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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, 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 wastewater treatment cost and creating benefits

Active Publication Date: 2012-12-05
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) Pump 3500L of the extracted H acid mother liquor into a 5000L salting-out pot and start stirring 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. Salt out with 250kg of industrial sodium chloride with a ratio of 99.0%, keep stirring for 1.5 hours, then open the discharge valve at the bottom of the salt out pot and put the material in the salt out pot into the suction filter tank, and use -0.06 The vacuum of MPa carries out suction filtration to the material in the suction filter tank, and obtains 412kg of filter, and sampling chromatographic analysis shows that the content of color-changing acid is 50%, that of H acid is 24%, and that of omega acid is 5%; the resulting fil...

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 organic matter contained in the H acid mother liquor;

[0024] (2) Pump 3000L of the extracted H acid mother liquor into a 5000L salting-out pot and start stirring at the same time at a stirring speed of 50 rpm. Carry out salting-out for 99.0% of 215kg industrial sodium chloride, keep stirring for 1.5 hours, then open the discharge valve at the bottom of the salting-out pot, put the material in the salting-out pot into the suction filter tank, and use -0.06MPa Suction filtration is carried out to the material in the suction filtration tank by a certain vacuum, and 350kg of filtration is obtained. The content of color-changing acid is 51%, H acid 26%, and omega acid 7% acid according to sampling chromatography analysis.

[0025] (3) Add 1,000L of 65°C hot water into the 3,000L dissolving pot and start stirring at the same...

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) Pump 2500L of the extracted H-acid mother liquor into a 5000L salting-out pot and start stirring at the same time at a stirring speed of 50 rpm. Salt out 180kg of 99.0% industrial sodium chloride, keep stirring for 1.5 hours, then open the discharge valve at the bottom of the salting pot and put the material in the salting pot into the suction filter tank, and use -0.06MPa Suction filtration is carried out to the material in the suction filtration tank by a vacuum, the resulting filter is 290kg, the color change is 53% according to the sampling chromatography analysis, the H acid is 24%, the omega acid is 7% acid, and the gained filter is accumulated and stored for subsequent use;

[0033](3) Add 800L of 70°C hot water into the 3000L dissolving pot and st...

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PUM

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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 acid sodium salt, in particular to a process for producing chromotropic acid sodium salt by recycling 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, 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 has complex organic components, and is an organic wastewater with high concentration, high acidity, high salinity and high chroma, and its treatment is difficult. At present, the methods for effectively treating H-acid mother liquor in the industry are mainly to recover inorganic salts by concentration and separate organic matter by extraction. Due to the high energy consumption required to concentrate the H acid mother liquor, the processing cost is relatively high. The main pu...

Claims

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Application Information

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Patent Type & Authority Applications(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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