Method for preparing 2, 5-diphenyl amino acid DATA

A technology based on terephthalic acid and diphenylamine, which is applied in the preparation of 2, can solve the problems of difficult hydrolysis and oxidation reactions, low product purity, low production efficiency, etc., and achieves easy separation, purification and recycling, high product purity, The effect of high production efficiency
CN101823978AInactive Publication Date: 2010-09-08淮安苏瑞精细化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
淮安苏瑞精细化工有限公司
Publication Date
2010-09-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing 2, 5-diphenyl amino acid DATA, which adopts DMSS and aniline as raw materials, and comprises the following steps: (1) mixing of ingredients; (2) heating and dissolution; (3) condensation reaction; (4) oxydrolysis; (5) separation of solid and liquid; (6) adsorption and decontamination; (7) separation of solid and liquid; (8) neutralization and acidification; (9) separation of solid and liquid; (10) washing and dehydration; (11) drying; (12) crushing and package; and the product 2, 5-diphenyl amino acid DATA is obtained through the above steps. The method has the advantages of reasonable process, high product purity, stable quality, high yield and safe and reliable reaction process.
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Description

technical field

[0001] The invention relates to a compound for preparing organic pigments, which is an important intermediate for the manufacture of quinacridone series organic pigments. The method for preparing 2,5-diphenylamino-terephthalylene DATA through condensation reaction, hydrolysis oxidation reaction and neutralization acidification reaction as raw materials, dimethyl ester DMSS and aniline AN, belongs to the technical field of fine chemical industry. Background technique

[0002] Quinacridone pigments are a very important class of high-grade organic pigments, with excellent light fastness, heat fastness, and non-migration in various plastics, so they are widely used in high-grade coatings, engineering plastics, It is also used in the coloring of resin, pigment printing, ink and rubber, and also in the coloring of synthetic fibers, and has broad application prospects.

[0003] 2,5-di-anilino-3,6-dihydro-terephthalic acid dimethyl ester, (2,5-di-anilino-3,6-dihydro...

Claims

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