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Protein fiber low temperature neutral reduction bleaching method

A protein fiber, low temperature technology, applied in the field of dyeing and finishing, can solve the problems of high energy consumption, long process time and high production cost, and achieve the effect of avoiding cost increase and good water solubility.

Active Publication Date: 2019-01-11
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the reduction and bleaching of protein fibers needs to be processed under high-temperature alkaline conditions, which not only requires a long process time, high temperature, and low efficiency, but also consumes a lot of energy, causes great damage to protein fibers, and reduces production efficiency. The cost is high, and it does not meet the energy-saving and emission-reduction requirements required by the current printing and dyeing industry. Therefore, a low-temperature neutral reduction bleaching method for protein fibers is provided, which can realize low-temperature neutral energy-saving and emission-reduction dyeing and finishing of protein fibers, especially its excellent Whiteness and Dyeing Performance Requirements

Method used

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  • Protein fiber low temperature neutral reduction bleaching method
  • Protein fiber low temperature neutral reduction bleaching method
  • Protein fiber low temperature neutral reduction bleaching method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for neutral reduction bleaching of protein fibers at low temperature, the steps are as follows:

[0026] (1) Preparation of low-temperature bleaching catalyst: weigh the rare earth chloride and the colorless aromatic compound with relatively simple structure according to the molar ratio of 1:1, put the weighed cerium chloride and o-hydroxybenzoic acid into the Put an appropriate amount of distilled water in an Erlenmeyer flask, heat it to 40°C under ultrasonic conditions, stir it ultrasonically to dissolve it completely, then slowly pour the aqueous solution of cerium chloride into the aqueous solution of o-hydroxybenzoic acid under the condition of ultrasonic 40°C, and ultrasonically After stirring for 10 minutes, add concentrated ammonia water dropwise to adjust the pH of the solution to 10, then continue the ultrasonic stirring reaction for 60 minutes, and let the reacted aqueous solution stand at room temperature for 48 hours, and obtain a solid powder after...

Embodiment 2

[0029] A method for neutral reduction bleaching of protein fibers at low temperature, the steps are as follows:

[0030] (1) Preparation of low-temperature bleaching catalyst: weigh rare earth chlorides and colorless aromatic compounds with relatively simple structures in a molar ratio of 1:2, and weigh ytterbium chloride and lutetium chloride (molar ratio 1:1) ) and m-hydroxybenzoic acid, 1-hydroxyl-2-naphthoic acid (molar ratio 1:1) were respectively placed in conical flasks equipped with appropriate amount of distilled water, heated to 50 °C under ultrasonic conditions, and ultrasonically stirred to make it completely dissolved , and then slowly pour the aqueous solution of ytterbium chloride and lutetium chloride into the aqueous solution of m-hydroxybenzoic acid and 1-hydroxy-2-naphthoic acid under the condition of ultrasonic 60°C, and after ultrasonic stirring for 10 minutes, add concentrated ammonia water dropwise to adjust the solution pH to 12, and then continue the u...

Embodiment 3

[0033] A method for neutral reduction bleaching of protein fibers at low temperature, the steps are as follows:

[0034] (1) Preparation of low-temperature bleaching catalyst: weigh the rare earth chloride and the relatively simple colorless aromatic compound according to the molar ratio of 1:3, and weigh the yttrium chloride, praseodymium chloride, neodymium chloride (mol Ratio 1:1:1) and 3,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid (molar ratio 1:1:1) were placed in a suitable amount of distilled water In a Erlenmeyer flask, heated to 50°C under ultrasonic conditions, ultrasonically stirred to dissolve it completely, and then slowly poured the aqueous solution of yttrium chloride, praseodymium chloride, and neodymium chloride into 3, In the aqueous solution of 5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, and 2,6-dihydroxybenzoic acid, after ultrasonic stirring for 10 minutes, concentrated ammonia water was added dropwise to adjust th...

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Abstract

The invention discloses a protein fiber low temperature neutral reduction bleaching method. According to the protein fiber low temperature neutral reduction bleaching method, a rare earth chloride anda colorless aromatic compound with a relatively simple structure are subjected to complexing at a certain molar ratio so as to obtain a thiourea dioxide low temperature bleaching catalyst, a bleaching solution is prepared from thiourea dioxide and the thiourea dioxide low temperature bleaching catalyst, and bleaching of protein fiber is carried out at low temperature conditions. The protein fiberlow temperature neutral reduction bleaching method is capable of realizing protein fiber low temperature neutral bleaching, bleaching temperature is reduced, energy consumption is reduced, protein fiber damage is avoided, production efficiency is increased, and the obtained dyed protein fiber is excellent in whiteness and dyeing performance.

Description

technical field [0001] The invention belongs to the technical field of dyeing and finishing, and in particular relates to a low-temperature neutral reduction bleaching method for protein fibers. Background technique [0002] Protein fiber is a kind of high-grade fiber fabric that is widely loved by consumers, including natural protein fibers such as wool and silk, as well as regenerated protein fibers such as milk protein fiber, soybean protein fiber, and silkworm chrysalis protein fiber. This type of fiber often needs to be bleached before dyeing. Currently, the commonly used bleaching methods for protein fibers include oxidative bleaching and reductive bleaching. The oxidative bleaching method usually uses hydrogen peroxide for bleaching, and the reductive bleaching method usually uses hydrosulfite or thiourea dioxide for bleaching. Which kind of bleaching method is used needs to be carried out under high-temperature alkaline conditions, which has the disadvantages of pote...

Claims

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Application Information

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IPC IPC(8): D06L4/30
CPCD06L4/30
Inventor 曹机良张海霞贾琳徐李聪王有权
Owner HENAN INST OF ENG
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