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Low-temperature scouring and bleaching assistant and preparation method and application thereof

A low-temperature bleaching aid, low-temperature technology, applied in bleaching products, textiles and papermaking, etc., can solve the problems of increased sewage discharge, large steam consumption, and difficulty in washing, saving processing time and reducing washing times. , Easy to wash effect

Inactive Publication Date: 2010-09-29
DYMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional pretreatment scouring and bleaching process is carried out in high-temperature and high-pressure equipment at 100°C or even 135°C. The scouring and bleaching time is 60-90 minutes, and a large amount of steam is consumed. 1 ton of cotton textiles requires about 5-6 tons of steam, occupying the entire dyeing process. About 60% of the total steam is used. In addition, the traditional process uses a large amount of caustic soda, which will react with cellulose to form cellulose sodium, which is not easy to wash off from the fiber. It must be washed repeatedly after scouring and bleaching, which consumes a lot of water. Water consumption accounts for about 50% of the entire dyeing and finishing water consumption, and correspondingly increases the discharge of sewage

Method used

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  • Low-temperature scouring and bleaching assistant and preparation method and application thereof
  • Low-temperature scouring and bleaching assistant and preparation method and application thereof
  • Low-temperature scouring and bleaching assistant and preparation method and application thereof

Examples

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specific Embodiment 1

[0037] In this embodiment, pure cotton double-sided knitted gray fabric (32S) is treated at low temperature with low-temperature scouring and bleaching aids.

[0038] The low-temperature scouring and bleaching auxiliary agent described in this embodiment is a mixed auxiliary agent composed of a low-temperature oxygen bleaching activator and a supporting scouring agent, and the above-mentioned two auxiliary agents are respectively composed of the following components by weight percentage:

[0039] 1) Low-temperature oxygen bleaching activator: 60% sodium nonanoylbenzenesulfonate, 5% melamine, 20% sodium percarbonate, and 15% sodium carbonate.

[0040] 2) Supporting scouring agent: isomeric alcohol polyoxyethylene ether 10%, sodium secondary alkyl sulfonate 10%, sodium gluconate 5%, silicone defoamer 0.1%, water 74.9%.

[0041] The C number of the isomeric alcohol polyoxyethylene ether is 13, and its EO number is 7.

[0042]The preparation method of the low-temperature scouring...

specific Embodiment 2

[0053] In this embodiment, the pure cotton knitted double-face gray fabric (20S) is treated at low temperature by low-temperature scouring and bleaching aids.

[0054] The low-temperature scouring and bleaching auxiliary agent described in this embodiment is a mixed auxiliary agent composed of a low-temperature oxygen bleaching activator and a supporting scouring agent, and the above-mentioned two auxiliary agents are respectively composed of the following components by weight percentage:

[0055] 1) Low-temperature oxygen bleaching activator: 40% sodium nonanoylbenzenesulfonate, 20% urea, 30% potassium percarbonate, 10% caustic soda;

[0056] 2) Supporting scouring agent: 15% isomer alcohol polyoxyethylene ether, 10% sodium secondary alkyl sulfonate, 10% sodium gluconate, 0.2% silicone defoamer, 64.8% water.

[0057] The C number of the isomerized alcohol polyoxyethylene ether is 13, and its EO number is 5.

[0058] The preparation method of the low-temperature scouring and ...

specific Embodiment 3

[0069] In this embodiment, the pure cotton knitted double-face gray fabric (40S) is treated at low temperature by low-temperature scouring and bleaching aids.

[0070] The low-temperature scouring and bleaching auxiliary agent described in this embodiment is a mixed auxiliary agent composed of a low-temperature oxygen bleaching activator and a supporting scouring agent, and the above-mentioned two auxiliary agents are respectively composed of the following components by weight percentage:

[0071] 1) Low-temperature oxygen bleaching activator: 50% sodium nonanoylbenzenesulfonate, 20% dicyandiamide, 10% sodium percarbonate, 20% caustic soda;

[0072] 2) Supporting scouring agent: fatty alcohol polyoxyethylene ether 15%, sodium secondary alkylsulfonate 8%, sodium citrate 7%, silicone defoamer 0.3%, water 69.7%.

[0073] The C number of the fatty alcohol polyoxyethylene ether is 10, and its EO number is 7.

[0074] The preparation method of the low-temperature scouring and bleac...

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Abstract

The invention relates to a low-temperature scouring and bleaching assistant and a preparation method and application thereof. The low-temperature scouring and bleaching assistant is a mixed assistant formed by 25-60 percent by weight of low-temperature oxidation bleaching activating agent and 40-75 percent by weight of matched scouring agent, wherein the low-temperature oxidation bleaching activating agent consists of sodium nonanoyloxy benzene sulfonate, an activating agent promoter, a bleaching promoter and ammonium polycarylate; and the matched scouring agent consists of an emulsifying agent, a penetrating agent, a chelated dispersing agent, a defoaming agent and water. Cellulose fiber unfinished textiles treated by the low-temperature scouring and bleaching assistant have better whiteness, capillary effect, strength and hand feeling than the performances of textiles treated by the traditional process. Compared with the traditional method, the invention can effectively save the consumption of steam and power, reduce the treatment pressure of sewage and reduce the treatment expense of the sewage.

Description

technical field [0001] The invention relates to a low-temperature scouring and bleaching auxiliary agent and its preparation method and application, which is suitable for the pretreatment of non-finished cellulose fiber textiles and belongs to the technical field of textile printing and dyeing pretreatment. Background technique [0002] At present, the printing and dyeing auxiliaries industry is facing the severe situation of rising water prices, rising sewage charges, technical barriers to export textiles, domestic processing capacity greater than demand, and intensified competition. The value of energy consumption will be reduced by 20%, and the total discharge of major pollutants will be reduced by 10%. Therefore, printing and dyeing factories mainly focus on reducing energy consumption, reducing processing costs, shortening processing cycles and improving the quality of finished products to enhance their competitiveness. The pretreatment of printing and dyeing is a key ...

Claims

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Application Information

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IPC IPC(8): D06L3/02D06L4/12D06L4/13
Inventor 沈华朱泉郭玉良曹永恒
Owner DYMATIC CHEM
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