CN105086309A - Preparation method of polyacrylate flocculant - Google Patents
Preparation method of polyacrylate flocculant Download PDFInfo
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- CN105086309A CN105086309A CN201410207496.XA CN201410207496A CN105086309A CN 105086309 A CN105086309 A CN 105086309A CN 201410207496 A CN201410207496 A CN 201410207496A CN 105086309 A CN105086309 A CN 105086309A
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Abstract
A preparation method of a polyacrylate flocculant comprises the following steps: (1) preparation of an acrylate solution I: controlling system temperature to be lower than 35 DEG C and mixing alkali at the weight percent concentration of 22.6% and acrylic acid according to the molar ratio of 1:1 so as to obtain the acrylate solution I; (2) preparation of a polymerization additive liquid II: dissolving 0.5-4 parts by weight of an anti-cross-linking agent, 0.1-0.5 part by weight of an anti-agglomeration agent and 0.16-0.46 part by weight of an initiator in 10-30 parts by weight of water and uniformly mixing the above components so as to obtain the polymerization additive liquid II; (3) adjusting pH value of 346 parts by weight of the acrylate solution I to 12-12.5 by the use of alkali, adding the polymerization additive liquid II, stirring and uniformly mixing, and standing at normal temperature for 3-10 h; (4) smashing, drying and crushing. The alkali for neutralizing acrylic acid and the alkali for adjusting pH value of the system are sodium hydroxide, potassium hydroxide, sodium bicarbonate or sodium carbonate. The initiator is sodium persulfate or potassium persulfate and sodium sulfite, sodium hydrogen sulfite or a potassium bisulfate compound. The anti-cross-linking agent is urea or EDTA. The anti-agglomeration agent is soap base or sodium stearate.
Description
Technical field
The present invention relates to a kind of preparation method of flocculation agent, particularly a kind of preparation method of polyacrylate flocculant.
Background technology
Sodium polyacrylate is a kind of novel water-soluble polymer flocculation agent.Now foodstuffs industry, paper industry, municipal sewage treatment are widely used in: caustic soda and the manufacturing salt refining of soda ash; Sugar manufacturing industry juice,liming: the red-mud settlement and separation of alumina producer.Its throwing out one is the negative charge after being ionized by sodium acrylate polymer, in and the electric charge of positively charged particle in water; Two is that macromolecular bridging action makes particulate matter flocculating settling in water.The high molecular weight sodium polyacrylate of existing method synthesis, exists due to its poorly water-soluble of crosslinked action, due to the water absorbability easy conglomeration when dissolving by force, deposit time the easy moisture absorption and the problems such as caking, directly affect its use.In addition in preparation process, owing to forming bulk gels, be difficult to chopping and drying.
Summary of the invention
The object of the present invention is to provide a kind of molecular weight high, water dissolution performance be good, not conglomeration when dissolving, deposit the not easily moisture absorption, and gel easily shreds the preparation method of dry sodium polyacrylate flocculation agent.
Preparation method of the present invention is made up of (following number is parts by weight) following steps: the preparation of (one) acrylate solution I:
Mol ratio, lower than 35 DEG C, is 22.6% (weight percent concentration) alkali and the vinylformic acid mixing of 1: 1, obtains acrylate solution I: the preparation of (two) reagent and additive in polymerization liquid II by hierarchy of control temperature:
To prevent linking agent 0.5 ~ 4 part, 0.1 ~ 0.5 part prevent conglomeration agent, 0.16 ~ 0.46 part of initiator, be dissolved in 10 ~ 30 water, mix, obtain reagent and additive in polymerization liquid II; (3) by 346 parts of acrylate solution I alkali adjusted to ph 12 ~ 12.5, add reagent and additive in polymerization liquid II, be uniformly mixed, under normal temperature, leave standstill 3 ~ 10 hours; (4) separate broken, crushed after being dried.
The alkali wherein neutralizing acrylic acid alkali and adjustment system pH is sodium hydroxide, potassium hydroxide, sodium bicarbonate or sodium carbonate.With gac removing stopper wherein after acrylate solution I obtains.In the preparation of reagent and additive in polymerization liquid II, initiator used is Sodium Persulfate or Potassium Persulphate and S-WAT, sodium bisulfite or Potassium hydrogen sulfite mixture.Wherein Sodium Persulfate and S-WAT mixture are obtained by following methods: be dissolved in by 0.01 ~ 0.1 part of S-WAT in 5 ~ 10 parts of water, and 0.15 ~ 0.36 part of Sodium Persulfate is dissolved in 5 ~ 10 parts of water, then the two is mixed.Prevent linking agent from being urea or EDTA in addition, prevent conglomeration agent from being soap base or sodium stearate.When leaving standstill, poured into by reactant in the vinyl disc of bar shaped lattice, leave standstill 3 ~ 5 hours under normal temperature, then take out bar shaped gel, be broken into small-particle by machine for decomposing and smashing solution, drying and crushing obtains product.Bar shaped lattice vinyl disc is made up of polyvinyl chloride, polypropylene, tetrafluoroethylene, also can replace with the Stainless Steel Disc of plastic lining film.
Compared with prior art, obtained polyacrylate flocculant molecular weight is high, and residual monomer content is low for preparation method of the present invention, and water dissolution performance is good, not conglomeration when dissolving, and deposit the not easily moisture absorption, and gel easily shreds drying.
Embodiment
Following embodiment contributes to those of ordinary skill in the art and understands the present invention further, but does not limit the present invention in any form.
The preparation of embodiment 1 () sodium acrylate solution I:
Get 111kg sodium hydroxide, dissolve in 380kg water, control temperature, below 45 DEG C, is added in 200kg vinylformic acid, is stirred, and control temperature, lower than 35 DEG C, adds 2kg gac wherein, stirs after 2 hours and filters.(2) preparation of reagent and additive in polymerization liquid II:
By urea 2kg, soap base 0.25kg, S-WAT 0.05kg, Sodium Persulfate 0.18kg, be dissolved in 10kg water, stir.(3) by sodium acrylate solution I sodium hydroxide adjusted to ph 12.3, add reagent and additive in polymerization liquid II, be uniformly mixed, pour in the vinyl disc of bar shaped lattice, under normal temperature, leave standstill polyase 13 hour, take out bar shaped gel, become small-particle by machine for decomposing and smashing solution, drying and crushing obtains product.Product viscosity-average molecular weight 3,800 ten thousand, dissolution time 1 hour.
The preparation of embodiment 2 () sodium acrylate solution I:
Get 2.78kg sodium hydroxide, dissolve in 9.51kg water, control temperature, below 45 DEG C, is added in 5kg vinylformic acid, is stirred, and control temperature, lower than 35 DEG C, adds 0.55kg gac wherein, stirs after 2 hours and filters.(2) preparation of reagent and additive in polymerization liquid II:
By urea 0.05kg, soap base 0.007kg, S-WAT 0.0005kg, Sodium Persulfate 0.0045kg, be dissolved in 0.25kg water, stir.(3) by sodium acrylate solution I sodium hydroxide adjusted to ph 12.0, add reagent and additive in polymerization liquid II, be uniformly mixed, pour in the vinyl disc of bar shaped lattice, under normal temperature, leave standstill polymerization 4 hours, take out bar shaped gel, become small-particle by machine for decomposing and smashing solution, drying and crushing obtains product.Product viscosity-average molecular weight 3,200 ten thousand, dissolution time 1 hour.
The preparation of embodiment 3 () sodium acrylate solution I:
Get 55.5g sodium hydroxide, dissolve in 190g water, control temperature, below 45 DEG C, is added in 100g vinylformic acid, is stirred, and control temperature, lower than 35 DEG C, adds 1g gac wherein, stirs after 2 hours and filters.(2) preparation of reagent and additive in polymerization liquid II:
By urea 1.5g, soap base 0.12g, S-WAT 0.01g, Sodium Persulfate 0.1g, be dissolved in 7.5g water, stir.(3) by sodium acrylate solution I sodium hydroxide adjusted to ph 12.5, add reagent and additive in polymerization liquid II, be uniformly mixed, pouring into custom-designedly has in the vinyl disc of bar shaped lattice, polyase 13 hour is left standstill under normal temperature, take out bar shaped gel, become small-particle by machine for decomposing and smashing solution, drying and crushing obtains product.Product viscosity-average molecular weight 3,200 ten thousand, dissolution time 1 hour.
Claims (4)
1. the preparation method of a polyacrylate flocculant, be made up of following steps: the preparation of (one) acrylate solution I: hierarchy of control temperature is lower than 35 DEG C, be 22.6% (weight percent concentration) alkali and the vinylformic acid mixing of 1: 1 by mol ratio, obtain acrylate solution I; (2) preparation of reagent and additive in polymerization liquid II: will prevent linking agent 0.5 ~ 4 weight part, 0.1 ~ 0.5 weight part prevents conglomeration agent, 0.16 ~ 0.46 weight part initiator, is dissolved in 10 ~ 30 weight parts waters, mixes, obtain reagent and additive in polymerization liquid II; (3) by 346 parts by weight propylene acid salt solution I alkali adjusted to ph 12 ~ 12.5, add reagent and additive in polymerization liquid II, be uniformly mixed, under normal temperature, leave standstill 3 ~ 10 hours; (4) separate broken, crushed after being dried; Wherein, the alkali neutralizing acrylic acid alkali and adjustment system pH value is sodium hydroxide, potassium hydroxide, sodium bicarbonate or sodium carbonate; Initiator is Sodium Persulfate or Potassium Persulphate and S-WAT, sodium bisulfite or Potassium hydrogen sulfite mixture; Prevent linking agent from being urea or EDTA; Prevent conglomeration agent from being soap base or sodium stearate.
2. preparation method as claimed in claim 1, is characterized in that acrylate solution I after obtaining with gac removing stopper wherein.
3. preparation method as claimed in claim 1, it is characterized in that Sodium Persulfate and S-WAT mixture are obtained by following methods: be dissolved in by 0.01 ~ 0.1 parts by weight sodium sulfite in 5 ~ 10 weight parts waters, 0.15 ~ 0.36 weight part Sodium Persulfate is dissolved in 5 ~ 10 weight parts waters, then the two is mixed.
4. preparation method as claimed in claim 1, it is characterized in that in the 3rd step standing is having the vinyl disc of bar shaped lattice to carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410207496.XA CN105086309A (en) | 2014-05-16 | 2014-05-16 | Preparation method of polyacrylate flocculant |
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| CN201410207496.XA CN105086309A (en) | 2014-05-16 | 2014-05-16 | Preparation method of polyacrylate flocculant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112111311A (en) * | 2020-09-30 | 2020-12-22 | 桃江县新辉生物质颗粒有限公司 | Biomass granular fuel and preparation method thereof |
| CN114409927A (en) * | 2022-01-24 | 2022-04-29 | 安徽省纳胜生物科技有限公司 | Ten-thousand-ton-grade high-viscosity instant ultrahigh molecular weight sodium polyacrylate and preparation method and application thereof |
| CN115322272A (en) * | 2022-06-27 | 2022-11-11 | 广州工程技术职业学院 | Preparation method of sodium polyacrylate |
-
2014
- 2014-05-16 CN CN201410207496.XA patent/CN105086309A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112111311A (en) * | 2020-09-30 | 2020-12-22 | 桃江县新辉生物质颗粒有限公司 | Biomass granular fuel and preparation method thereof |
| CN114409927A (en) * | 2022-01-24 | 2022-04-29 | 安徽省纳胜生物科技有限公司 | Ten-thousand-ton-grade high-viscosity instant ultrahigh molecular weight sodium polyacrylate and preparation method and application thereof |
| CN115322272A (en) * | 2022-06-27 | 2022-11-11 | 广州工程技术职业学院 | Preparation method of sodium polyacrylate |
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