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Solar light catalytic bleaching agent and its dipping and bleaching method and rolling bleaching method

A technology of photocatalysis and bleaching agent, applied in the field of textile dyeing and finishing, can solve the problems of difficult to realize industrial application, irritating odor, low stability, etc., and achieve the effect of easy control of process conditions, reliable test data and stable components

Inactive Publication Date: 2006-03-22
李春辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But practice has proved that there are serious shortcomings in this system: industrial peracetic acid is usually obtained by the reaction of acetic anhydride and hydrogen peroxide in the presence of sulfuric acid, which has low stability, pungent smell and can burn the skin; Acetic acid is also potentially explosive, and special containers are required for transportation and storage
Therefore, although the system has been proposed for more than 30 years, it is still difficult to realize industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] Embodiment 1: The solar photocatalytic bleaching agent of the present invention is compounded by ferric sulfate, oxalic acid and hydrogen peroxide in a molar ratio of 1:6:5. Its method of soaking and bleaching includes the following steps:

[0038] a, compounding ferric sulfate, oxalic acid and hydrogen peroxide with a molar ratio of 1:6:5 into the solar photocatalytic bleaching agent;

[0039] b, utilizing the solar photocatalytic bleaching agent to soak and bleach under sunlight to be bleached to contain the cellulose fiber fabric for 60 minutes;

[0040] c, at room temperature, pickling the cellulose fiber fabric to be bleached for 5 minutes in a sulfuric acid cleaning solution with a concentration of 0.3g / l to remove iron ions;

[0041] d. Fully wash with water;

[0042] e. Drying.

Embodiment approach 2

[0043] Embodiment 2: The solar photocatalytic bleaching agent of the present invention is compounded by ferric sulfate, oxalic acid and hydrogen peroxide in a molar ratio of 1:6:5. Its method of rolling and bleaching includes the following steps:

[0044] A, ferric sulfate, oxalic acid and hydrogen peroxide that molar ratio is 1: 6: 5 are compounded into described solar photocatalytic bleaching agent;

[0045] B, utilize described solar photocatalytic bleaching agent to roll and bleach to be bleached and contain cellulose fiber fabric;

[0046] C, the cellulose fiber fabric to be bleached is suspended in sunlight for 60 minutes;

[0047] D, under room temperature, in the sulfuric acid (more than 95% sulfuric acid) cleaning solution that concentration is 0.3g / l, pickling described waiting to bleach contains cellulose fiber fabric 5 minutes, removes iron ion;

[0048] E. Full washing:

[0049] F, drying.

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Abstract

The solar photocatalytic bleaching agent is re-compounded with iron oxalate and hydrogen peroxide solution, and is used in bleaching via the catalysis of sunlight or artificial light. The solar photocatalytic bleaching agent has stable components, easily controlled technological condition, simple compounding process, no influence on fiber and the post steps, and high bleaching quality. Its bleaching process is cold one in low power consumption and low comprehensive cost compared with hydrogen peroxide solution bleaching process. The present invention is suitable for use in various dyeing and finishing enterprises.

Description

technical field [0001] The invention relates to textile dyeing and finishing, in particular to a solar photocatalyzed bleaching agent and its soaking and bleaching usage method and pad bleaching usage method. Background technique [0002] The textile dyeing and finishing industry poses a serious threat to the environment, and has been concerned by the industry, and a lot of research work has been done to seek alternatives to environmentally harmful processing techniques, dyes and auxiliaries. So far, the most common cellulose fiber bleaching systems used in the dyeing and finishing industry around the world are nothing more than the following three: H 2 o 2 / NaOH system, sodium chlorite system and sodium hypochlorite system in acidic medium. There are great limitations in the application of sodium chlorite bleaching technology; and the sodium hypochlorite bleaching system is facing the fate of being eliminated due to serious AOX pollution. h 2 o 2 / NaOH system has no AO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/04D06L3/10D06L4/50D06L4/30
Inventor 李春辉
Owner 李春辉
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