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Low-temperature hydrogen peroxide catalyst as well as preparation method and application thereof

A technology of hydrogen peroxide and catalyst, which is applied in the field of low-temperature hydrogen peroxide catalyst and its preparation, can solve the problems of poor stability and dark color of metal phthalocyanine complexes, and achieve the goals of reducing overall cost, easily obtaining raw materials, and shortening the process flow Effect

Active Publication Date: 2016-05-25
中国纺织科学研究院江南分院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal phthalocyanine complexes have problems such as darker color and poor stability

Method used

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  • Low-temperature hydrogen peroxide catalyst as well as preparation method and application thereof
  • Low-temperature hydrogen peroxide catalyst as well as preparation method and application thereof
  • Low-temperature hydrogen peroxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0031] (1) Weigh 8.00g of chitosan in a 1000mL three-necked flask, add 480mL of deionized water and stir, slowly add 160mL of 5% acetic acid aqueous solution, and after the chitosan is completely dissolved, drop 160mL of 0.80g of anhydrous copper sulfate into the above-mentioned flask reaction at room temperature for 4 hours to obtain a light lake blue aqueous solution.

[0032] (2) Add 4 mL of 30% H to the above lake blue aqueous solution 2 o 2 , react at 50°C for 4 hours to obtain a dark green aqueous solution, adjust its pH value to 5-6 with a saturated solution of soda ash, then remove the insoluble matter by suction filtration under reduced pressure, and pass the filtrate through a cationic resin column to remove copper ions to obtain a yellow water-soluble chitosan sugar solution.

[0033] (3) Adjust the process parameters of step (3) to obtain a to f.

[0034] a. Heat 100 mL of the above-mentioned water-soluble chitosan solution to 40° C., slowly drop in 10 mL of an ...

preparation Embodiment 2

[0041] (1) Weigh 8.0g of chitosan in a 1000mL three-neck flask, add 320mL of deionized water and stir, slowly add 320mL of 5% acetic acid aqueous solution, after the chitosan is completely dissolved, drop 1.2g of anhydrous copper sulfate in 160mL of the above flask In the reaction at room temperature for 6 hours, a lake blue aqueous solution was obtained.

[0042] (2) Add 4 mL of 30% H to the above lake blue aqueous solution 2 o 2 , react at 40°C for 6 hours to obtain a dark green aqueous solution, adjust its pH value to 5-6 with a saturated solution of soda ash, then remove the insoluble matter by suction filtration under reduced pressure, pass the filtrate through a cationic resin column to remove copper ions, and obtain a yellow water-soluble shell polysaccharide solution.

[0043] (3) Adjust the process parameters of step (3) to obtain a to f.

[0044] a. Heat 100 mL of the above-mentioned water-soluble chitosan solution to 60° C., slowly drop in 10 mL of an aqueous solut...

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Abstract

The invention discloses a low-temperature hydrogen peroxide catalyst as well as a preparation method and application thereof. The low-temperature hydrogen peroxide catalyst has a structure as follows: L1ML2n, wherein L1 is water-soluble chitosan having the molecular weight of 800-2000, M is transition metal, L2 is an auxiliary ligand selected from compounds containing complexing groups, and n is an integer in 0-3; the low-temperature hydrogen peroxide catalyst is applied to the pretreatment process of cotton fabrics; the products treated by the low-temperature hydrogen peroxide catalyst have higher quality level and excellent environmental protection property; the low-temperature hydrogen peroxide catalyst can be used for replacing the pretreatment ways of caustic soda desizing and a great deal of additives adding which are generally used at present, so that the additive dosage and washing times are reduced, and the chemical oxygen demand (COD) value and discharge of wastewater can be reduced.

Description

Technical field: [0001] The invention relates to a low-temperature hydrogen peroxide catalyst and its preparation method and application, belonging to the technical field of cotton fabric pretreatment technology in the printing and dyeing industry. Background technique: [0002] The pretreatment process of cotton fabrics has traditionally been treated with three-stage process of desizing, scouring and bleaching with high temperature concentrated alkali. The water consumption of this process accounts for 75% of the total water consumption of printing and dyeing processing, and the COD and pollution load produced account for 75%. Not only the loss of fabric strength is serious, the process route is long, the energy consumption is large, the production cost is high, and the environmental pollution is serious. [0003] In order to solve the above problems, it is imperative to reduce the fabric pretreatment conditions. Adding an activator or catalyst to the hydrogen peroxide wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16D06M15/03D06M11/50D06M11/60D06M101/06
CPCB01J31/1691B01J2531/16D06M11/50D06M11/60D06M15/03D06M2101/06
Inventor 李俊玲许增慧严燕钫
Owner 中国纺织科学研究院江南分院
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