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Prepn process of pyrazolyl anthranone chloride

A technology of chlorinated pyrazolanthrone and hydrous chlorinated pyrazolanthrone, which is applied in the production process field of chemical products, can solve the problems of high production cost, etc., and achieve good gloss, high yield and strong coloring ability Effect

Inactive Publication Date: 2006-10-18
YANGZHOU RIXING BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, domestic enterprises can only import this dye from abroad, resulting in high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] 1. Preparation:

[0018] Weigh 150kg of 1-aminoanthraquinone, 1050-1500kg of sulfuric acid A with a concentration of 93%, 450-600kg of liquid caustic soda, 300-450kg of sodium metabisulfite, 1050-1500kg of sulfuric acid B, and 225-375kg of sulfuric acid dichloride.

[0019] Second, the reaction steps:

[0020] 1. Put sulfuric acid A in the reaction kettle, raise the temperature to 17°C±5°C, add 1-aminoanthraquinone after stirring for 30 minutes, and control the reaction temperature at 40°C-45°C. After reacting for 5 hours, the reaction was stopped.

[0021] 2. Add liquid caustic soda and sodium pyrosulfite to the above-mentioned diazonium reactant to carry out reduction reaction.

[0022] 3. Add sulfuric acid B to the above reduction reactant to carry out condensation cyclization reaction.

[0023] 4. Take the feed liquid generated by the reaction in step 3 and add sulfuryl dichloride to carry out the chlorination reaction.

[0024] 5. Take the filter cake formed by...

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PUM

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Abstract

The present invention relates to chemical products, and is especially preparation process of pyrazolyl anthranone chloride. Pyrazolyl anthranone chloride is prepared with 1-amino anthraquinone as material and through diazo reaction, reduction, condensation and chlorination. The production process of the present invention has high yield and stable quality, and the produced pyrazolyl anthranone chloride is dark yellow powder, has purity over 98.5 % and is intermediate of producing high grade dye, pigment and other chemical product.

Description

technical field [0001] The invention relates to a production process of chemical products. Background technique [0002] Pyrazole anthrone chloride, also known as 3-chloro-pyrazole anthrone, is a dark yellow powder and is an important intermediate for the production of high-grade dyes, pigments and other chemicals. Strong coloring ability, good gloss and so on. In recent years, with the high-grade requirements of dyes and pigments, some intermediate products with high technical content and good quality performance are urgently needed to support dyes and pigments manufacturers. But at present, domestic enterprises can only import this dye from abroad, resulting in high production costs. Contents of the invention [0003] The object of the present invention is to invent a method for preparing pyrazolanthrone chloride with high content and high purity. [0004] The invention uses 1-aminoanthraquinone as a raw material, and is prepared through diazo, reduction, condensation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D231/54
Inventor 张和戚善龙杨生桂
Owner YANGZHOU RIXING BIO TECH