Preparation method of phosphorus-free environmentally-friendly chelating dispersing agent

A chelating dispersant and environmental protection technology, which is applied in the field of preparation of phosphorus-free environmental protection chelating dispersant, can solve problems such as the hardening of the hand of textiles, and achieve the effects of improving environmental friendliness and good comprehensive performance.

Inactive Publication Date: 2019-01-15
湖州南浔维意纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most textile dyeing and finishing processes are carried out in water, and Ca in water 2+ , Mg 2+ 、Cu 2+ , Fe 3+ , Mn 2+ , Zn 2+ Such metal ions are easy to form insoluble metal salts and deposit on fabrics and equipment, making textiles feel hard. More than 50% of the defects in dyeing and finishing processing are caused by poor water quality. In order to ensure the quality of dyeing and finishing fabrics, dyeing and finishing Chelating dispersants are required to be added in the pretreatment and dyeing process of the process. Chelating dispersants have the characteristics of chelating agent dispersants, which can not only chelate metal ions, but also disperse solid flocs or droplets into fine particles. The particles are stably suspended in the liquid. There are many types of chelating dispersants. The core of the preparation of chelating dispersants is the selection and proportioning of various compounds with complexing functions, the mixing sequence and mixing temperature with deionized water, etc. Conditions, but the finished products currently prepared generally cannot take into account both chelating dispersing performance and environmental protection. In order to pursue good chelating ability, many chelating dispersing agents contain organic phosphate, even if there is subsequent dyeing The entire wastewater treatment facility cannot eradicate phosphorus in wastewater, and the discharge of treated wastewater will still cause eutrophication of the water body, which runs counter to the current concept of green environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of preparation method of phosphorus-free environment-friendly chelating dispersant comprises the following steps:

[0019] A. Put 400 parts of deionized water into the reactor as bottom water, then add 35 parts of sodium alginate, 20 parts of polyacrylamide, 0.7 parts of initiator and 0.2 parts of molecular weight regulator into the reactor, blow nitrogen, and stir , dissolved, heated up to 42°C, the stirring speed was 2000r / min, and the stirring time was 32min;

[0020] B. Add 30 parts of hydrolyzed polymaleic anhydride and 0.1 part of molecular weight regulator into the reaction kettle, stir, heat up to 57°C, the stirring speed is 2100r / min, and the stirring time is 18min;

[0021] C. Add 20 parts of polyaspartic acid and 0.1 part of molecular weight regulator into the reactor, stir, cool down to 48°C, the stirring speed is 1600r / min, and the stirring time is 6min;

[0022] D. Add 10 parts of polyepoxysuccinic acid and 0.1 part of molecular weigh...

Embodiment 2

[0033] Embodiment 2: a kind of preparation method of phosphorus-free environment-friendly chelating dispersant comprises the following steps:

[0034] A. Put 400 parts of deionized water into the reactor as bottom water, then add 35 parts of sodium alginate, 20 parts of polyacrylamide, 0.7 parts of initiator and 0.2 parts of molecular weight regulator into the reactor, blow nitrogen, and stir , dissolved, heated up to 44°C, the stirring speed was 2200r / min, and the stirring time was 38min;

[0035] B. Add 30 parts of hydrolyzed polymaleic anhydride and 0.1 part of molecular weight regulator into the reaction kettle, stir, heat up to 60°C, the stirring speed is 2300r / min, and the stirring time is 22min;

[0036] C. Add 20 parts of polyaspartic acid and 0.1 part of molecular weight regulator into the reactor, stir, cool down to 50°C, the stirring speed is 1700r / min, and the stirring time is 8min;

[0037] D. Add 10 parts of polyepoxysuccinic acid and 0.1 part of molecular weigh...

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PUM

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Abstract

The invention discloses a preparation method of a phosphorus-free environmentally-friendly chelating dispersing agent, and the method comprises the following steps: A, placing deionized water as bottom water into a reaction kettle, adding sodium alginate, polyacrylamide, an initiator and a molecular weight regulator to the reaction kettle, introducing nitrogen, stirring, and dissolving; B, addinghydrolyzing polymaleic anhydride and a molecular weight regulator to the reaction kettle, and stirring; C, adding polyaspartic acid and a molecular weight regulator to the reaction kettle, and stirring; D, adding polyepoxysuccinic acid and a molecular weight regulator to the reaction kettle, and stirring; E, allowing a solution obtained in the step D to stand at 70 DEG C for 1.5-2 hours; and F, cooling a solution obtained in the step E to 25 DEGC, adding a sodium hydroxide solution dropwise to the reaction kettle to adjust the pH between 6.0 and 8.0, and filtering to obtain the chelating dispersant. The method has the advantages of being able to improve the environmental friendliness, and the chelating dispersing agent prepared by the method has good comprehensive performance.

Description

technical field [0001] The invention relates to a production process of textile printing and dyeing auxiliaries, in particular to a preparation method of a phosphorus-free environment-friendly chelating dispersant. Background technique [0002] Most textile dyeing and finishing processes are carried out in water, and Ca in water 2+ , Mg 2+ 、Cu 2+ , Fe 3+ , Mn 2+ , Zn 2+ Such metal ions are easy to form insoluble metal salts and deposit on fabrics and equipment, making textiles feel hard. More than 50% of the defects in dyeing and finishing processing are caused by poor water quality. In order to ensure the quality of dyeing and finishing fabrics, dyeing and finishing Chelating dispersants are required to be added in the pretreatment and dyeing process of the process. Chelating dispersants have the characteristics of chelating agent dispersants, which can not only chelate metal ions, but also disperse solid flocs or droplets into fine particles. The particles are stably...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/52D06P1/48D06P1/613
CPCD06P1/48D06P1/525D06P1/5264D06P1/5278D06P1/613
Inventor 沈慧
Owner 湖州南浔维意纺织有限公司
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