical Field
The utility model belongs to the technical field of chemical production, especially, relate to methyl propionate's reaction rectification device.
Background
The traditional process is that methyl propionate is synthesized by direct catalytic esterification, propionic acid and methanol are added into a reaction kettle, after methyl propionate is synthesized under the action of a catalyst, the methyl propionate is sent into a rectifying tower for separation, a mixture of propionic acid and water is obtained at the tower bottom, the mixture of methyl propionate, methanol and water is obtained at the tower top and then enters an extraction tower, an extracting agent (a mixture of polyhydric alcohol and water) is added into the extraction tower for extraction, high-purity methyl propionate is obtained, extraction liquid at the tower bottom enters a decompression tower for treatment, and the extracting agent prepared from the polyhydric alcohol and the water can be recycled. And separating the product in the bottom of the rectifying tower in a recovery tower to recycle the propionic acid.
In the traditional technology, esterification reaction and rectification purification are carried out in a reaction tower and a rectification tower in two steps, the process reaction flow is complex, the equipment investment is high, meanwhile, the raw material investment is increased due to the use of an extracting agent, and the energy consumption is increased; more importantly, in the adopted rectifying tower, because the raw material acid and the methyl propionate and other products are mixed together and need to be separated, the production cost of the methyl propionate is higher.
Disclosure of Invention
The purpose of the invention is as follows: to the problem and not enough of the above-mentioned current existence, the utility model aims at providing a baffle type methyl propionate reaction rectifying column of coupling hydrogenation adopts baffle type reaction rectifying column and coupling hydrogenation ware, realizes that propionic acid and methyl alcohol carry out esterification reaction and rectification simultaneously and refine, has saved methyl propionate and sour follow-up separation process simultaneously, and can realize only using cheap methyl alcohol and CO to realize methyl propionate and the synthesis of alcohol as the raw materials.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a following technical scheme: a partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation comprises a tower body, a hydrogenation reactor and a partition plate for dividing the space in the tower body into a reaction area and a collection area, wherein the upper part and the bottom of the reaction area of the tower body are respectively provided with an organic acid feed inlet and a methanol feed inlet, the top of the collection area of the tower body is provided with a light component production outlet and a light component reflux opening, and the middle lower section of the collection area of the tower body is also provided with a product production outlet; the hydrogenation reactor is arranged at the top end of the tower body and communicated with the reaction area of the tower body, and the hydrogenation reactor is also provided with a hydrogen feeding hole and a reducing alcohol discharging hole.
Preferably, the system also comprises a phase separation tank and a cooler, wherein the light component extraction outlet is respectively connected with an inlet of the phase separation tank and a feed inlet of the hydrogenation reactor through pipelines, and the bottom of the phase separation tank is respectively provided with an ester phase outlet and a water phase outlet which are connected with the light component reflux inlet; the cooler is arranged at the light component outlet.
Preferably, the hydrogenation reactor adopts a tubular reactor, and catalytic fillers are arranged in the tubular reactor.
Preferably, a vertical partition plate is arranged in the phase separation tank to divide the space of the tank body into an ester phase area and a water phase area, an inlet of the phase separation tank is arranged in the water phase area through a connecting straight pipe, and the other end of the straight pipe is close to the bottom of the tank body; the ester phase outlet and the water phase outlet are respectively positioned at the bottom of the ester phase area and the water phase area.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following: 1. the subsequent separation process of acid and ester is omitted by the isolation plate; 2. by coupling the hydrogenation unit and the phase separation process, the coproduction of methyl propionate and alcohol, and byproducts such as methyl butyrate and ethyl butyrate is realized by only taking cheap methanol and CO as raw materials. Therefore, the utility model discloses the flow is environmental protection more, and the main pollutant only is the top of the tower noncondensable gas, and esterification reaction produces water.
Drawings
FIG. 1 is a schematic structural diagram of a baffled methyl propionate reaction rectifying tower with coupling hydrogenation.
In the figure, a tower body 1, a hydrogenation reactor 2, a separation plate 3, a reaction zone 4, a collection zone 5, a light component extraction port 6, a light component confluence port 7, a reducing alcohol discharge port 8, a phase separation tank 9, a cooler 10, an ester phase outlet 11 and a water phase outlet 12.
Detailed Description
The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.
As shown in fig. 1, the utility model discloses iris type methyl propionate reaction rectifying column of coupling hydrogenation, including tower body and hydrogenation ware to and cut apart into the division board in reaction zone and collection district with the tower body inner space, and phase splitting jar and cooler, wherein:
the upper part and the bottom of the reaction zone of the tower body are respectively provided with an organic acid feed inlet and a methanol feed inlet, the top of the collection zone of the tower body is provided with a light component extraction outlet and a light component reflux opening, and the middle lower section of the collection zone of the tower body is also provided with a product extraction outlet; the hydrogenation reactor is arranged at the top end of the tower body and is communicated with a reaction zone of the tower body, the hydrogenation reactor is also provided with a hydrogen feeding hole and a reducing alcohol discharging hole, and reducing alcohol (mainly ethanol, propanol and the like) discharged from the reducing alcohol discharging hole is sent to the carbonylation reactor to carry out carbonylation reaction with CO to produce acetic acid and/or propionic acid, and is sent to an organic acid feeding hole of the reaction rectifying tower;
the light component extraction port is respectively connected with the inlet of the phase separation tank and the feeding port of the hydrogenation reactor through pipelines, the extracted light component is cooled through a cooler, the light component is cooled into liquid, the liquid is fed into the phase separation tank, and the uncondensed gas phase is circularly fed into the hydrogenation reactor. A vertical partition plate is arranged in the phase separation tank to divide the space of the tank body into an ester phase area and a water phase area, the inlet of the phase separation tank is arranged in the water phase area through a connecting straight pipe, and the other end of the straight pipe is close to the bottom of the tank body; the ester phase outlet and the water phase outlet are respectively positioned at the bottoms of the ester phase area and the water phase area, after the light component liquid enters the water phase area, the light component liquid is layered above due to low ester phase density and overflows from the vertical partition plate to enter the ester phase area, and finally the light component liquid reflows to the reaction rectifying tower from the ester phase outlet to carry out reaction rectification, and the water at the bottom of the water phase area is discharged from the water phase outlet at the bottom. And finally, the target products of methyl propionate and methanol are extracted from the tower side.
As a preferred scheme, the hydrogenation reactor adopts a tubular reactor, catalytic filler is arranged in the tubular reactor, a tower reaction area is communicated with the hydrogenation reactor, and light components after the esterification reaction rise to enter the hydrogenation reactor for hydrogenation reaction to obtain the reducing alcohol.
Compared with the traditional method, the conversion rate is 95%, and the reaction rectification process can improve the conversion rate to 99.5%. The isolation plate reaction rectification and coupling hydrogenation process replaces the functions of a reaction kettle, a rectification tower and a recovery tower in the traditional process, reduces the equipment investment, reduces the energy consumption by 60 percent, and simultaneously realizes the synthesis of the azeotropic product of the organic acid ester and the alcohol by only taking easily obtained and cheap methanol and CO as raw materials.
It is understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, and that modifications to various equivalent forms of the present invention will occur to those skilled in the art upon reading the present disclosure and are intended to be included within the scope of the appended claims.
Claims (4)
1. The partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation is characterized in that: the device comprises a tower body, a hydrogenation reactor and a partition board for dividing the space in the tower body into a reaction area and a collection area, wherein the upper part and the bottom of the reaction area of the tower body are respectively provided with an organic acid feed inlet and a methanol feed inlet, the top of the collection area of the tower body is provided with a light component collection port and a light component reflux port, and the middle lower section of the collection area of the tower body is also provided with a product collection port; the hydrogenation reactor is arranged at the top end of the tower body and communicated with the reaction area of the tower body, and the hydrogenation reactor is also provided with a hydrogen feeding hole and a reducing alcohol discharging hole.
2. The baffled methyl propionate reactive distillation column coupled with hydrogenation according to claim 1, wherein: the device comprises a hydrogenation reactor, a phase separation tank, a light component extraction port, a phase separation tank inlet, a phase separation tank outlet, a phase separation tank inlet, a hydrogenation reactor inlet, a phase separation tank outlet, a hydrogenation reactor inlet, a hydrogenation reactor outlet, a phase separation tank and a cooler, wherein the light component extraction port is respectively connected with the phase separation tank inlet and the hydrogenation reactor inlet through pipelines; the cooler is arranged at the light component outlet.
3. The partition type methyl propionate reactive distillation column with coupled hydrogenation according to claim 1, wherein: the hydrogenation reactor adopts a tubular reactor, and catalytic fillers are arranged in the tubular reactor.
4. The baffled methyl propionate reactive distillation column coupled with hydrogenation according to claim 2, wherein: a vertical partition plate is arranged in the phase separation tank to divide the space of the tank body into an ester phase area and a water phase area, the inlet of the phase separation tank is arranged in the water phase area through a connecting straight pipe, and the other end of the straight pipe is close to the bottom of the tank body; the ester phase outlet and the water phase outlet are respectively positioned at the bottom of the ester phase area and the water phase area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123159468.XU CN216725835U (en) | 2021-12-15 | 2021-12-15 | Partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123159468.XU CN216725835U (en) | 2021-12-15 | 2021-12-15 | Partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation |
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| Publication Number | Publication Date |
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| CN216725835U true CN216725835U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123159468.XU Active CN216725835U (en) | 2021-12-15 | 2021-12-15 | Partition plate type methyl propionate reaction rectifying tower with coupling hydrogenation |
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2021
- 2021-12-15 CN CN202123159468.XU patent/CN216725835U/en active Active
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