CN109467641A - A kind of preparation method of high solids content cation polyacrylamide emulsion - Google Patents
A kind of preparation method of high solids content cation polyacrylamide emulsion Download PDFInfo
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- CN109467641A CN109467641A CN201811261890.6A CN201811261890A CN109467641A CN 109467641 A CN109467641 A CN 109467641A CN 201811261890 A CN201811261890 A CN 201811261890A CN 109467641 A CN109467641 A CN 109467641A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/32—Polymerisation in water-in-oil emulsions
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a kind of preparation methods of high solids content cation polyacrylamide emulsion.Preparation method of the present invention causes technique using segmentation, and it is added dropwise at a slow speed in the redoxomorphic stage using 1~5% low concentration reducing agent solution, reduce redoxomorphic stage polymerization speed, extend polymerization time, it solves the synthesis of low molecular weight polyacrylamide lotion and is unable to low temperature initiation, to the demanding problem of radiating capacity of equipment.The present invention is added dropwise at a slow speed by low concentration reducing agent solution, and control ceiling temperature in polymerization in safe range, has the sufficient time to distribute heat of polymerization, and increase redoxomorphic stage conversion ratio, eliminates the security risk of azo initiating stage.Low molecular weight high solids content cation polyacrylamide emulsion product prepared by the present invention can be widely applied to various sewage, sludge treatment field.
Description
Technical field:
The present invention relates to a kind of chemical manufacturing process, in particular to a kind of high solids content cation polyacrylamide emulsion
Preparation method.
Background technique:
Acrylamide, which is easy to polymerize, obtains the polymer of high molecular weight, and polyacrylamide polymerize as a kind of linear water soluble
Object can be widely applied in the fields such as water process, papermaking and oilfield exploitation.The preparation method of polyacrylamide mainly has water
The synthesis technologies such as polymerisation in solution, inverse emulsion polymerization, wherein there is heat easily to spread, easy temperature control system, divide for inverse emulsion polymerization
The features such as son amount height and narrowly distributing, and obtained product emulsion can instantaneously be dissolved in the water, and produce with solid polypropylene amide
Product dissolution times is long, is difficult to homogeneous phase ratio, and when application is more convenient, therefore has become a hot topic of research, and be gradually applied at water
The every field such as reason, oil field.But the polymerization reaction of acrylamide is strong exothermal reaction, acrylamide polymerization heat is 81.51 thousand
Burnt/mole, can calculate 45% solid content polyacrylamide emulsion adiabatic temperature rise is 123.28 DEG C.Therefore, polypropylene is being prepared
During amide lotion, especially high solid content emulsion, if preparation process smoothly cannot make system radiate, polymerization system
Temperature is excessively high to cause material bumping, in kettle pressure sharply increase, the danger such as high-temperature material splash.
Cationic polyacrylamide has numerous cation group as a kind of cationic high-molecular flocculant,
Flocculant can be made to be adsorbed in electronegative suspended particle, electronegative emulsified oil droplet by electrostatic interaction and contain anionic group
The organic colloid of water solubility on, in and in the case that microparticle surfaces charge makes it agglomerate unstability, can further utilize its length point
The adsorption bridging of subchain acts on, and makes suspended particulate cohesion, flocculating setting, so that emulsified oil droplet cohesion become larger, float or is demulsified, makes water
Dissolubility organic pollutant electrostatic is attracting therewith and coagulation, therefore it has cohesion, flocculated dual function, is a kind of " multi-functional "
Flocculant can effectively reduce turbidity, oil content and the COD of water, be widely used in the processing of various industry and sanitary sewage.
In practical applications, it is formed after low molecular weight (molecular weight is less than 4,000,000) cationic polyacrylamide processing sewage
Floc sedimentation stickiness is low, dewatering is good, facilitate after desiccation and handled, the cationic polyacrylamide of low molecular weight high solids content
Lotion is more with practical value in sewage treatment field.But from the point of view of radical polymerization mechanism, the polymer of low molecular weight is obtained,
Higher initiation temperature is needed, and high solid content emulsion also has the maximum temperature of polymerization reaction to control system heat dissipation
Certain limitation, which in turns increases the preparation difficulty of low molecular weight high solids content cation polyacrylamide emulsion.From text
Offer and the case where patent report from the point of view of, only small part research high solids content (solid content >=42%) cationic polyacrylamide cream
The report of liquid polymerization, (Ochoa-Gomez J R, Escudero-Sanz F J, Sasia the P M, et such as Ochoa Gomez
Al.Semicontinuous copolymerization of 80/20wt% [2- (acryloyloxy) ethyl]
trimethyl ammonium chloride/acrylamide in an inverse microemulsion at high
Comonomer concentrations [J] .J Appl Polym Sci, 2009,114 (5): 2673-2684.) control cream
The composition of change system and the structure of emulsifier have prepared the stable cationic lotion of solid content 42%, CN104292384 preparation
Solid content is up to 45% stable cationic lotion, and the above research, which is not referred to how to handle in polymerization process, to be dissipated
Heat problem, and research be directed to be all high molecular weight polyacrylamide.CN105348439 is prepared for solid content and is up to
To 45% stable cationic lotion, and the solution to radiate in high solid content emulsion polymerization process is illustrated, but
The research is also for high molecular weight polyacrylamide, and when preparation is to cause polymerization since low temperature (10~15 DEG C), fails to explain
How bright low molecular weight high solids content cation polyacrylamide emulsion safely and effectively radiates when polymerizeing, and guarantees the safety of reaction
It carries out.
Summary of the invention:
It is poly- to solve low molecular weight high solids content cation for the defects of above-mentioned polyacrylamide emulsion research by the present invention
The problem of radiating when prepared by acrylamide lotion, provide that a kind of synthesis technology is safe and reliable, low molecular weight high solids content cation
The preparation method of polyacrylamide emulsion.
A kind of preparation method of high solids content cation polyacrylamide emulsion provided by the invention, includes the following steps:
Monomer is configured to the monomer solution of mass percent 50~70%, emulsifier, molten is added in monomer solution
In the oil-based system that agent oil is constituted, prepared oxidizing agent solution is added in high speed shearing emulsification after emulsification, will by circulator bath
Material is heated to 30~35 DEG C and keeps the temperature, and leads to High Purity Nitrogen gas drive oxygen, is kept stirring；After letting nitrogen in and deoxidizing is complete, reduction is slowly added dropwise
Agent solution 3~5 hours, stops being added dropwise when temperature of charge rises to maximum temperature and is cooled to 40 DEG C, improves circulator bath temperature,
Material is heated to 50~60 DEG C and is kept the temperature, prepared azo initiator solution is added, stops stirring after mixing evenly, is stood
It 3~5 hours, opens stirring and anti-phase dose is added dropwise, stirs after adjusting circulator bath temperature is down to temperature of charge between 20~30 DEG C
It is made after mixing uniformly；
The monomer includes at least one non-ionic monomer and a kind of cationic monomer, and non-ionic monomer is selected from acryloyl
One of amine, Methacrylamide are a variety of, and cationic monomer is selected from MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, propylene
One of acyloxyethyl trimethyl ammonium chloride and dimethyl diallyl ammonium chloride are a variety of, and monomer additive amount accounts for lotion gross weight
The 45~50% of amount；
The emulsifier be Hypermer series macromolecular surfactant, Span 60, Span 65, Span 80, Span 85,
One or more mixture in Arlacel83, HLB value control between 4~6, and emulsifier additive amount accounts for the 2 of lotion total weight
~4%；
The solvent naphtha is white oil, isomeric alkane hydrocarbon ils, mixture one or more in Porous deproteinized bone solvent naphtha, solvent naphtha
Boiling range is between 200~250 DEG C, 0.8~1.6mm of kinematic viscosity2Between/s, solvent naphtha additive amount account for lotion total weight 21~
26%；
The azo initiator is that azodiisobutyronitrile, azobisisoheptonitrile, azo-bis-iso-dimethyl, azo two are different
Butanimidamide, monohydrochloride, two isobutyl imidazoline hydrochloride of azo, mixture one or more in azo isobutyronitrile base formamide, azo
Initiator additive amount accounts for the 0.2~1% of total monomer weight；
The anti-phase dose is polysorbate60, polysorbate65, Tween 80, polysorbate85, Op10, one or more in Atlas G1086
Mixture, HLB value control between 10~15, anti-phase dose additive amount accounts for the 1~3% of lotion total weight；
The reducing agent is sodium hydrogensulfite, sodium thiosulfate, mixture one or more in sodium pyrosulfite, reduction
The concentration of agent solution is 1~5%, and rate of addition is 0.04~0.4g/min.
Preparation method of the present invention does not cause technique only with segmentation in reversed phase latex of polyacrylamide preparation process, and
And the process means that low concentration reducing agent solution is added dropwise at a slow speed are used in the redoxomorphic stage, and one side reduction polymerization speed, one
Aspect extends polymerization time, has not only controlled ceiling temperature in polymerization in safe range, but also heat of polymerization is made to have the sufficient time to distribute.
Prolonged redox polymerization makes the conversion ratio in the stage reach 70% or more, and residue carries out lower single order less than 30% monomer
Section azo cause polymerization, azo initiating stage use similar to adiabatic polymerisation standing react, but because remaining amount of monomer compared with
Less, the problems such as material bumping will not being generated there is runaway reaction.Compared with the technique of CN105348439,
CN105348439 with low temperature due to that can be caused, so the stages process caused using three sections, but turn after the redoxomorphic stage
Rate is only 40% or so, residue be more than half monomer carry out next stage azo cause polymerization, if encounter stirring or
In the case that cooling medium fails, very big security risk is had, and technique is caused using low temperature, be only capable of obtaining 10,000,000 or more
The reversed phase latex of polyacrylamide of molecular weight.Therefore, it compared with prior art, the present invention preparation process is safer, and can prepare
Obtain the reversed phase latex of polyacrylamide of 4,000,000 or less molecular weight.
Specific embodiment:
Preparation method of the present invention is further described combined with specific embodiments below.
Embodiment 1
426 kilograms of acrylamides, 377 kilograms of deionized waters, methyl of 256 kilogram-masses than 80% are added in modulation kettle
Acrylyl oxy-ethyl-trimethyl salmiac solution, stirs evenly；390 kilograms of Porous deproteinized bone solvent naphthas, 52,000 are added in emulsifying kettle
Gram Span 80, stirs evenly；The water phase prepared in modulation kettle is added in emulsifying kettle, high speed shearing emulsification is carried out, emulsification is completed
The solution containing 1200 grams of ammonium persulfates is added, material is heated to 30 DEG C by circulator bath, it is small to lead to High Purity Nitrogen gas drive oxygen 1
When, it is kept stirring.After letting nitrogen in and deoxidizing, solution of sodium bisulfite 3 hours that concentration 3% is added dropwise with the speed of 0.1 gram/minute, when
Temperature of charge rises to highest and stops being added dropwise when being cooled to 40 DEG C, improves circulator bath temperature, material is heated to 60 DEG C, is added
Solution containing 2500 grams of azo-bis-isobutyrate hydrochlorides stops stirring after mixing evenly, stands 3 hours, is then turned on stirring, adjusts
Circulator bath temperature is saved to 20 DEG C, after temperature of charge is down to 30 DEG C or less, 39 kilograms of anti-phase doses is added dropwise, go out after mixing evenly
Material, obtains transparent reversed phase latex of polyacrylamide, solid content 45%, molecular weight 3,000,000, cationic degree 15%.
Embodiment 2
426 kilograms of acrylamides, 377 kilograms of deionized waters, methyl of 256 kilogram-masses than 80% are added in modulation kettle
Acrylyl oxy-ethyl-trimethyl salmiac solution, stirs evenly；390 kilograms of Porous deproteinized bone solvent naphthas, 52,000 are added in emulsifying kettle
Gram Span 80, stirs evenly；The water phase prepared in modulation kettle is added in emulsifying kettle, high speed shearing emulsification is carried out, emulsification is completed
The solution containing 2000 grams of ammonium persulfates is added, material is heated to 35 DEG C by circulator bath, it is small to lead to High Purity Nitrogen gas drive oxygen 1
When, it is kept stirring.After letting nitrogen in and deoxidizing, solution of sodium bisulfite 3 hours that concentration 4% is added dropwise with the speed of 0.06 gram/minute, when
Temperature of charge rises to highest and stops being added dropwise when being cooled to 40 DEG C, improves circulator bath temperature, material is heated to 60 DEG C, is added
Solution containing 4000 grams of two isobutyl imidazoline hydrochlorides of azo stops stirring after mixing evenly, stands 4 hours, is then turned on and stirs
It mixes, adjusts circulator bath temperature to 20 DEG C, after temperature of charge is down to 30 DEG C or less, 39 kilograms of anti-phase doses are added dropwise, stir evenly
After discharge.Obtain transparent reversed phase latex of polyacrylamide, solid content 45%, molecular weight 2,000,000, cationic degree 15%.
Embodiment 3
291 kilograms of acrylamides, 343 kilograms of deionized waters, propylene of 425 kilogram-masses than 80% are added in modulation kettle
Acyloxyethyl trimethyl ammonia chloride ammonium salt solution, stirs evenly；390 kilograms of isomeric alkane hydrocarbon ils, 30 kilograms of Spans are added in emulsifying kettle
80 and 22 kilograms of Arlacel83, stir evenly；The water phase prepared in modulation kettle is added in emulsifying kettle, high speed shear cream is carried out
Change, emulsification completes that the solution containing 1500 grams of potassium bromates is added, and material is heated to 35 DEG C by circulator bath, leads to high pure nitrogen
It drives oxygen 1 hour, is kept stirring.After letting nitrogen in and deoxidizing, the sodium metabisulfite solution 4 of concentration 2% is added dropwise with the speed of 0.12 gram/minute
Hour, stop being added dropwise when temperature of charge rises to highest and is cooled to 40 DEG C, improves circulator bath temperature, material is heated to 50
DEG C, the solution containing 2000 grams of azo-bis-isobutyrate hydrochlorides and 1000 grams of two isobutyl imidazoline hydrochlorides of azo, stirring is added
Stop stirring after uniformly, stand 4 hours, be then turned on stirring, adjusts circulator bath temperature to 20 DEG C, when temperature of charge is down to 30 DEG C
After below, 39 kilograms of anti-phase doses are added dropwise, discharge after mixing evenly.Obtain transparent reversed phase latex of polyacrylamide, solid content
45%, molecular weight 3,000,000, cationic degree 30%.
Embodiment 4
193 kilograms of acrylamides, 136 kilograms of deionized waters, diformazan of 730 kilogram-masses than 60% are added in modulation kettle
Base diallyl ammonium chloride solution, stirs evenly；390 kilograms of isomeric alkane hydrocarbon ils, 12 kilograms are added in emulsifying kettle
Hypermer2296 and 40 kilogram of Span 80, stirs evenly；The water phase prepared in modulation kettle is added in emulsifying kettle, high speed is carried out
Emulsification pretreatment, emulsification complete that the solution containing 3000 grams of potassium bromates is added, and material is heated to 35 DEG C by circulator bath, leads to height
Purity nitrogen gas drive oxygen 1 hour, is kept stirring.After letting nitrogen in and deoxidizing, the sodium thiosulfate of concentration 2% is added dropwise with the speed of 0.2 gram/minute
Solution 5 hours, stop being added dropwise when temperature of charge rises to highest and is cooled to 40 DEG C, improve circulator bath temperature, by material plus
Heat is added molten containing 3000 grams of azo-bis-isobutyrate hydrochlorides and 2000 grams of two isobutyl imidazoline hydrochlorides of azo to 50 DEG C
Liquid stops stirring after mixing evenly, stands 5 hours, is then turned on stirring, adjusts circulator bath temperature to 20 DEG C, works as temperature of charge
After being down to 30 DEG C or less, 39 kilograms of anti-phase doses are added dropwise, discharge after mixing evenly.Transparent reversed phase latex of polyacrylamide is obtained,
Solid content 45%, molecular weight 3,000,000, cationic degree 50%.
Claims (1)
1. a kind of preparation method of high solids content cation polyacrylamide emulsion, it is characterised in that:
Monomer is configured to the monomer solution of mass percent 50~70%, emulsifier, solvent naphtha is added in monomer solution
In the oil-based system of composition, prepared oxidizing agent solution is added in high speed shearing emulsification after emulsification, by circulator bath by material
It is heated to 30~35 DEG C and keeps the temperature, lead to High Purity Nitrogen gas drive oxygen, be kept stirring；After letting nitrogen in and deoxidizing is complete, with 0.04~0.4g/min
Speed be slowly added dropwise mass concentration be 1~5% reducing agent solution 3~5 hours, when temperature of charge rises to maximum temperature and cools down
Stop being added dropwise when to 40 DEG C, improves circulator bath temperature, material is heated to 50~60 DEG C and is kept the temperature, prepared azo is added
Initiator solution stops stirring after mixing evenly, stands 3~5 hours, opens stirring, and adjusting circulator bath temperature makes material temperature
After degree is down between 20~30 DEG C, anti-phase dose is added dropwise, is made after mixing evenly；
The monomer includes at least one non-ionic monomer and a kind of cationic monomer, and non-ionic monomer is selected from acrylamide, first
One of base acrylamide is a variety of, and cationic monomer is selected from MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acryloyl-oxy
One of ethyl-trimethyl salmiac and dimethyl diallyl ammonium chloride are a variety of, and monomer additive amount accounts for lotion total weight
45~50%；
The emulsifier be Hypermer series macromolecular surfactant, Span 60, Span 65, Span 80, Span 85,
One or more mixture in Arlacel83, HLB value control between 4~6, and emulsifier additive amount accounts for the 2 of lotion total weight
~4%；
The solvent naphtha is white oil, isomeric alkane hydrocarbon ils, mixture one or more in Porous deproteinized bone solvent naphtha, the boiling range of solvent naphtha
Between 200~250 DEG C, between 0.8~1.6mm2/s of kinematic viscosity, solvent naphtha additive amount account for lotion total weight 21~
26%；
The azo initiator is azodiisobutyronitrile, azobisisoheptonitrile, azo-bis-iso-dimethyl, two NSC 18620 of azo
Hydrochloride, two isobutyl imidazoline hydrochloride of azo, mixture one or more in azo isobutyronitrile base formamide, azo cause
Agent additive amount accounts for the 0.2~1% of total monomer weight；
The anti-phase dose is polysorbate60, polysorbate65, Tween 80, polysorbate85, Op10, one or more mixed in Atlas G1086
Object is closed, HLB value controls between 10~15, and anti-phase dose additive amount accounts for the 1~3% of lotion total weight；
The reducing agent is sodium hydrogensulfite, sodium thiosulfate, mixture one or more in sodium pyrosulfite.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861341A (en) * | 2021-10-18 | 2021-12-31 | 北京石油化工学院 | Oil-soluble flocculant special for oil-based drilling fluid and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104292384A (en) * | 2014-09-19 | 2015-01-21 | 中国海洋石油总公司 | Preparation method of cationic polyacrylamide reverse-phase microemulsion |
| CN105348439A (en) * | 2015-11-20 | 2016-02-24 | 中国海洋石油总公司 | Preparation method of high-solid-content polyacrylamide emulsion |
| WO2016079383A1 (en) * | 2014-11-17 | 2016-05-26 | Kemira Oyj | Method for preparing a dry cationic hydrogel polymer product, polymer product and its use |
| CN106749893A (en) * | 2016-11-24 | 2017-05-31 | 浙江大学 | A kind of method for improving inverse emulsion system stability |
-
2018
- 2018-10-26 CN CN201811261890.6A patent/CN109467641A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104292384A (en) * | 2014-09-19 | 2015-01-21 | 中国海洋石油总公司 | Preparation method of cationic polyacrylamide reverse-phase microemulsion |
| WO2016079383A1 (en) * | 2014-11-17 | 2016-05-26 | Kemira Oyj | Method for preparing a dry cationic hydrogel polymer product, polymer product and its use |
| CN105348439A (en) * | 2015-11-20 | 2016-02-24 | 中国海洋石油总公司 | Preparation method of high-solid-content polyacrylamide emulsion |
| CN106749893A (en) * | 2016-11-24 | 2017-05-31 | 浙江大学 | A kind of method for improving inverse emulsion system stability |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861341A (en) * | 2021-10-18 | 2021-12-31 | 北京石油化工学院 | Oil-soluble flocculant special for oil-based drilling fluid and preparation method thereof |
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Application publication date: 20190315 |