CN104151460A - Sodium polyacrylate for detergent and preparation method thereof - Google Patents
Sodium polyacrylate for detergent and preparation method thereof Download PDFInfo
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- CN104151460A CN104151460A CN201410413023.5A CN201410413023A CN104151460A CN 104151460 A CN104151460 A CN 104151460A CN 201410413023 A CN201410413023 A CN 201410413023A CN 104151460 A CN104151460 A CN 104151460A
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- sodium polyacrylate
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Abstract
The invention provides sodium polyacrylate for detergent and a preparation method thereof. The provided production method of sodium polyacrylate with a small molecular weight for detergent adopts a characteristic molecular weight adjusting agent and a novel solvent-adding synthesis method. The synthesis technology has the advantages of high conversion rate, little equipment investment, high product purity, no sewage or waste gas discharge, and environment-friendliness. The synthesized product has the advantages of high solid content, narrow molecular weight distribution, and excellent chelating force, dispersion force, and anti-acid performance. The sodium polyacrylate can totally or partially replace the sodium tripolyphosphate in detergent and reduces the environmental pollution caused by the detergent.
Description
Technical field
The present invention relates to a kind of detergent use sodium polyacrylate and preparation method thereof.
Background technology
In synthetic detergent, typically use phosphoric acid salt (as tri-polyphosphate) and aluminium salt (as sodium aluminium silicate, 4A zeolite, kaolin, wilkinite Tai-Ace S 150) as washing assistant, use phosphoric acid salt as washing assistant, its washes can make algae class, the abnormal breeding of waterplant very fast dead after entering lake, river, the dirt and the anoxic that cause water quality, give environment.
With sodium polyacrylate, as washing assistant, be to manufacture the comparatively desirable method of nontoxic, pollution-free washing composition.Sodium polyacrylate is a kind of new functional macromolecule material and important Chemicals, is a kind of tensio-active agent with multiple property.The sodium polyacrylate of different molecular weight can be used in different fields, and low-molecular-weight sodium polyacrylate is mainly the effect disperseing, and is widely used in washing composition and water treatment field.The sodium polyacrylate of using as washing auxiliary detergent has following characteristics: metal ion is had sequestering action, plays alkaline shock absorption, even if there are a small amount of acidic substance to exist, due to the effect of washing assistant, can there is not noticeable change in the pH value of washings, still have very strong soil-removing action yet; Have the dirt of making disperses and prevents that dirt is to fabric adventitious deposit effect again in water, sodium polyacrylate has a large amount of carboxylate group on side chain, therefore there are very strong particle sequestering power and the ability of softening of water, can replace wholly or in part tri-polyphosphate and aluminium salt as detergent builders.
Key prepared by low-molecular-weight sodium polyacrylate is how to regulate its molecular weight and molecualr weight distribution, traditional technology is to adopt alcohols to be used as molecular weight regulator mostly, wherein the most frequently used is Virahol, for example US Patent No. 4301266 provides a kind of preparation method of low-molecular weight water-soluble acrylic or methacrylic acid polymer, in the method, adopting Virahol is solvent or molecular weight regulator, after reaction finishes, need to distill out unnecessary Virahol, therefore the energy consumption of this synthesis mode is very high; Also have and adopt as Cu
2+metal-salt, for example US Patent No. 4314044 provides a kind of preparation method of the low-molecular weight water-soluble acrylate copolymer that comprises metal-salt and initiator, the temperature that the method needs is higher, and metal ion easily causes environmental pollution; Adopt in addition S-WAT to make chain-transfer agent and prepare sodium polyacrylate, Chinese patent CN101423577A for example, the solid content of sodium polyacrylate prepared by this method is on the low side, and molecular weight distribution is wider, the scourability of impact in cleaning product.
Summary of the invention
The present invention solves the aforementioned problems in the prior proposition.
The invention provides a kind of preparation method of detergent use sodium polyacrylate.
The present invention also provides the detergent use of being prepared by above-mentioned preparation method sodium polyacrylate.
For achieving the above object, the present invention is by the following technical solutions:
First aspect of the present invention is to provide a kind of preparation method of detergent use sodium polyacrylate, it is characterized in that, the method comprises the steps:
Step 1, step of reaction: in container, add deionized water, molecular weight regulator, initiator, Acrylic Acid Monomer, be warming up to 70 ℃-90 ℃;
Step 2, holding stage: isothermal reaction at least 1 hour;
Step 3, neutralization stage: be finally cooled to 50 ℃ of left and right, with sodium hydroxide solution, be neutralized to neutrality.
Preferably, in described step 2, the isothermal reaction time is 1-5 hour.
Preferably, in described preparation method, the parts by weight of each component are:
Wherein, described initiator is oxidation-reduction trigger system, comprises Oxidizing and Reducing Agents.
Preferably, the oxygenant of described initiator be selected from ammonium persulphate, Sodium Persulfate, Potassium Persulphate, hydrogen peroxide any one or multiple.
Preferably, the reductive agent of described initiator be selected from hydrosulphite, ferrous salt, xitix any one or multiple.
Preferably, described molecular weight regulator is sodium formiate.
Second aspect of the present invention is to provide a kind of detergent use sodium polyacrylate, it is characterized in that, the molecular weight of described sodium polyacrylate is at 5000-8000, and molecular weight distribution coefficient is at 1.8-2.5.
Preferably, the chelating ability of described sodium polyacrylate is 250-300mg/g CaCO
3, dispersion force is 90-120mg/g CaCO
3, alkali cushion effect is 12-18g.
Preferably, described sodium polyacrylate is prepared by above-mentioned preparation method.
The present invention adopts technique scheme, compared with prior art, has following technique effect:
The production method of a kind of small molecules amount sodium polyacrylate for washing composition provided by the invention, added a kind of feature molecular weight regulator, adopt the synthetic method of non-traditional solubilizing agent, synthesis technique has that transformation efficiency is high, facility investment is few, product purity is high, without advantages such as sewage exhaust gas emission, environmental protection, synthetic product solid content is high, narrow molecular weight distribution, and chelating ability, dispersion force, resistance to acid excellent property, can replace wholly or in part tripoly phosphate sodium STPP for washing composition, reduce the pollution of washing composition to environment.
Simultaneously, the synthesis technique of sodium polyacrylate provided by the invention is all to carry out in the aqueous solution, after end of synthesis, need not distill out unnecessary alkanol molecule amount conditioning agent, in product, do not have alcohols residual yet, production technique is simple, energy consumption is low, plant factor is high, can greatly reduce the cost of traditional mode of production sodium polyacrylate, is applicable to large-scale industrial production.
Embodiment
Below by specific embodiment, the present invention is carried out to detailed and concrete introduction, so that better understand the present invention, but following embodiment does not limit the scope of the invention.
embodiment 1
In reaction vessel, add 11.5kg deionized water, 2kg sodium formiate and 6kg Potassium hydrogen sulfite, warming while stirring to 70 ℃ dropwise added 10kg Acrylic Acid Monomer, 4kg initiator potassium persulfate simultaneously in 2 hours; Be added dropwise to complete rear isothermal reaction 3 hours; Finally with 5kg sodium hydroxide, be neutralized to neutrality.
embodiment 2
In reaction vessel, add 11.5kg deionized water, 2.5kg sodium formiate and 5kg sodium bisulfite, warming while stirring to 75 ℃ dropwise added 10kg Acrylic Acid Monomer, 3kg initiator Sodium Persulfate simultaneously in 3 hours; Be added dropwise to complete rear isothermal reaction 3 hours; Finally with 5kg sodium hydroxide, be neutralized to neutrality.
embodiment 3
In reaction vessel, add 11.5kg deionized water, 3kg sodium formiate and 5kg sodium bisulfite, warming while stirring to 70 ℃ dropwise added 10kg Acrylic Acid Monomer, 3kg initiator ammonium persulfate simultaneously in 2 hours; Be added dropwise to complete rear isothermal reaction 3 hours; Finally with 5kg sodium hydroxide, be neutralized to neutrality.
embodiment 4
In reaction vessel, add 11.5kg deionized water, 2.5kg sodium formiate and 6kg sodium bisulfite, warming while stirring to 80 ℃ dropwise added 10kg Acrylic Acid Monomer, 4kg initiator hydrogen peroxide simultaneously in 2 hours; Be added dropwise to complete rear isothermal reaction 3 hours; Finally with 5kg sodium hydroxide, be neutralized to neutrality.
embodiment 5
In reaction vessel, add 11.5kg deionized water, 2.5kg sodium formiate and 6kg Potassium hydrogen sulfite, warming while stirring to 70 ℃ dropwise added 10kg Acrylic Acid Monomer, 3.5kg initiator ammonium persulfate simultaneously in 2 hours; Be added dropwise to complete rear isothermal reaction 3 hours; Finally with 5kg sodium hydroxide, be neutralized to neutrality.
Performance test
Carry out performance comparison with external Betengent product, ask for an interview table 1 (the physical and chemical performance contrast of each Betengent product) and table 2 (the washing aid performance contrast of each Betengent product), wherein comparative example 1 is Tao Shi Betengent product, and comparative example 2 is BASF Betengent product.
The physical and chemical performance contrast of each Betengent product of table 1
| ? | Molecular weight | Molecular weight distribution coefficient | Solid content (%) |
| Comparative example 1 | 4500 | 3.0 | 38.5 |
| Comparative example 2 | 4000 | 2.9 | 45.1 |
| Embodiment 1 | 6500 | 2.3 | 46.2 |
| Embodiment 2 | 7300 | 2.0 | 46.7 |
| Embodiment 3 | 5600 | 2.1 | 46.1 |
| Embodiment 4 | 5800 | 2.1 | 46.5 |
| Embodiment 5 | 6000 | 2.4 | 45.7 |
The washing aid performance contrast of each Betengent product of table 2
From table 1, table 2, can find out, polyacrylic washing composition of the present invention, than external Tao Shi and BASF Betengent product, narrow molecular weight distribution, solid content are high, and chelating ability, dispersion force, alkaline cushion effect are all higher, have superior washing aid performance.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (9)
1. a preparation method for detergent use sodium polyacrylate, is characterized in that, the method comprises the steps:
Step 1, step of reaction: in container, add deionized water, molecular weight regulator, initiator, Acrylic Acid Monomer, be warming up to 70 ℃-90 ℃;
Step 2, holding stage: isothermal reaction at least 1 hour;
Step 3, neutralization stage: be finally cooled to 50 ℃ of left and right, with sodium hydroxide solution, be neutralized to neutrality.
2. preparation method according to claim 1, is characterized in that, in described step 2, the isothermal reaction time is 1-5 hour.
3. preparation method according to claim 1, is characterized in that, in preparation method, the parts by weight of each component are:
Wherein, described initiator is oxidation-reduction trigger system, comprises Oxidizing and Reducing Agents.
4. preparation method according to claim 3, is characterized in that, the oxygenant of described initiator be selected from ammonium persulphate, Sodium Persulfate, Potassium Persulphate, hydrogen peroxide any one or multiple.
5. preparation method according to claim 3, is characterized in that, the reductive agent of described initiator be selected from hydrosulphite, ferrous salt, xitix any one or multiple.
6. preparation method according to claim 3, is characterized in that, described molecular weight regulator is sodium formiate.
7. a detergent use sodium polyacrylate, is characterized in that, the molecular weight of described sodium polyacrylate is at 5000-8000, and molecular weight distribution coefficient is at 1.8-2.5.
8. detergent use sodium polyacrylate according to claim 7, is characterized in that, the chelating ability of described sodium polyacrylate is 250-300mg/g CaCO
3, dispersion force is 90-120mg/g CaCO
3, alkali cushion effect is 12-18g.
9. detergent use sodium polyacrylate according to claim 7, is characterized in that, described sodium polyacrylate is prepared by preparation method claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413023.5A CN104151460A (en) | 2014-08-20 | 2014-08-20 | Sodium polyacrylate for detergent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413023.5A CN104151460A (en) | 2014-08-20 | 2014-08-20 | Sodium polyacrylate for detergent and preparation method thereof |
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| CN104151460A true CN104151460A (en) | 2014-11-19 |
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| CN201410413023.5A Pending CN104151460A (en) | 2014-08-20 | 2014-08-20 | Sodium polyacrylate for detergent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124640A (en) * | 2022-07-01 | 2022-09-30 | 济源市清源水处理有限公司 | Method for preparing polyacrylic acid solid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423577A (en) * | 2008-12-10 | 2009-05-06 | 娄底市裕德科技有限公司 | Method for preparing polyacrylic acid or sodium polyacrylate |
| CN102863573A (en) * | 2012-10-23 | 2013-01-09 | 四川花语精细化工有限公司 | Preparation method of sodium polyacrylate aqueous solution with high solid content and narrow molecular weight distribution |
| CN103408706A (en) * | 2013-08-19 | 2013-11-27 | 科之杰新材料集团有限公司 | High-performance polycarboxylic acid water reducing agent and preparation method thereof |
-
2014
- 2014-08-20 CN CN201410413023.5A patent/CN104151460A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423577A (en) * | 2008-12-10 | 2009-05-06 | 娄底市裕德科技有限公司 | Method for preparing polyacrylic acid or sodium polyacrylate |
| CN102863573A (en) * | 2012-10-23 | 2013-01-09 | 四川花语精细化工有限公司 | Preparation method of sodium polyacrylate aqueous solution with high solid content and narrow molecular weight distribution |
| CN103408706A (en) * | 2013-08-19 | 2013-11-27 | 科之杰新材料集团有限公司 | High-performance polycarboxylic acid water reducing agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 曹亚峰等: ""双水相中低相对分子质量聚丙烯酸钠"", 《精细石油化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124640A (en) * | 2022-07-01 | 2022-09-30 | 济源市清源水处理有限公司 | Method for preparing polyacrylic acid solid |
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Application publication date: 20141119 |