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Non-phosphorus washing auxiliary detergent and manufacture method thereof

A washing aid and solution technology, applied in the direction of organic washing compositions, etc., can solve the problems of poor magnesium ion exchange capacity, poor biodegradation performance, poor water solubility, etc., and achieve good biodegradation performance, good cleaning performance, high The effect of chelating and dispersing power

Inactive Publication Date: 2013-06-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1970s, the United States developed sodium nitrilotriacetate (NTA) as a substitute for sodium tripolyphosphate (STPP). NTA has three carboxylate groups to make it have a high chelating power, but the dispersion is poor, and NTA has a high chelating ability. Aquatic microorganisms are toxic and may cause cancer [Tenside Surfact.Det.1995;32:225-228], so their use has been banned in the United States and Switzerland
EDTA has good chelating properties, but its disadvantages are similar to NTA, and its biodegradability is not good, so EDTA and NTA have been banned by European ecological organizations from being used in the detergent additive industry [Chin. J. Chem. Eng.2008; 16( 4):517-527]
The second-generation phosphorus-free detergent builders mainly include 4A zeolite [J. Hazard. Mater.2006; 137(1): 401-409], which is characterized by strong calcium ion exchange capacity, non-toxic and harmless, but it is harmful to magnesium ion exchange Poor ability, no dispersibility, and poor water solubility limit its application
Sodium polyacrylate [CN101423577B] and modified sodium polyacrylate [CN101362811], a new generation of high-molecular detergent builders, have good chelating performance, dispersion performance and alkali buffering capacity, but research has found that their biodegradability is poor, and long-term use will cause environmental pollution

Method used

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  • Non-phosphorus washing auxiliary detergent and manufacture method thereof
  • Non-phosphorus washing auxiliary detergent and manufacture method thereof
  • Non-phosphorus washing auxiliary detergent and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In a 250ml four-neck flask equipped with a thermometer, a reflux condenser, a constant pressure dropping funnel, and a stirring magnet, add 0.05mol of itaconic acid and 2mol of deionized water, and slowly add 40% of the mass fraction of the hydroxide under stirring. Sodium solution, adjust the pH of the solution to 4, raise the temperature to 60°C, add 0.0005 mol of sodium tungstate, slowly add 0.06 mol of hydrogen peroxide solution with a concentration of 30%, and adjust the pH of the system with sodium hydroxide to 4- 6. After the dropwise addition, react at 65°C for 2 hours, distill the solution under reduced pressure to 1 / 3 of the original volume to obtain an epoxy sodium itaconate solution, and determine the conversion rate of itaconic acid to be 95% by measuring the epoxy value of the solution. %.

[0039] In a 250ml four-necked flask equipped with a thermometer, a reflux condenser, a constant pressure dropping funnel, and a stirring magnet, add 0.2mol sodium ...

Embodiment 2

[0042] The preparation method of the sodium epoxy itaconate solution and the sodium 2,3-epoxypropanesulfonate solution is the same as in Example 1, and the amount of the substances can be changed at any time according to the monomer ratio.

[0043] Take a sodium epoxy itaconate solution with a monomer content of 0.1mol, heat up to 80°C, add 1.04g of calcium hydroxide, and simultaneously add dropwise a sodium 2,3-epoxypropanesulfonate solution with a monomer content of 0.1mol, After the dropwise addition, use 40% sodium hydroxide solution to adjust the pH of the system to 13.0, react for 6 hours, and cool to obtain a yellow viscous solution. After diluting the solution, it is purified by cation exchange resin, and then neutralized with sodium hydroxide solution get the product. The analysis test shows that the average molecular weight of the polymer is 1300, and the calcium chelating ability is 295.4mgCaCO 3 / g, Calcium Dispersion Power 174.3mgCaCO 3 / g, the biodegradabil...

Embodiment 3

[0045] The preparation method of the sodium epoxy itaconate solution and the sodium 2,3-epoxypropanesulfonate solution is the same as in Example 1, and the amount of the substances can be changed at any time according to the monomer ratio.

[0046] Take a sodium epoxy itaconate solution with a monomer content of 0.2mol, heat up to 100°C, add 1.82g of calcium hydroxide, and simultaneously add dropwise a sodium 2,3-epoxypropanesulfonate solution with a monomer content of 0.05mol, After the dropwise addition, adjust the pH of the system to 13.0 with a sodium hydroxide solution with a mass fraction of 40%, react for 8 hours, and cool to obtain a yellow viscous solution. After the solution is diluted, it is purified with a cation exchange resin, and then neutralized with a sodium hydroxide solution. get the product. The analysis and test obtained the average molecular weight of the polymer is 1200, and the calcium chelating ability is 305.4mgCaCO 3 / g, Calcium Dispersion Power...

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Abstract

The invention discloses non-phosphorus washing auxiliary detergent and a manufacture method of the non-phosphorus washing auxiliary detergent. The non-phosphorus washing auxiliary detergent is a copolymer of epoxy itaconic acid sodium with low molecular weight and 2,3-epoxy propanesulfonic acid sodium. The manufacture method includes that firstly itaconic acid is neutralized through sodium hydroxide solutions to form itaconic acid sodium solutions and then catalyzed and oxidized through sodium tungstate and hydrogen peroxide to produce exopy itaconic acid sodium solutions; secondly epoxy chloropropane and sodium hydrogen sulfite react to produce 3-chrorine-2 hydroxy propanesulfonic acid sodium, and under an alkaline condition, 2,3-epoxy propanesulfonic acid sodium is produced in a cyclized mode; thirdly under the action of the alkaline condition and the catalysts, the epoxy itaconic acid sodium and the 2,3-epoxy propanesulfonic acid sodium carry out cycle opening copolymerization reaction; and ultimately by means of purification of cation exchange resin, the copolymer of the epoxy itaconic acid sodium and the 2,3-epoxy propanesulfonic acid sodium is obtained. The copolymer has good resultant force and dispersion force for calcium ions, has good biodegradability and is efficient and environment-friendly non-phosphorus washing auxiliary detergent.

Description

Technical field [0001] The present invention involves a phosphorus -free washing additive and its preparation methods. It is used as a biodegradable phosphorus -free washing assistant to apply to the detergent industry. Background technique [0002] The washing additive is an important component in the synthetic detergent. During the washing process, the calcium and magnesium ions in the hard water were mainly undertaken to achieve the function of softening water, increasing the ability to disperse dirt and resistance, thereby increasing the surfactant of the surfactant agent.Activity, improve the effect of washing.In general, the washing additives should have good chelating, dispersion, and alkaline buffer ability.After the use of phosphorus -containing detergent additives, biodegradable phosphorus -free washing additives are already the current research focus. [0003] Early phosphorus -free washing additives including sodium carbonate, sodium silicate, and sodium phosphate, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/37C08G65/22C08G65/324
Inventor 郭建维陈少华杨平赵建红
Owner GUANGDONG UNIV OF TECH
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