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Chrysophenine G production process

A production process and direct technology, applied in the field of production process of direct frozen yellow G, can solve the problems of production efficiency affecting the ecological environment, high cost, high energy consumption, unfavorable long-term production, etc., and achieve good color retention and durability, recycling Easy, cost-effective results

Inactive Publication Date: 2015-09-02
吕永赛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Yet adopt above-mentioned method to have following shortcoming, the productive rate that uses sodium chloride to carry out salting-out is often not high, 65-66%, and through the production of a period of time, the corrosion situation of equipment is serious, the waste water of production is extremely difficult to handle, seriously affects Improve the ecological environment and production efficiency
CN102040855B discloses a water-free preparation method of direct frozen yellow G, which replaces the water in the production process with ethanol. Although this method does not produce waste water, it is expensive in terms of raw material production cost and energy consumption of recovering a large amount of ethanol. The cost and energy consumption are too high, which is not conducive to large-scale long-term production

Method used

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  • Chrysophenine G production process

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Step 1: DSD acid beating and diazotization

[0033] Rinse the diazonium tank, put in deionized water, put in sodium carbonate after heating, slowly put in the DSD acid paste during the stirring process, continue to heat up to 60°C after the feeding, pH value 7-8, and brown Clarify the liquid, then naturally cool to 45℃ under stirring, slowly add dilute hydrochloric acid for acidification, the acidification time is 2-2.5h, and then continue to stir for 4h, cool to below 30℃, add sodium nitrite solution within 1h for reconstitution Nitriding, then put it into the coupling tank and continue to stir and react for 3h to obtain the diazonium compound solution;

[0034] Step 2: Preparation of sodium phenate

[0035] Add deionized water to the phenol tank, add sodium carbonate and raise the temperature to 30°C, then add phenol, and stir to obtain sodium phenolate;

[0036] Step 3: Coupling

[0037] Add sodium sulfate to the diazonium compound solution obtained in step 1, and then quick...

Embodiment 2

[0044] The basic preparation process is adopted from Example 1, except that the molar ratio of DSD acid to sodium carbonate and sodium nitrite in step 1 is 1:3:7, and the molar ratio of diazonium compound solution to sodium phenolate in step 3 It is 1:6, and the reaction time of ethylation in step 4 is 20h.

Embodiment 3

[0046] The basic preparation process is adopted from Example 1, except that the molar ratio of DSD acid to sodium carbonate and sodium nitrite in step 1 is 1:2.5:6, and the molar ratio of diazonium compound solution to sodium phenolate in step 3 It is 1:5, and the reaction time of ethylation in step 4 is 19h.

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Abstract

The invention aims at providing a chrysophenine G production process with high yield and low pollution in order to mainly overcome defects in the existing chrysophenine G production technology, and provides a favorable solution for solving problems of high cost, high energy consumption and high pollution caused in the chrysophenine G production process. Chrysophenine G is a direct dye, is orange powder seen from the appearance and belongs to the technical field of organic dyes. The production process comprises the steps of diazotizing DSD acid, and then, coupling the diazotized DSD acid and dimolecular phenol; and next, converting hydroxyl on the phenyl into ethyoxyl by using chloroethane. The process mainly aims at solving the technical problem of serious equipment corrosion caused by sodium chloride in the prior art through salting out realized by using anhydrous sodium sulfate; after the old process in which sodium chloride is used is changed into the process in which the anhydrous sodium sulfate is used, the yield is greatly increased, and the environment pollution is reduced to a great extent. The process meets the national requirement for mainly protecting the environment and conforms to the decisions of firmly supporting the great decision of the state for protecting the environment, reducing pollution and putting into more investment for improving new processes.

Description

[0001] Manual Technical field [0002] The invention relates to a production process of direct freeze yellow G, which belongs to the technical field of organic dyes. Background technique [0003] Direct Freeze Yellow G is a direct dye with an orange-yellow powder appearance. It is a golden yellow to yellow solution when dissolved in water. When the aqueous solution is below 15°C, freeze-like precipitates will precipitate, so it is called freeze yellow. It has strong dyeing power and light fastness. It is a valuable yellow dye in the textile industry. It is widely used for dyeing cotton, wool, silk, cloth, rayon, rayon, polyamide fiber, leather, paper, biology, etc. It can also be used to make lakes and pigments. [0004] The current widespread method is to couple DSD acid with two molecules of phenol after diazotization, and then convert the hydroxyl group on the phenol into ethoxy group through ethyl chloride. [0005] The specific synthesis reaction formula is: [0006] (1) Diazoti...

Claims

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Application Information

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IPC IPC(8): C09B43/28
Inventor 不公告发明人
Owner 吕永赛
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