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Method for preparing acid blue 260

A technology of acid blue and bromamine acid, applied in chemical instruments and methods, reactive dyes, azo dyes, etc., can solve the problems of many purple sub-dyes, low color yield, large consumption of raw materials, etc., and achieve light fastness Good, increase the conversion rate, reduce the effect of dosage

Inactive Publication Date: 2009-09-23
TIANJIN DEK CHEM
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AI Technical Summary

Problems solved by technology

The defect of the dyeing process with the above-mentioned materials and process method is that the consumption of raw materials is large, the color yield is low, and there are many purple sub-dyes.

Method used

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  • Method for preparing acid blue 260

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Effect test

Embodiment 1

[0032] The preparation method of acid blue 260 dye is described in the following steps:

[0033] a, the dissolution of bromamine acid and mes-trimethylaniline

[0034] to 10m 2 Add 4600 liters of water to the reaction tank, then add 404Kg of bromamine acid and 175.5Kg of mesitidine, stir, heat up to 90-95°C, dissolve the material, clarify, maintain the temperature at 90-95°C, and set aside;

[0035] b. Preparation of catalyst

[0036] Add 9.9Kg of cuprous chloride, 25 liters of water, 42.5 kg of 30% hydrochloric acid into a 200-liter plastic bucket, heat up to 40-42°C, dissolve the material, and set aside;

[0037] c. Condensation reaction

[0038] Add 336Kg of sodium bicarbonate to the bromamine and mesitidine solution prepared in step a, stir and cool down to 70-75°C, add 962Kg of butanol, and then add the catalyst prepared in step b with 5Kg of phosphoric acid Add tributyl ester, stir the reaction, control the reaction temperature at 60-65°C, and use TLC aluminum-based ...

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Abstract

The invention provides a method for preparing acid blue 260, which comprises the following steps: condensing bromamine acid and trimethylaniline, removing auxiliary lac dyes, refining for three times, activating, icing, neutralizing, refining again, drying, adjusting the color and the strength and packaging finished products. The method for preparing acid blue 260 consumes less raw material consumption, has high dye rate, generates less auxiliary lac dyes, improves the yield of the dyes and plays a promotion role in environmental protection.

Description

technical field [0001] The invention relates to a preparation method of acid blue 260 suitable for dyeing wool, cashmere, shrink-proof wool and nylon. Background technique [0002] Acid dyes have the remarkable characteristics of bright color, excellent application performance, convenient use and strong applicability. In the 21st century, due to environmental and ecological constraints and economic factors, the requirements for the production and preparation of acid dyes, color uptake rate, color fixation rate and dyeing wastewater are getting higher and higher. Existing a kind of brilliant blue acid dye, its molecular structural formula is as shown in (I): [0003] [0004] The dye industry calls the dye of the above formula (I) structure Acid Blue 260, and the index number is C.I. Acid Blue 260. At present, the acid blue 260 dye is prepared by using water as a solvent, condensation of bromamine acid and mesitylene, refining, activation, salting out, pressure filtratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/467
Inventor 张兴华邢广文
Owner TIANJIN DEK CHEM
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