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Cotton fabric scouring and bleaching processes by using heavy metal ions and polyphosphates as catalyst

A technology of heavy metal ions and polyphosphate, which is applied in the field of scouring and bleaching of cotton fabrics, can solve the problems of difficult catalyst synthesis, poor product stability, and low output rate, and achieve the effects of product stability, whiteness improvement, and high performance

Active Publication Date: 2013-09-04
DYMATIC CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of catalyst has defects such as difficult synthesis, low output rate, and poor product stability.

Method used

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  • Cotton fabric scouring and bleaching processes by using heavy metal ions and polyphosphates as catalyst
  • Cotton fabric scouring and bleaching processes by using heavy metal ions and polyphosphates as catalyst
  • Cotton fabric scouring and bleaching processes by using heavy metal ions and polyphosphates as catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Catalyst preparation:

[0040] Catalyst A:

[0041] CuSO 4 ·5H 2 O 0.78 g

[0042] Chelating agent 30.00g

[0043] High Concentration Scouring Agent DM-1361 15.00g

[0044] NaOH 0.25g

[0045] Add deionized water to make up to 100 g.

[0046] Fabric: 18.3tex combed cotton double-sided knitted fabric (gram weight 180g / m 2 , Guangzhou Meiming Textile Co., Ltd. weaving)

[0047] Practicing and bleaching process:

[0048] Catalyst A 2.0g / L

[0049] NaOH 2.0g / L

[0050] 30%H 2 o 2 5.0-7.0g / L

[0051] The bath ratio is 1:10, the temperature is raised to 80°C at 2°C / min, the temperature is kept for 45 minutes, the liquid is drained, and the water is washed at 80°C for 10 minutes.

[0052] Wash in cold water, spin, and line dry.

Embodiment 2

[0054] Catalyst preparation:

[0055] Catalyst B:

[0056] CuSO 4 ·5H 2 O 1.56 g

[0057] Chelating agent 60.00g

[0058] NaOH 16.00g

[0059] Add deionized water to make up to 100 g.

[0060] Fabric: 18.3tex combed cotton double-sided knitted fabric (gram weight 180g / m 2, Guangzhou Meiming Textile Co., Ltd. weaving)

[0061] Practicing and bleaching process:

[0062] High concentration scouring agent 0.3g / L

[0063] Catalyst B 1.0g / L

[0064] NaOH 2.0g / L

[0065] 30%H 2 o 2 5.0-7.0g / L

[0066] The bath ratio is 1:10, the temperature is raised to 80°C at 2°C / min, the temperature is kept for 45min, the liquid is drained, the water is washed at 80°C for 10 minutes, washed in cold water, dehydrated, and dried in the air.

[0067] Comparative embodiment and effect:

[0068] Below by the comparative experiment of the present invention and high-temperature scouring and bleaching, activator scouring and bleaching process, and the effect after dyeing a...

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Abstract

The invention provides a catalyst for cotton fabric scouring and bleaching processes and the scouring and bleaching processes, and particularly provides cotton fabric scouring and bleaching processes by using heavy metal ions and polyphosphates as a catalyst. The catalyst for H2O2 low-temperature scouring and bleaching is prepared by mixing Cu<2+> and a chelating agent (polyphosphate compounds) in a certain ratio, at a low temperature, a metal complex formed by Cu<2+> and the polyphosphate compounds can effectively promote decomposition of H2O2, so that the whiteness can be substantially improved, and further the capillary effect can also be considerably improved. The complex can be used as the catalyst and is used for the cotton fabric low-temperature scouring and bleaching processes, and can exert application effects that low-temperature scouring and bleaching processes by using activators and traditional high-temperature processes have. At the same time, the catalyst has the characteristics of simple preparation, stable products, efficient performance and the like.

Description

technical field [0001] The invention relates to a catalyst for the scouring and bleaching process of cotton fabrics and a scouring and bleaching process, in particular to a cotton fabric scouring and bleaching process using heavy metal ions and polyphosphate as catalysts. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) There are many complicated reactions in the process of bleaching and bleaching. There is no clear conclusion on the principle of bleaching. At present, there are two theories that can explain the process of hydrogen peroxide bleaching. One theory is that in the alkaline working solution, H 2 o 2 with OH - Hydrogen peroxide anion (HOO - ), HOO - It has a strong oxidation-reduction potential and is the main active substance of bleaching. Another theory is the free radical theory. Hydrogen peroxide generates HO and HOO free radicals in alkaline working fluids. Free radicals have strong activity and can effectively Decomposes pigments and acts as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/02D06L4/12D06L4/13
Inventor 朱泉王深喜李世琪
Owner DYMATIC CHEM
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