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Pollution-free preparation process of direct fast red bnl dye

A preparation process, pollution-free technology, applied in the preparation of azo dyes, azo dyes, organic dyes, etc., can solve problems such as increasing product cost, environmental pollution, etc., to save energy, reduce production costs, and expand production capacity. Effect

Active Publication Date: 2016-04-06
内蒙古乌海亚东精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of waste water is produced in the traditional production process of the dye, which will cause serious environmental pollution if discharged without treatment, and the treatment of process waste water will increase the cost of the product

Method used

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  • Pollution-free preparation process of direct fast red bnl dye
  • Pollution-free preparation process of direct fast red bnl dye
  • Pollution-free preparation process of direct fast red bnl dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The specific raw materials and dosage are as follows:

[0038]

[0039]

[0040] Described BHK acid is 4-(4'-toluenesulfonyl) azohydrogen acid base-2-methyl-5-methoxyaniline, and structural formula is as follows:

[0041]

[0042] A pollution-free preparation process of direct light fast red BNL dye, the steps are as follows:

[0043] ⑴ Cyanuric chloride beating

[0044] Add 700kg of water to the condensation tank, add 1000kg of ice, add 3kg of emulsifier (reactive emulsifier EleminolJS-2), add cyanuric chloride to beating for 30 minutes, and set aside; use ice as a means to maintain low temperature, and the temperature needs to be maintained at 0 -5°C.

[0045] After adding the beating agent in this step, the beating time is reduced by 30 minutes.

[0046] ⑵BHK acidifying material

[0047] Add 2000kg of water to the chemical material tank, add BHK acid for beating for 2 hours, and adjust the pH to 6 with caustic soda solution for complete dissolution;

[...

Embodiment 2

[0065] The emulsifier used in this embodiment is JS-C, and all the other dosages and methods are the same as in Example 1.

[0066] The reactive emulsifier EleminolJS-2 and emulsifier JS-C are commercially available products.

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Abstract

The invention relates to a pollution-free preparation technology of direct fast red BNL (neutral blue) dye. The pollution-free preparation technology comprises the following steps: respectively dissolving cyanuric chloride and BHK acid so as to form solutions, carrying out three-times condensation on the solutions, adding aniline, hydrolyzing, diazotizing ortho anisidine-4-sulfonic acid, adding diazotizing liquid to hydrolysate cooled to 10 DEG C obtained in the step seven within one hour, adjusting the pH value to 8.5 by using sodium carbonate, carrying out coupled reaction for 2 hours, controlling temperature at 50-80 DEG C, and carrying out spray drying, thus obtaining the dye finished product. The pollution-free preparation technology has the advantages that a reaction type emulsifying agent Eleminol JS-2 or JS-C are added during dissolution of a red base B, the reaction rate is increased, the dissolution rate of the cyanuric chloride is increased, ice is saved, the using amount of raw materials is reduced to 1000kg from 2000kg, the using amount of the ice is reduced, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of dye preparation, relates to a dye preparation method, and specifically provides a pollution-free preparation process of direct fast red BNL dye. Background technique [0002] Direct dyes refer to dyes that can be directly dissolved in water, have high directness to cellulose fibers, and do not need to use relevant chemical methods to color fibers and other materials. Direct dyes can color protein fibers (such as wool and silk) in weakly acidic or neutral solutions, and are also used for dyeing cotton, hemp, rayon and rayon. The chromatogram is complete, the price is low, and the operation is convenient. The disadvantage is that the washing and light fastness are not ideal. [0003] In the traditional production process of direct dyes, the process of salting out, filtration and concentration is generally carried out; the purpose is to desalt, remove unreacted raw materials, intermediates and secondary dy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B43/00
Inventor 张超水赵宝忠张宝文王宁宁
Owner 内蒙古乌海亚东精细化工有限公司