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Alkali-resistant phosphorus-free chelating agent for pretreatment of cotton knitted fabric, and preparation method thereof

A chelating agent, alkali-resistant technology, applied in fiber treatment, textile and papermaking, plant fiber, etc., can solve the problems of limited sewage discharge, difficult to remove, unfriendly usage scenarios, etc., to achieve automatic control of production and sewage discharge. The effect of reducing the limit and reducing the cost of sewage treatment

Pending Publication Date: 2022-02-25
DUPLUS CHEM OF ZHANGJIAGANG CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although phosphorus pentoxide and phosphorus trichloride are not poisonous products, they are dangerous goods, and there are unsafe factors in their transportation and use
Disadvantages: The generated sewage contains a large amount of P, which is difficult to remove and the sewage discharge is limited
[0004] In order to solve the pollution problem, a common solution currently on the market is to use a chelating dispersant obtained from an acrylic acid / maleic anhydride copolymer, but this chelating dispersant will lose its chelating effect under high-temperature and high-alkaline conditions. The chelating ability decreased sharply, and the chelating ability could not be improved even if the dosage of ordinary chelating dispersant was increased
[0005] The Chinese patent with the publication number CN1923350A discloses a phosphorus-free alkali-resistant high-efficiency chelating dispersion stabilizer and its preparation method and application. The weight percentage of each composition is: polymer 60-95, alkyl polyglycoside hydrolyzate 5-10, water 0-30, the chelated Ca2+ value of the product is ≥150mg / g, and the dispersion value is ≥100mg / g. Chelate Fe3+≥800mg / g, the molecular weight of the polymer produced by this technical scheme is 500-2000, and does not contain "phosphorus", and no dangerous chemicals are used in the production process, strong alkali resistance, biodegradation Good performance, but this technical solution also has certain problems. The product prepared by this technical solution contains dodecanethiol, and its final product will have a strong odor, which is very unfriendly to daily use scenarios. At the same time The chelating ability of the product to Ca2+ is low, and the hard water used in the pretreatment process of the dyeing factory often has a high content of divalent metal ions. The indicators are not very ideal, and in its published patent CN1923350A, it only briefly describes the method of testing whiteness and capillary effect, and does not list the specific values ​​and effects of the test

Method used

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  • Alkali-resistant phosphorus-free chelating agent for pretreatment of cotton knitted fabric, and preparation method thereof
  • Alkali-resistant phosphorus-free chelating agent for pretreatment of cotton knitted fabric, and preparation method thereof
  • Alkali-resistant phosphorus-free chelating agent for pretreatment of cotton knitted fabric, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: S1, add 60g of water to the beaker to construct the water environment, then add 30g of acrylic acid, 10g of methacrylic acid, 10g of sodium methacrylate, 10g of sodium 2-acrylamido-2-methylpropanesulfonate, Stir to dissolve evenly, transfer to No. 1 dropping funnel for later use;

[0033] S2, add 12 parts of water in another beaker to build water environment, 3.5g inorganic peroxide initiator, stirring and dissolving evenly, transfer to No. 2 dropping funnel for subsequent use;

[0034] S3. Add 10g of maleic anhydride and 5g of methallyl polyoxyethylene ether (HPEG-2400 for short, n=60-75) into a 500ML four-neck flask, then raise the temperature to 80°C and keep the temperature and add 50g of water to build a water environment , and then drop the solution in No. 1 dropping funnel and No. 2 dropping funnel respectively, and control the temperature at 80±2°C. The dropping time was controlled at 25 minutes, and after the dropping was completed, the temperature ...

Embodiment 2

[0035] Example 2: S1, add 70g of water to the beaker to construct the water environment, then add 10g of acrylic acid, 5g of methacrylic acid, 5g of sodium methacrylsulfonate, 2g of sodium 2-acrylamido-2-methylpropanesulfonate, Stir to dissolve evenly, transfer to No. 1 dropping funnel for later use;

[0036] S2, add 20 parts of water in another beaker to build water environment, 2g inorganic peroxide initiator, stir and dissolve evenly, transfer to the No. 2 dropping funnel for subsequent use;

[0037] S3. Add 5g of maleic anhydride and 10g of acryl polyoxyethylene ether to a 500ML four-neck flask, then raise the temperature to 80°C and keep the temperature, add 50g of water to build a water environment, then add dropwise the solution in No. 1 dropping funnel and 2 The solution in the No. dropping funnel, the temperature is controlled at 80±2°C. The dropping time was controlled at 20 minutes, and after the dropping was completed, the temperature was kept for 30 minutes, and ...

Embodiment 3

[0038] Example 3: S1, add 50g of water to the beaker to construct the water environment, then add 40g of acrylic acid, 20g of methacrylic acid, 20g of sodium methacrylate, 20g of sodium 2-acrylamido-2-methylpropanesulfonate, Stir to dissolve evenly, transfer to No. 1 dropping funnel for later use;

[0039] S2, add 10 parts of water in another beaker to build water environment, 5g inorganic peroxide initiator, stir and dissolve evenly, transfer to the No. 2 dropping funnel for subsequent use;

[0040] S3. Add 20g of maleic anhydride and 10g of acryl polyoxyethylene ether to a 500ML four-necked flask, then raise the temperature to 80°C and keep the temperature, add 40g of water to build a water environment, then add dropwise the solution in No. 1 dropping funnel and 2 The solution in the No. dropping funnel, the temperature is controlled at 80±2°C. The dropping time was controlled at 30 minutes, and after the dropping was completed, the temperature was kept for 30 minutes, and ...

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Abstract

The invention discloses an alkali-resistant phosphorus-free chelating agent for pretreatment of a cotton knitted fabric, and a preparation method thereof. The alkali-resistant phosphorus-free chelating agent comprises the following components: 10 to 40 parts of acrylic acid; 5 to 20 parts of maleic anhydride; 5 to 20 parts of methacrylic acid; 2 to 5 parts of an initiator; 5 to 10 parts of hydrophilic polyether containing double bonds at the tail end; 2 to 20 parts of sodium 2-acrylamido-2-methyl propanesulfonate; 5 to 15 parts of sodium methallyl sulfonate; and 100 to 150 parts of water. The alkali-resistant phosphorus-free chelating agent for pretreatment of the cotton knitted fabric has the advantages that the raw material components and the finished product of the alkali-resistant phosphorus-free chelating agent for pretreatment of the cotton knitted fabric do not contain phosphorus, the sewage discharge limitation is greatly reduced, the sewage treatment cost is greatly reduced compared with that of a traditional phosphorus-containing product, besides being used under conventional conditions, the chelating agent is more suitable for chelating dispersion under high-temperature and high-alkali conditions, and the chelating performance is not reduced but is greatly improved under high-temperature and high-alkali (3-7 g / L) conditions.

Description

technical field [0001] The invention relates to the field of chelating agents for pretreatment of overflow dyeing machine cotton fabrics, in particular to an alkali-resistant phosphorus-free chelating agent for pretreatment of cotton knitted fabrics and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, environmental pollution has increasingly threatened the ecological balance and the living environment of human beings. This serious problem has attracted widespread attention from all over the world, and measures have been taken to formulate corresponding laws and regulations. In order to prevent further deterioration of the ecology. For textiles, various countries have successively issued textile eco-labels and environmental regulations, such as: Oeko-Tex100, ISO14000 series standards, etc. In the impact of textiles on the environment, textile printing and dyeing auxiliaries have far more impact on the ecology t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F228/02C08F220/58C08F222/06D06M15/285D06M15/263D06M15/53D06M101/06
CPCC08F283/065D06M15/285D06M15/263D06M15/53D06M2101/06C08F220/06C08F228/02C08F220/585C08F222/06
Inventor 陈金辉王宇飞方玉琦刘佳张春花吴玉春
Owner DUPLUS CHEM OF ZHANGJIAGANG CITY
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