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Process utilizing H acid mother liquor to recover and produce chromotropic acid sodium salt

A color-changing acid and acid mother technology, which is applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of high processing cost, large energy consumption, complex organic content, etc., and achieve the effect of reducing the cost of wastewater treatment and creating benefits

Active Publication Date: 2013-12-18
CHUYUAN HIGH NEW TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to: provide a kind of production step is simple, effect is good, efficient is high, needs a large amount of energy consumption to solve existing concentration method processing H acid mother liquor, causes processing cost height, and the organic component content that extraction separation method separates is complicated, The process of using H acid mother liquor to recycle and produce chromotropic acid sodium salt has not been well reused

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) First, extract the H acid mother liquor according to the conventional process to extract and concentrate the H acid mother liquor, and separate the organic matter contained in the H acid mother liquor;

[0016] (2) 3500L of the extracted H acid mother liquor extract is pumped into the 5000L salting-out pot and the stirring is started at the same time, the stirring speed is 50 rpm, and the quality is divided into three equal parts at room temperature within 2 hours. Perform salting out with 250kg industrial sodium chloride with a ratio of 99.0% and maintain stirring for 1.5 hours, then open the discharge valve at the bottom of the salting out pot and put the materials in the salting out pot into the suction filter tank, at room temperature, use -0.06 The material in the suction filter tank was filtered under a vacuum of MPa to obtain 412kg of filter pack. The chromotropic acid content of sampling and chromatographic analysis was 50%, H acid content was 24%, and omega aci...

Embodiment 2

[0023] (1) First, extract the H acid mother liquor according to the conventional process to extract and concentrate the H acid mother liquor, and separate the H acid mother liquor containing organic matter;

[0024] (2) After extraction, 3000L of the H acid mother liquor extract is pumped into the 5000L salting-out pot and the stirring is started at the same time. The stirring speed is 50 rpm. At room temperature, it is divided into three equal parts and put into mass ratio within 2 hours. Perform salting out with 99.0% 215kg industrial sodium chloride, keep stirring for 1.5 hours, then open the discharge valve at the bottom of the salting out pot and put the materials in the salting out pot into the suction filter tank, at room temperature, use -0.06MPa Vacuum filter the material in the suction filter tank to obtain 350kg of filter composition, sampling chromatographic analysis of the content of chromotropic acid 51%, H acid 26%, omega acid 7% acid, the obtained filter compositio...

Embodiment 3

[0031] (1) First, extract the H acid mother liquor according to the conventional process to extract and concentrate the H acid mother liquor, and separate the organic matter contained in the H acid mother liquor;

[0032] (2) 2500L of the extracted H acid mother liquor extract is pumped into the 5000L salting-out pot and the stirring is started at the same time, the stirring speed is 50 rpm, and the mass ratio is divided into three equal parts at room temperature within 2 hours. Perform salting out with 180kg of 99.0% industrial sodium chloride, keep stirring for 1.5 hours, then open the discharge valve at the bottom of the salting out pot and put the materials in the salting out pot into the suction filter tank, at room temperature, use -0.06MPa Vacuum filter the materials in the suction filter tank, the resulting filter composition is 290kg, sampling chromatographic analysis is 53%, H acid 24%, omega acid 7% acid, the obtained filter composition is accumulated and stored for use...

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Abstract

The invention relates to a process utilizing H acid mother liquor to recover and produce chromotropic acid sodium salt, belonging to the technical field of organic chemistry. The process comprises the following steps of utilizing the H acid mother liquor for extracting and concentrating and separating organic matters; and adding sulfuric acid and hot water into a high-pressure hydrolyzing reactor for high-pressure hydrolyzing, then carrying out segregation, suction filtration, washing and drying, and finally obtaining a chromotropic acid sodium salt finished-product. With the adoption of the process, the organic components in the H acid mother liquor are recovered, the multiple components are successfully changed into single-component chromotropic acid through a chemical process, and the color spectrum and the chemical content are more than 96 percent. The extract liquor of the H acid mother liquor in the prior art cannot be recovered, and the organic matters can be processed only through high-temperature incineration. Compared with the prior art, the method has the advantages that the wastewater treatment cost is reduced, the abandoned pollutants are recycled, and the benefit is created.

Description

Technical field [0001] The invention relates to a process for producing chromotropic sodium salt, in particular to a process for recovering and producing chromotropic sodium salt by using H acid mother liquor. Background technique [0002] H acid (1-amino-8-naphthol-3,6-disulfonic acid) is a special intermediate for the manufacture of dyes, which is widely used in printing and dyeing, textile, chemical and other industries. The large amount of H acid mother liquor produced in the production process of H acid contains complex organic components. It is an organic wastewater with high concentration, high acidity, high salinity and high color, and its treatment is difficult. At present, the effective treatment of H acid mother liquor in the industry is mainly to use concentration method to recover inorganic salt and extraction method to separate organic matter. Since the concentration of H acid mother liquor requires a lot of energy, the processing cost is high. The main purpose of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/43C07C303/32
Inventor 杨鹏廖杰夏协兵陈红兵
Owner CHUYUAN HIGH NEW TECH GRP
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