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Dye dispersant and preparation method thereof

A technology of dye dispersant and sulfonation reaction, applied in the direction of organic dyes, chemical instruments and methods, dissolution, etc., can solve problems such as environmental impact, increase production costs of enterprises, achieve high safety, reduce usage, and impurity content low effect

Active Publication Date: 2018-12-07
ZHEJIANG JIACHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing process, in order to complete the reaction, it is usually necessary to add excess sulfuric acid for sulfonation. The disadvantage is that the excess sulfuric acid needs to be neutralized with lime, which produces a large amount of solid waste such as calcium sulfate, which increases the production cost of the enterprise and is harmful to the environment. make an impact

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  • Dye dispersant and preparation method thereof

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preparation example Construction

[0027] The present invention at first provides a kind of preparation method of dye dispersant, can comprise the following steps:

[0028] Get naphthalene compound and sulfuric acid to carry out sulfonation reaction;

[0029] Collect the low-boiling organic matter produced in the sulfonation reaction;

[0030] After adding the low-boiling point organic matter into the reaction system of the sulfonation reaction, the reaction is continued to obtain a sulfonation product.

[0031] The preparation method of the dye dispersant of the invention can reduce the amount of sulfuric acid used, and further greatly reduce the generation of waste residue calcium sulfate, thereby achieving the purpose of environmental protection. In addition, the preparation method of the present invention uses low-boiling organic substances in the reaction process without introducing other substances, so that the problem of low purity of the product caused by the introduction of other unknown substances ca...

Embodiment 1

[0049] Weigh 100g of industrial methylnaphthalene and put it into a 500mL reaction vessel with a stirrer and a thermometer, start stirring, heat up to 100°C, add 75g of concentrated sulfuric acid with a mass fraction of 98%, and heat up to 150°C. The reaction was maintained for 1 hour, and then the vacuum pump was turned on, and the pressure of the vacuum environment was controlled to be -0.06~-0.05MPa. Insulate and react for 3 hours, and collect the obtained gasification products; at the same time, the gasification products are condensed, and the low-boiling point organic matter is obtained after layering to remove moisture. Then, 10 g of low-boiling-point organic matter was added dropwise into the reaction vessel, and the reaction was continued for 3 hours to obtain a sulfonated product, and the acid value was tested by sampling. Then cool the sulfonated product to 120°C, add water to make the acid value 20%, and then cool to 80°C. Add 45g of formaldehyde with a mass fracti...

Embodiment 2

[0051] Weigh 100g of industrial methylnaphthalene and put it into a 500mL reaction vessel with a stirrer and a thermometer, start stirring, heat up to 100°C, add 83g of sulfuric acid with a mass fraction of 98%, and heat up to 150°C. The reaction was maintained for 1 hour, and then the vacuum pump was turned on, and the pressure of the vacuum environment was controlled to be -0.06~-0.05MPa. Insulate and react for 3 hours, and collect the obtained gasification products; at the same time, the gasification products are condensed, and the low-boiling point organic matter is obtained after layering to remove moisture. Then, 10 g of low-boiling-point organic matter was added dropwise into the reaction vessel, and the reaction was continued for 3 hours to obtain a sulfonated product, and the acid value was tested by sampling. Then cool the sulfonated product to 120°C, add water to make the acid value 20%, and then cool to 80°C. 45g of formaldehyde with a mass fraction of 37% was add...

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Abstract

The invention provides a dye dispersant and a preparation method thereof. The preparation method for the dye dispersant comprises the following steps: taking a naphthalene compound and sulfuric acid for performing sulfonation reaction; collecting low-boiling-point organic matters generated in sulfonation reaction; adding the low-boiling-point organic matters into a reaction system of sulfonation reaction and then continuing to react, thereby acquiring a sulfonated product. The preparation method for the dye dispersant provided by the invention is capable of reducing the dosage of sulfuric acid, so as to greatly reduce the generation of waste residue calcium sulfate and achieve the purpose of environmental protection. Besides, the preparation method provided by the invention can avoid the problem of decline in quality of the product caused by the introduction of other unknown materials. Furthermore, the preparation method for the dye dispersant provided by the invention has higher safety, environmental protection property, lower cost and suitability for industrial large-scale production.

Description

technical field [0001] The invention relates to a dye dispersant and a preparation method thereof, belonging to the field of textile chemical industry. Background technique [0002] Dye compositions are widely used in the dyeing of natural and synthetic fibers, usually comprising dyes and dye dispersants. In dye compositions, dye dispersants serve three basic functions: (1) to help reduce the particle size of dye particles; (2) to maintain the dispersion medium; and (3) to act as diluents. There are usually two sources of dye dispersants: (1) sulfonated lignin from the wood pulping industry through sulfite pulping or kraft pulping; or (2) naphthalenesulfonic acid from the petroleum industry Salt. [0003] The dye dispersant of naphthalene sulfonate derived from the petroleum industry, the usual production process is to use naphthalene compounds and sulfuric acid for sulfonation reaction, after hydrolysis, then condense with formaldehyde aqueous solution, and then use lime ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/38B01F17/12C09K23/12
CPCC09B67/0086C09K23/00
Inventor 赵伟明阮华林叶华明王孝青
Owner ZHEJIANG JIACHENG CHEM
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