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Green environment-friendly fabric after-finishing neutralizer, preparation method and application thereof

A green and environmental-friendly finishing technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of incomplete neutralization of pH value in dyeing bath, rebound of pH value, hard hand feeling, etc., to save dipping time, penetrate fibers well, Neutralizes fast effects

Inactive Publication Date: 2010-11-17
约克夏(广州)食品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, acetic acid or formic acid is generally used as alkali neutralizer in printing and dyeing factories, and reacts with sodium hydroxide to produce sodium acetate or sodium formate salt, which has low solubility and acts as a buffer in the bath, thereby affecting the pH value of the dyeing bath It leads to incomplete neutralization, and it will also be decomposed into alkaline substances during subsequent storage or heat treatment, causing the pH value of the fabric to rebound after a period of storage
In addition, the removal of sodium acetate requires more water, energy and time. If it is not removed, it will lead to a harder hand, and it is not good for the post-processing of the fabric.
In addition, using acetic acid as a neutralizing agent will increase the COD and BOD values ​​in wastewater, increasing the cost of wastewater treatment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Green environment-friendly fabric after-finishing neutralizer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: Inject 20 kilograms of concentrated sulfuric acid in the ceramic reactor with jacket circulating cooling water device, then slowly add 65 kilograms of urea, because the whole mixing process is exothermic process, must open circulating cooling water device cooling, control The temperature of the mixture does not exceed 60°C. After the urea is added, slowly add 15 kg of soft water, that is, deionized water after removing calcium and magnesium ions in tap water, and control the temperature of the mixture not to exceed 50°C. After all the materials are added , stop cooling, and continue to stir for 9 hours to make it. The green environmental protection fabric finishing neutralizer is used for fabrics after scouring, bleaching, dyeing, mercerizing, alkali reduction, stripping and other processes in the printing and dyeing industry. Removal of sodium hydroxide from cellulose fibers of textiles.

Embodiment 2

[0010] Embodiment 2: Inject 7 kilograms of concentrated sulfuric acid in the glass reactor with jacket circulating cooling water device, then slowly add 63 kilograms of urea, because the whole mixing process is exothermic process, must open circulating cooling water device cooling, control The temperature of the mixture does not exceed 70°C. After the urea is added, slowly add 30 kg of soft water, that is, deionized water after removing calcium and magnesium ions in tap water, and control the temperature of the mixture not to exceed 60°C. After all the materials are added , stop cooling, and continue to stir for 6 hours to make it. The green environmental protection fabric finishing neutralizer is used for fabrics after scouring, bleaching, dyeing, mercerizing, alkali reduction, stripping and other processes in the printing and dyeing industry. To the removal of the sodium hydroxide on the fabric cellulose fiber, all the other are with embodiment 1.

Embodiment 3

[0011] Embodiment 3: inject 81 kilograms of concentrated sulfuric acid in the ceramic reactor with jacket circulating cooling water device, then slowly add 16 kilograms of urea in the reactor, because the whole mixing process is an exothermic process, the circulating cooling water must be opened Cool the device and control the temperature of the mixture to not exceed 62°C. After the urea is added, slowly add 3 kg of soft water to the reactor to control the temperature of the mixture to not exceed 52°C. After all the materials are added, stop cooling and continue stirring for 4 hours Make conforming product, all the other are with embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a green environment-friendly fabric after-finishing neutralizer, a preparation method and an application thereof. Each 100 parts by weight of green environment-friendly fabric after-finishing neutralizer comprises the following components in parts by weight: 5.0-85.0 parts of concentrated sulfuric acid, 5.0-75.0 parts of urea and 0-50.0 parts of soft water. The preparation method comprises the following steps: injecting the concentrated sulfuric acid into a ceramic reactor or a glass reactor with a jacket circulating cooling water device; then, slowly adding the urea; starting the circulating cooling water device for cooling; controlling the mixture temperature not to exceed 100 DEG C; slowly adding the soft water into the reactor after the urea is added; controlling the mixture temperature not to exceed 100 DEG C; stopping cooling after all the materials are added; and continuously stirring for 3-10 hours. The invention is used for removing sodium hydroxide on fabric cellulose fiber, and has the advantages of no need of subsequent cleaning, high neutralizing speed, good fiber permeating effect, safety, high efficiency and the like.

Description

technical field [0001] The invention relates to a neutralizing agent for textiles, in particular to a neutralizing agent for fabric finishing, a preparation method and application thereof. Background technique [0002] In the printing and dyeing industry, scouring, bleaching, dyeing, mercerizing, alkali reduction, stripping and other processes need to use a large amount of caustic soda or soda ash as alkali agent. However, after the fabric is processed by these processes, sodium hydroxide is difficult to remove from the cellulose fiber. removed. At present, acetic acid or formic acid is generally used as alkali neutralizer in printing and dyeing factories, and reacts with sodium hydroxide to produce sodium acetate or sodium formate salt, which has low solubility and acts as a buffer in the bath, thereby affecting the pH value of the dyeing bath It will lead to incomplete neutralization, and it will also be decomposed into alkaline substances during subsequent storage or hea...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/55D06M13/432
Inventor 李峥嵘盖瑞·尼科森
Owner 约克夏(广州)食品有限公司
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