Method for activated bleaching by using 1,4,7-triazacyclononane complexes

A technology of triazacyclononane and metal complexes, applied in the field of low-temperature activation bleaching, which can solve the problems of immature application and shorten the stacking time

Active Publication Date: 2010-12-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products that have been industrialized on the market are mainly (tetraacetyl) ethylenediamine (TAED) and sodium nonanoylbenzene sulfonate (NOBS). The application of hydrogen peroxide bleaching pretreatment is not very mature

Method used

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  • Method for activated bleaching by using 1,4,7-triazacyclononane complexes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of working solution: Add each additive in turn into a 1000ml container. Dosage of penetrant JFC: 2g / L; dosage of stabilizer MA-AA: 1g / L; activator Fe 2 -(1,4,7-Trimethyl-1,4,7-triazacyclononane)-Cl 2 Dosage: 3μmol / L; 30%H 2 o 2 Dosage: 30g / L; adjust the pH of the working solution to 8, stir evenly to treat the fabric.

[0044] (2) Padding treatment: the pure cotton semi-bleached cloth is soaked twice and rolled twice on a uniform padding machine with the working solution prepared in the above (1), and the liquid-carrying rate is 95%.

[0045] (3) Steaming step: the steaming temperature is 80° C., and the steaming time is 1 hour.

[0046] (4) Water washing: wash the steamed cotton fabric twice with hot water at 50° C. to 80° C., and then fully wash it with cold water.

Embodiment 2

[0048] (1) Preparation of working solution: Add each additive in turn into a 1000ml container. Dosage of penetrant JFC: 2g / L; dosage of stabilizer MA-AA: 1g / L; activator Fe 2-(1,4,7-Trimethyl-1,4,7-triazacyclononane)-Cl 2 Dosage: 15μmol / L; 30%H 2 o 2 Dosage: 30g / L; adjust the pH of the working solution to 9.5, stir evenly to treat the fabric.

[0049] (2) Padding treatment: the pure cotton semi-bleached cloth is soaked twice and rolled twice on a uniform padding machine with the working solution prepared in the above (1), and the liquid-carrying rate is 95%.

[0050] (3) Steaming step: the steaming temperature is 80° C., and the steaming time is 1 hour.

[0051] (4) Water washing: wash the steamed cotton fabric twice with hot water at 50° C. to 80° C., and then fully wash it with cold water.

Embodiment 3

[0053] (1) Preparation of working solution: Add each additive in turn into a 1000ml container. Penetrant JFC dosage: 2g / L; stabilizer MA-AA dosage: 0.5g / L; activator Fe 2 -(1,4,7-Trimethyl-1,4,7-triazacyclononane)-Cl 2 Dosage: 9μmol / L; 30%H 2 o 2 Dosage: 30g / L; adjust the pH of the working solution to 9, stir evenly to treat the fabric.

[0054] (2) Padding treatment: the pure cotton semi-bleached cloth is soaked twice and rolled twice on a uniform padding machine with the working solution prepared in the above (1), and the liquid-carrying rate is 95%.

[0055] (3) Steaming step: the steaming temperature is 80° C., and the steaming time is 1 hour.

[0056] (4) Water washing: wash the steamed cotton fabric twice with hot water at 50° C. to 80° C., and then fully wash it with cold water.

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Abstract

The invention relates to a method for low-temperature activated bleaching by using 1,4,7-triazacyclononane metal complexes, belonging to the field of methods for low-temperature activated bleaching. The method comprises the following steps: (1) taking the 1,4,7-triazacyclononane metal complexes, H2O2, penetrating agents and stabilizing agents and then mixing the substances to obtain bleaching operating fluid with pH value of 7-11; (2) padding the fabrics in the bleaching operating fluid; and (3) carrying out cold pad-batch or steaming on the padded fabrics and then washing the fabrics with water. The method is simple, low in cost, high in production efficiency, environment-friendly, energy-saving and suitable for industrialization and reduces the bleaching temperature, shortens the stacking time and reduces the fabrics damage under the premise of achieving good bleaching effect.

Description

technical field [0001] The invention belongs to the field of low-temperature activated bleaching methods, in particular to a low-temperature activated bleaching method using a 1,4,7-triazacyclononane complex. Background technique [0002] Hydrogen peroxide bleaching is an important process in the pretreatment of textiles. The bleached fabric has high whiteness, no yellowing, and little environmental pollution, so it is widely used in the pretreatment bleaching process of various fabrics. [0003] Conventional hydrogen peroxide bleaching includes: high temperature bleaching and cold pad batch bleaching. [0004] The technological process of high-temperature bleaching is: padding and bleaching solution→steaming→water washing. [0005] The bleach formula is: H 2 o 2 (100%) 2~15g / L, adjust the pH value to 10.5~10.8 with caustic soda, add a proper amount of stabilizer and wetting agent, pad the bleaching solution at room temperature, steam at 95~100°C for 45~60min, and then wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/02D06L4/12D06L4/13
Inventor 张琳萍李改莉毛志平徐红钟毅宋敏尹冲任参李静妍刘艳
Owner DONGHUA UNIV
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