System for industrial preparation of 2-amino-5-naphtol7-sulfoacid

An amino and industrial technology, applied in the system field of industrial preparation of 2-amino-5-naphthol-7-sulfonic acid, can solve the problems of many impurities in the product, environmental pollution, difficult to control, etc., and achieve high energy utilization rate, select Easy to obtain and short production cycle

Active Publication Date: 2015-09-30
甘肃永鸿染化有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At present, most of the traditional methods are used to prepare J acid in China. The product has many impurities and low yi...

Method used

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  • System for industrial preparation of 2-amino-5-naphtol7-sulfoacid

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Embodiment Construction

[0015] Such as figure 1 A kind of industrial preparation 2-amino-5-naphthol-7-sulfonic acid system shown, this system comprises the first synthesis reaction tower 1, the second synthesis reaction tower 2, hydrolysis reaction tower 3, adjustment reaction tower 4, Dissolution reaction tower 5, suction filtration reaction tower 6, concentration reaction tower 7, third synthesis reaction tower 8, acidification reaction tower 9, centrifugal reaction tower 10, drying reaction tower 11, finished product storage tank 12, sewage treatment system 13, Tuo's Acid liquid storage tank 14, sulfur trioxide gas storage bottle 15, concentrated sulfuric acid liquid storage tank 6, sodium hydroxide solid storage tank 17, hydrochloric acid liquid storage tank 18, pure water storage tank 19; The liquid outlet is connected to the first liquid inlet of the first synthesis reaction tower 1 by the pipeline, the gas outlet of the sulfur trioxide gas storage bottle 15 is connected to the gas inlet of the...

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Abstract

The invention discloses a system for industrial preparation of 2-amino-5-naphtol7-sulfoacid. The system comprises a first synthesis reaction still, a second synthesis reaction still, a hydrolyzation reaction still, a regulation reaction still, a dissolution reaction still, a suction filtration reaction still, a concentration reaction still, a third synthesis reaction still, an acidification reaction still, a centrifugation reaction still, a drying reaction still, a finished product storage tank, a sewage treatment system, a Tobias acid liquid storage tank, a sulfur trioxide gas storage bottle, a concentrated sulfuric acid liquid storage tank, a sodium hydroxide solid storage tank, a hydrochloric acid liquid storage tank and a pure water storage pool. The 2-amino-5-naphtol7-sulfoacid prepared through the system is high in purity, the purity is over 92.8%, the water content is lower than 1%, the crystallizing rate is smaller than 0.5%, and free acid is smaller than 5%.

Description

technical field [0001] The invention relates to a system for industrially preparing 2-amino-5-naphthol-7-sulfonic acid, which belongs to the field of chemical industry. Background technique [0002] J acid is an azo dye intermediate used in the production of wool, silk and cotton dyeing. Since the industrial production, along with the development of the dye industry, great progress has been made in J acid production technology, production scale and application range at home and abroad. The chemical name of J acid is 2-amino-5-naphthol-7-sulfonic acid. Its dry product is off-white powder. It has low solubility in water and is easily soluble in alkali to make corresponding salt. Its sodium salt solution has blue fluorescence . The chlorine-containing compound of J acid is a yellow needle-like crystal, soluble in water, and can be self-coupled into a purple dye in a sodium carbonate solution. This product is mainly used in the preparation of direct dyes, reactive dyes, etc. ...

Claims

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Application Information

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IPC IPC(8): C07C309/50C07C303/32C01B17/69
Inventor 叶光明
Owner 甘肃永鸿染化有限公司
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