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A kind of preparation method of torrentic acid sodium salt

A technology of sodium salt and reaction solution of toburic acid, applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of large dust pollution, insoluble in water, etc., and achieve the effects of reducing pollution, good dissolution effect, and cost saving

Active Publication Date: 2016-01-20
山西翔宇化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention overcomes the deficiencies of the prior art, solves the problems of large dust pollution and poor water solubility of the powder dosage form of torachid acid obtained in the prior art, and provides an environment-friendly preparation method of torachid acid sodium salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0019] 1. Preparation of liquid dosage form of sodium salt of tuburic acid

[0020] A, with 1000kg2-naphthol as starting raw material, carry out low-temperature sulfonation, neutralization reaction and high-pressure amination to obtain reaction solution through traditional technology;

[0021] B. The reaction solution is thermally filtered through a bag filter with a filtration accuracy of 5 μm. After the filtrate is cooled to 60 ° C, under a working pressure of 0.4 MPa, it is desalinated through a nanofiltration membrane of model NF-70 and passed through pure water. The volume is 50L / (m 2 h), after 4.0 hours of circulating osmosis treatment, increase the working pressure to 1.0 MPa, and circulate dehydration for 1.0 hour to obtain a desalted and concentrated reaction solution. In gained reaction solution, add 2.5kg formaldehyde and 4.5kg glycerol, mix uniformly to obtain 5098kg of liquid torrentic acid product, solid content 30.0%, electrical conductivity 338 μ s / cm, pH valu...

Embodiment 2

[0030] Preparation of liquid dosage form of sodium salt of tuburic acid

[0031] A, with 1000Kg2-naphthol as starting raw material, carry out low-temperature sulfonation, neutralization reaction and high-pressure amination to obtain reaction solution through traditional technology;

[0032] B. The reaction solution is thermally filtered through a bag filter with a filtration accuracy of 6m. After the filtrate is cooled to 70°C, under a working pressure of 0.8MPa, it is desalinated through a nanofiltration membrane of model NF-70 and passed through pure water. The volume is 60L / (m 2 h), after 3.0 hours of circulating osmosis treatment, increase the working pressure to 1.2 MPa, and circulate dehydration for 1.0 hour to obtain a desalted and concentrated reaction solution. Add 2.0kg hydrogen peroxide and 5.0kg glycerol in the gained reaction solution, mix uniformly to obtain 6092kg of liquid torrentic acid product, solid content 25.2%, electrical conductivity 287 μ s / cm, pH valu...

Embodiment 3

[0034] Preparation of liquid dosage form of sodium salt of tuburic acid

[0035] A, with 1000kg2-naphthol as starting raw material, carry out low-temperature sulfonation, neutralization reaction and high-pressure amination to obtain reaction solution through traditional technology;

[0036] B. The reaction solution is thermally filtered through a bag filter with a filtration accuracy of 4 μm. After the filtrate is cooled to 42 ° C, under a working pressure of 0.6 MPa, it is desalted through a nanofiltration membrane of model NF-70, and pure water is passed through it. The volume is 50L / (m 2 h), after 4.0 hours of circulating osmosis treatment, increase the working pressure to 1.2 MPa, and circulate dehydration for 1.0 hour to obtain a desalted and concentrated reaction solution. Add 3kg hydrogen peroxide and 5.5kg propylene glycol in gained reaction liquid, mix homogeneously to obtain 5294kg of liquid torrentic acid product, solid content 28.6%, electrical conductivity 301 μ ...

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PUM

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Abstract

The invention relates to a preparation method of sodium tobias salt, particularly relates to a preparation method of an environment-friendly sodium tobias salt product and solves the problems that tobias acid powder obtained through the prior art is large in dust pollution and difficult to be dissolved in water. The preparation method disclosed by the invention is improved based on a conventional tobias acid production process, the steps including acidification, filter pressing, drying and the like are saved after low-temperature sulfonation, neutralization reaction and high-pressure amination reaction of 2-isonaphthol in the conventional process, a high-pressure amination reaction solution is sequentially subjected to the steps including filtration, percolation, concentration and the like, and a small amount of a sterilizing agent and an anti-freezing agent are added to obtain a liquid sodium tobias salt product which can be stably stored for more than 6 months; or a small amount of a dispersant is added, and then a particle-like sodium tobias salt product with extremely-good dispersity can be obtained through a pressure spray drying process.

Description

technical field [0001] The invention relates to a preparation method of torodolite sodium salt, in particular to a preparation method of an environment-friendly torodolite sodium salt product, and belongs to the technical field of torodolite sodium salt preparation. Background technique [0002] Turbine acid products are mainly used for the synthesis of azo dyes, the preparation of ink pigments, the production of J acid and Y acid, etc. There are two situations in the application of Tubic acid, one is the application under acidic conditions, such as the synthesis of J acid and Y acid, etc.; the other is the application after being converted into Tubic acid sodium salt solution under alkaline conditions, Such as synthetic azo dyes, pigments for ink preparation, etc. The traditional tunic acid product is obtained by flash drying. It is a powder dosage form. During use, the dust pollution is large. When it is used to synthesize azo dyes, it needs to be converted into a water-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/47C07C303/32
Inventor 吕立宏吴永廷刘云龙
Owner 山西翔宇化工有限公司
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