CN104877070A - Preparation method of dried cationic polyacrylamide powder - Google Patents
Preparation method of dried cationic polyacrylamide powder Download PDFInfo
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- CN104877070A CN104877070A CN201510340102.2A CN201510340102A CN104877070A CN 104877070 A CN104877070 A CN 104877070A CN 201510340102 A CN201510340102 A CN 201510340102A CN 104877070 A CN104877070 A CN 104877070A
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Abstract
The invention relates to a preparation method of dried cationic polyacrylamide powder. The method comprises the steps of (1) preparing a solution, namely, mixing DAC and DMC based on the ratio of 2: 1 or 3: 1 to obtain a solute which is 5 to 80% by mass according to the total mass of the solute, adding the solute A to a reaction kettle, adding a solute B which is acrylamide and 20 to 95% by mass according to the total mass of the solute to the reaction kettle, then adding water to prepare into the solution with polymerizing concentration of 30%, and regulating the pH to be 3 to 5 through purified hexanedioic acid; (2) cooling; (3) adding an initiator; (4) obtaining glue blocks from all the solution after the reaction, granulating the glue blocks and then drying. According to the method, no implosion reaction occurs during preparing the dried cationic polyacrylamide powder; the glue blocks can be kept in the reaction kettle after the reaction; therefore, the workload is decreased; dissolved materials are avoided; the obtained dried cationic powder is high in content.
Description
Technical field
The present invention relates to a kind of preparation method of cation PAM dry powder.
Background technology
Polyacrylamide is a kind of linear macromolecule polymkeric substance generated through Radical Addition by monomeric acrylamide, for white powder, soluble in water, be insoluble in benzene, the common organic solvents such as ether and acetone, nontoxic, non-corrosiveness, solid polypropylene acid amides has water absorbability, it is the important high molecular weight water soluble polymer of a class, there are special physicochemical property, easily by grafting or crosslinkedly obtain side chain or cancellated multiple modifier, polyacrylamide amine molecule can introduce various ionic group to obtain specific performance, it is widely used in chemical industry, metallurgical, geology, coal, oil, the every field such as papermaking and water treatment.
Cationic polyacrylamide is the multipolymer be made up of a kind of positively charged ion unit and acrylamide non ionic unit, with the positive charge group that can ionize on its molecular chain, polycation and little negatively charged ion can be ionized in water, can adsorb with the suspended particles be scattered in solution and build bridge, have extremely strong throwing out.Cationic polyacrylamide is widely used in the field such as water treatment and metallurgy, papermaking, oil, chemical industry, weaving, ore dressing, as thickening material, flocculation agent, flow improver, has the effects such as gel, sedimentation, reinforcement.Cationic polyacrylamide is specially adapted to the processed of municipal effluent, municipal sludge, paper mill sludge and other industrial sludge.
, easily there is implode in the method for traditional making cation PAM dry powder, blob of viscose must be released from reactor after reaction terminates, and then carry out granulation, dry, and the cation PAM dry powder molecular weight of working it out is lower, insolubles is many.
Summary of the invention
In order to solve the problem, the invention provides a kind of preparation method of cation PAM dry powder.
The technical solution used in the present invention is:
A preparation method for cation PAM dry powder, comprises the following steps:
(1) obtain solution: DAC and DMC is mixed according to 2:1 or 3:1, be configured to solute A, solute A accounts for the 5-80% of solute total mass, solute A is poured in reactor, in reactor, add solute B again, solute B is acrylamide, and solute B accounts for the 20-95% of solute total mass, adding water and be mixed with the solution that polymerization concentration is 30%, is then 3-5 by smart hexanodioic acid adjust ph;
(2) lower the temperature: the solution frozen water regulating pH is cooled to 0-3 DEG C;
(3) add initiator: after cooling, in reactor, inflated with nitrogen 30min removes to oxygen and totally adds initiator again, starts to react, when temperature is raised to 8 DEG C, stop inflated with nitrogen, and reactor is airtight;
(4) reaction terminates rear solution and becomes blob of viscose completely, then blob of viscose granulation is dried again.
The flow control of the described middle nitrogen of step (3) is at 40m
3/ h.
Described in step (3), initiator is Diisopropyl azodicarboxylate 0.1%, azo two isobutyl imidazoline hydrochloride 20ppm, sodium formiate 40ppm, sodium bisulfite 10ppm and ferrous ammonium sulphate 4ppm.
The temperature of drying described in step (4) is no more than 140 DEG C.
The chemical name of DMC is MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, DMC is cationic monomer, can with other monomer homopolymerization or copolymerization, obtained cationic polymers, this polymkeric substance has extremely strong polarity and the affinity to anionic species, thus can be widely used as cationic flocculant.Can be used for the wastewater treatment of the industry such as sludge dehydration process and papermaking, coal flotation, printing, dyestuff of sewage work.In addition, DMC also can be used for production acid resistance super absorbent resin and oil field chemical etc.
The chemical name of DAC is acrylyl oxy-ethyl-trimethyl salmiac, is the quaternary ammonium salt generated after dimethylaminoethyl acrylate and methyl chloride react, water soluble.Be mainly used in homopolymerization or produce cationic high-molecular flocculant with acrylamide copolymerization.Now tend to be replaced by methyl chloride acrylyl oxy-ethyl-trimethyl ammonium.
The invention has the beneficial effects as follows:
Do not have implode reaction in the making processes of cation PAM dry powder of the present invention to occur, reaction terminates rear blob of viscose and can put in reactor, decreases workload, does not also have insolubles, and point cation PAM dry powder molecular weight obtained is higher.
Embodiment
Embodiment 1
A preparation method for cation PAM dry powder, comprises the following steps:
(1) obtain solution: DAC and DMC is mixed according to 2:1, be configured to solute A, solute A accounts for 80% of solute total mass, solute A is poured in reactor, in reactor, add solute B again, solute B is acrylamide, and solute B accounts for 20% of solute total mass, adding water and be mixed with the solution that polymerization concentration is 30%, is then 3 by smart hexanodioic acid adjust ph;
(2) lower the temperature: the solution frozen water regulating pH is cooled to 0 DEG C;
(3) initiator is added: after cooling, inflated with nitrogen 30min in reactor, the flow control of nitrogen is at 40m
3/ h, remove totally to oxygen and add initiator, start to react, described initiator is Diisopropyl azodicarboxylate, azo two isobutyl imidazoline hydrochloride, sodium formiate, sodium bisulfite and ferrous ammonium sulphate, Diisopropyl azodicarboxylate addition is 0.1% of total solution weight, azo two isobutyl imidazoline hydrochloride addition is 20ppm, sodium formiate addition is 40ppm, sodium bisulfite addition is 10ppm, ferrous ammonium sulphate addition is 4ppm, stop rushing nitrogen when temperature is raised to 8 DEG C, reactor is airtight;
(4) react reaction after 1.5 hours to terminate, solution becomes blob of viscose completely, and final temperature is 70 DEG C, blob of viscose granulation is dried again, and the temperature of oven dry is no more than 140 DEG C.
Embodiment 2
A preparation method for cation PAM dry powder, comprises the following steps:
(1) obtain solution: DAC and DMC is mixed according to 3:1, be configured to solute A, solute A accounts for 5% of solute total mass, solute A is poured in reactor, in reactor, add solute B again, solute B is acrylamide, and solute B accounts for 95% of solute total mass, adding water and be mixed with the solution that polymerization concentration is 30%, is then 3,4 or 5 by smart hexanodioic acid adjust ph;
(2) lower the temperature: the solution frozen water regulating pH is cooled to 0 DEG C, 1 DEG C, 2 DEG C or 3 DEG C;
(3) initiator is added: after cooling, inflated with nitrogen 30min in reactor, the flow control of nitrogen is at 40m
3/ h, remove totally to oxygen and add initiator, start to react, described initiator is Diisopropyl azodicarboxylate, azo two isobutyl imidazoline hydrochloride, sodium formiate, sodium bisulfite and ferrous ammonium sulphate, Diisopropyl azodicarboxylate addition is 0.1% of total solution weight, azo two isobutyl imidazoline hydrochloride addition is 20ppm, sodium formiate addition is 40ppm, sodium bisulfite addition is 10ppm, ferrous ammonium sulphate addition is 4ppm, stop rushing nitrogen when temperature is raised to 8 DEG C, reactor is airtight;
(4) react reaction after 1.5 hours to terminate, solution becomes blob of viscose completely, and final temperature is 70 DEG C, blob of viscose granulation is dried again, and the temperature of oven dry is no more than 140 DEG C.
Embodiment 3
DAC and DMC is mixed according to 2:1 or 3:1, be configured to solute A, solute A accounts for the 5-80% of solute total mass, solute A is poured in reactor, in reactor, add solute B again, solute B is acrylamide, and solute B accounts for the 20-95% of solute total mass, adding water and be mixed with the solution that polymerization concentration is 30%, is then 3-5 by smart hexanodioic acid adjust ph; The per-cent that DAC, DMC and acrylamide account for solute gross weight is as shown in table 1:
Table 1 DAC, DMC and acrylamide account for the per-cent of solute gross weight
Do not have implode reaction in the making processes of cation PAM dry powder of the present invention to occur, reaction terminates rear blob of viscose and can put in reactor, decreases workload, does not also have insolubles, divide the cation PAM dry powder molecular weight obtained higher, ion degree scope is 5-80%.
Claims (4)
1. a preparation method for cation PAM dry powder, is characterized in that: comprise the following steps:
(1) obtain solution: DAC and DMC is mixed according to 2:1 or 3:1, be configured to solute A, solute A accounts for the 5-80% of solute total mass, solute A is poured in reactor, in reactor, add solute B again, solute B is acrylamide, and solute B accounts for the 20-95% of solute total mass, adding water and be mixed with the solution that polymerization concentration is 30%, is then 3-5 by smart hexanodioic acid adjust ph;
(2) lower the temperature: the solution frozen water regulating pH is cooled to 0-3 DEG C;
(3) add initiator: after cooling, in reactor, inflated with nitrogen 30min removes to oxygen and totally adds initiator again, starts to react, when temperature is raised to 8 DEG C, stop inflated with nitrogen, and reactor is airtight;
(4) reaction terminates rear solution and becomes blob of viscose completely, then blob of viscose granulation is dried again.
2. the preparation method of a kind of cation PAM dry powder according to claim 1, is characterized in that: the flow control of the described middle nitrogen of step (3) is at 40m
3/ h.
3. the preparation method of a kind of cation PAM dry powder according to claim 1, is characterized in that: initiator described in step (3) is Diisopropyl azodicarboxylate 0.1%, azo two isobutyl imidazoline hydrochloride 20ppm, sodium formiate 40ppm, sodium bisulfite 10ppm, ferrous ammonium sulphate 4ppm.
4. the preparation method of a kind of cation PAM dry powder according to claim 1, is characterized in that: the temperature of drying described in step (4) is no more than 140 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924575A (en) * | 2016-06-28 | 2016-09-07 | 江西富诚环保新材料科技有限公司 | Composite drag reducer special for shale gas and preparation method thereof |
| CN106883835A (en) * | 2017-03-14 | 2017-06-23 | 中国石油集团渤海钻探工程有限公司 | Self-association fracturing fluid system with control water function and preparation method thereof |
-
2015
- 2015-06-18 CN CN201510340102.2A patent/CN104877070A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924575A (en) * | 2016-06-28 | 2016-09-07 | 江西富诚环保新材料科技有限公司 | Composite drag reducer special for shale gas and preparation method thereof |
| CN106883835A (en) * | 2017-03-14 | 2017-06-23 | 中国石油集团渤海钻探工程有限公司 | Self-association fracturing fluid system with control water function and preparation method thereof |
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Application publication date: 20150902 |