Technique for synthesizing improved disperse red 91
A technology for the preparation of disperse red, which is applied in the direction of amino-hydroxyanthraquinone dyes, etc., and can solve the problems that the product quality cannot be recognized.
Active Publication Date: 2008-08-20
JIANGSU YABANG DYE
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Problems solved by technology
However, in actual production, the product quality obtained by this route is often not recognized.
Method used
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[0004] 1. Put 800 kg of hexanediol, 100 kg of OP series emulsifier, 300 kg of disperse red 60, and 150 kg of potassium carbonate into the reactor.
[0005] 2. Heat it to 130-150 degrees, keep it warm for 8 hours, point the board to judge the end point, and start to cool down after the end point is reached.
[0006] 3. Below 60 degrees, start to add 800 kg of methanol (or ethanol) dropwise, and finish adding in 2 hours.
[0007] 4. After adding, press filter, wash to obtain the product, and dry to obtain 300 kg of product.
[0008] 5. The mother liquor reclaims methanol (or ethanol), phenol, and hexanediol respectively.
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The invention relates to the synthesis technique improvement of disperse red 91 which uses the disperse red 60 and hexanediol as raw materials, uses potassium carbonate or potassium hydroxide as an acid binding agent and uses an emulsifier of OP series as a catalyst; after the raw materials are condensed at high temperature to the terminal, the product can be segregated by methanol (or ethanol) when the temperature is cooled, and at last the product is filtrated and separated. The mother liquid is rectified to recycle the methanol (or ethanol), phenol and hexanediol, and the technique improves the product quality.
Description
Technical field: [0001] The invention relates to an improved synthesis process for preparing disperse red 91 (C.I. Disperse Red 91). Background technique: [0002] Disperse Red 91 (C.I.Disperse Red 91) is used for dyeing and printing of polyester and its blended fabrics. It has good light fastness and is widely used in fabric dyeing in high-end places such as automobiles. General information is introduced with 1-aminoanthraquinone bromination , The hydrolyzate is condensed with hexanediol to obtain Disperse Red 91 (C.I.Disperse Red 91). However, in actual production, the product quality obtained by this route is often not recognized. Invention content: [0003] Disperse Red 60 and hexanediol are used as raw materials, potassium carbonate or potassium hydroxide is used as an acid-binding agent, and OP series emulsifiers are used as catalysts. After condensation at high temperature to the end point, the product is separated by methanol (or ethanol) when the temperature is l...
Claims
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Inventor 陈乐文周多刚詹国青张春生殷守华
Owner JIANGSU YABANG DYE