Direct everbright fast orange GGL pollution-free preparation process

A preparation process, pollution-free technology, applied in the preparation of azo dyes, azo dyes, organic dyes, etc., can solve the problem of high processing costs, achieve the effects of increased yield, reduced raw material costs, and simplified procedures

Inactive Publication Date: 2009-06-03
TIANJIN YADONG CHEM & DYESTUFF FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional process needs to add a large amount of sodium chloride to precipitate it from the solution, and then separate the color paste from the colored saline wastewater through filtration, beat the paste with water

Method used

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  • Direct everbright fast orange GGL pollution-free preparation process
  • Direct everbright fast orange GGL pollution-free preparation process

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Embodiment Construction

[0018] In the following, in conjunction with the accompanying drawings and preferred embodiments, the specific implementation and features provided according to the present invention are described in detail as follows:

[0019] Such as figure 2 As shown, a direct light fast orange GGL non-polluting preparation process is characterized in that the implementation steps include:

[0020] (1) Condensation:

[0021] In the condensation reactor, first add 23500L-24000L of water, then add 1290kg of p-aminoazobenzene-4-sulfonic acid with a purity of 100% and 4-4'-dinitrostilbene-2 ​​with a purity of 100%. 790kg of -2'-disulfonic acid, stirring and beating for 30-40 minutes, then slowly add sodium hydroxide in batches to adjust the pH=7.5-8, then add 800Kg of sodium hydroxide, open the steam inlet valve for 1 to 1.5 hours The internal temperature is raised rapidly to t=100~102℃, pH=13~13.5 detected with acidity meter, and the temperature is controlled to continue stirring for 12~12.5 hours...

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Abstract

The invention relates to a direct everbright fast orange GGL pollution-free preparation process, comprising the steps as follows: (1) condensation: 23500L-24000L of water, 1290kg of p-amino-azo-benzene-4-sulfoacid with the purity of 100%, and 790kg of 4-4'-binitro diphenylethyllene-2-2'-disulfonic acid with the purity of 100% are sequentially added into a condensation reaction kettle to stir and pulp for 30-40min; sodium hydroxide is slowly added in batches to adjust pH value to 7.5-8 and then 800kg of sodium hydroxide is added; steam intake valve is opened, the temperature is increased to 100-102 DEG C within 1-1.5h when the detected pH value reaches 13-13.5, and stirring is continued for 12-12.5h at the temperature; (2) preparation of glucose solution; (3) reduction: the glucose solution is added into the condensation reactant; (4) drying. The process simplifies the working procedures and shortens the reaction cycle; raw stock direct spraying method is employed to achieve zero draining of waste water produced by the process; compared with the traditional process, the productivity is greatly improved; and the process is not only energy-efficient but also beneficial to environmental protection as the pollution to the environment is reduced.

Description

Technical field [0001] The invention relates to a direct dye production process, in particular to a pollution-free preparation process of direct light fast orange GGL. Background technique [0002] At present, China is one of the largest dye-producing countries in the world and a major exporter of textiles. At present, most of the products in my country's dye industry are azo dyes. However, the production technology of chlorinated dyes and their intermediates is facing a huge impact and has to change from the current "environmentally polluting" production process to a "safe and clean" production process. [0003] In the traditional dye production process, most of the reduced materials are salted out and filtered to obtain a filter cake, which is then beaten and dried. The waste liquid produced by filtration in this process contains a large amount of harmful substances such as salt, acid, alkali, etc., which seriously pollutes the environment. Therefore, the waste liquid must be t...

Claims

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Application Information

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IPC IPC(8): C09B43/00
Inventor 张超水
Owner TIANJIN YADONG CHEM & DYESTUFF FACTORY
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