Method for preparing acid black 172

A technology of acid black and sulfonic acid, applied in chemical instruments and methods, dyeing methods, complex metal compounds of azo dyes, etc. 10%, long product production cycle and other problems, to achieve the effect of speeding up the chromating reaction, improving the product yield and reducing the cost of treatment

Inactive Publication Date: 2009-09-23
TIANJIN SANHUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned production method can obtain acid black 172, there are still the following problems: (1). The production process is complicated: after the product reaction is complete, steps such as salting out are also needed; (2). The product production cycle is long: mainly by the coupling of the reaction Time is determined by the chromization time. Generally, the coupling reaction needs 8 hours, and the chromation reaction needs 12 hours to reach the reaction end point, and the concentration of the general reaction solution is very low, o

Method used

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  • Method for preparing acid black 172
  • Method for preparing acid black 172
  • Method for preparing acid black 172

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of Acid Black 172, wherein the steps of the preparation method are:

[0032] (1). Put 295g of 100% 6-nitro-1,2-diazoxynaphthalene-4-sulfonic acid into the dissolution tank A and add 1000ml of water to dissolve it, and add the concentration to the tank A under the condition of stirring 30% sodium hydroxide solution to control the pH value to 5, and at the same time control the solution temperature to 18°C, the specific method of controlling the cooling of the solution can be the way of adding ice;

[0033] (2). Put 151g of 2-naphthol into the dissolving tank B and add 400ml of water to dissolve it, add 95ml of 30% sodium hydroxide solution into tank B, stir and heat up to 80°C, when the 2-naphthol is completely dissolved , add 3g dispersant NSO (condensate of β-naphthalenesulfonic acid and formaldehyde) and 8g ethylene glycol monobutyl ether, stir;

[0034] (3). Under the condition of rapid stirring, quickly pour the liquid in the dissolution tank B...

Embodiment 2

[0038] A preparation method of Acid Black 172, wherein the steps of the preparation method are:

[0039] (1). Put 295g of 100% 6-nitro-1,2-diazooxynaphthalene-4-sulfonic acid into the dissolution tank A and add 1000ml of water to dissolve it. Concentration is 30% sodium hydroxide solution, control the pH value to 4, and control the solution temperature at the same time to be 20 ℃, the specific method of controlling the cooling of the solution can be the way of adding ice;

[0040] (2). Put 151g of 2-naphthol into the dissolving tank B and add 400ml of water to dissolve it, add 95ml of 30% sodium hydroxide solution into the tank of B, stir and heat up to 85°C, when the 2-naphthol is completely dissolved , add 3g of dispersant ethoxylated nonylphenol and 8g of propylene glycol, and stir;

[0041] (3). Under the condition of rapid stirring, quickly pour the liquid in the dissolving tank B into the dissolving tank A to form a mixed solution, control the temperature of the mixed s...

Embodiment 3

[0045] A preparation method of Acid Black 172, wherein the steps of the preparation method are:

[0046] (1). Put 295g of 100% 6-nitro-1,2-diazooxynaphthalene-4-sulfonic acid into the dissolution tank A and add 1000ml of water to dissolve it. The sodium hydroxide solution with a concentration of 30% is controlled to have a pH value of 6, and at the same time, the temperature of the solution is controlled to be 12°C. The specific method for controlling the cooling of the solution can be the method of adding ice;

[0047] (2). Put 151g of 2-naphthol into the dissolving tank B and add 400ml of water to dissolve it, add 95ml of 30% sodium hydroxide solution into tank B, stir and heat up to 75°C, when the 2-naphthol is completely dissolved , add 3g dispersant sodium lignosulfonate and 8g ethylene glycol monomethyl ether, stir;

[0048] (3). Under the condition of rapid stirring, quickly pour the liquid in the dissolving tank B into the dissolving tank A to form a mixed solution, con...

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Abstract

The invention relates to a method for preparing acid black 172. The method comprises the following steps that: (1) 6-nitro-1 and 2-diazoxynaphthalene-4-sulfonic acid are put into a dissolution tank, added with water for dissolution, added with a sodium hydroxide solution and stirred. (2) 2-naphthol is put into the dissolution tank, added with water for dissolution, added with the sodium hydroxide solution, stirred, heated, added with a dispersant and aliphatic diol or ether and stirred again; (3) a prepared 2-naphthol solution is rapidly put into and coupled with a solution with 6-nitro-1 and 2-diazoxynaphthalene-4-sulfonic acid so as to obtain coupled liquid; and (4) the coupled liquid is added with formic acid, ammonium bicarbonate or sodium bicarbonate and basic chromium sulfate, heated to be between 100 and 102 DEG C, thermally insulated and stirred so as to obtain an acid black 172 serous finished product. The method for preparing acid black 172 has the advantages of simple production process, scientific reasonable control on reaction conditions, short production cycle of produces, high yield, good quality, friction resistance, obviously raised fastness of resisting rinse and sunshine, obviously reduced side reaction and impurities, low production cost, high production efficiency and better environment-friendly property.

Description

technical field [0001] The invention belongs to the field of metal complex azo dyes, in particular to a preparation method of acid black 172. Background technique [0002] Acid black 172 is an acid dye named according to the international dye number. Its trade name is neutral black S-RL. It has high color fastness to wool and polyamide fiber, and its price is relatively low. It is widely used in the dye field. It is widely used, and the market demand is increasing year by year. It is estimated that the global demand will reach 30,000 tons this year. The main reaction to produce Acid Black 172 is as follows: [0003] 1. Dissolution of 6-nitro-1,2-diazooxynaphthalene-4-sulfonic acid: [0004] [0005] 2. Dissolution of 2-naphthol: [0006] [0007] 3. Coupling reaction: [0008] [0009] 4. Chromating reaction: [0010] [0011] The production method of the above reaction is mainly to put 6-nitro-1,2-diazooxynaphthalene-4-sulfonic acid into a dissolution tank,...

Claims

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Application Information

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IPC IPC(8): C09B45/26D06P1/10D06P1/39D06P3/06
Inventor 叶锦岺
Owner TIANJIN SANHUAN CHEM
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