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A new method for the synthesis of reduced direct black rb

A new method and direct technology, applied in the field of reduction direct black RB dye synthesis process, can solve the problems of excessive heavy metals, containing refined naphthalene, change, etc., achieve the effect of environmental protection crystal form, performance improvement, and solve the effects of heavy metals exceeding the standard

Active Publication Date: 2017-08-25
安徽融创化工科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention improves the existing process, and proposes a new method for synthesizing and reducing direct black RB. In this method, the material is dried and denaphthalene before the copper removal, and firstly, it solves the problem that still exists in the material. The problem of containing refined naphthalene, and at the same time, the copper removal process adopts the combination of acid dissolution and oxidant sodium chlorate, which completely solves the problem of excessive heavy metals in the material, meets the requirements of environmental protection, and the crystal form of the material is completely changed, making the material The performance of the

Method used

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  • A new method for the synthesis of reduced direct black rb

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Effect test

Embodiment 1

[0016] A kind of new method of synthetic reduction direct black RB is characterized in that, it comprises the following steps:

[0017] (1) Preparation of crude product: 80 kg of anhydrous sodium acetate, 500 kg of refined naphthalene, 50 kg of tetrabromogold orange, 100 kg of aminoviolanthrone, 50 kg of 1-aminoanthraquinone, 25 kg of copper oxide, and 5 kg of anhydrous sodium carbonate Put it into the reactor for condensation reaction. The reaction conditions are to heat up to 130°C and then start to stir at 60r / min. When the temperature continues to rise to 180°C, stir at 180r / min. When the temperature reaches 180-250°C, keep warm for 10-20 hours , the crude product is obtained after steaming naphthalene after the heat preservation is over;

[0018] (2) Refining of crude product: Put the crude product obtained in step (1) into the reactor, then add 300 kg of 98% sulfuric acid, mix and stir for 15 minutes, then slowly add 5 kg of sodium chlorate, heat up, and keep warm at 60-...

Embodiment 2

[0021] A kind of new method of synthetic reduction direct black RB is characterized in that, it comprises the following steps:

[0022] (1) Preparation of crude product: 100 kg of anhydrous sodium acetate, 800 kg of refined naphthalene, 100 kg of tetrabromogolden orange, 200 kg of aminoviolanthrone, 100 kg of 1-aminoanthraquinone, 60 kg of copper oxide, and 10 kg of anhydrous sodium carbonate Put it into the reactor for condensation reaction. The reaction conditions are to heat up to 130°C first, then start stirring at 100r / min, continue to heat up to 180°C and stir at 200r / min, and keep warm for 10-20 hours when the temperature reaches 180-250°C. After the heat preservation is over, the crude product is obtained after distilling naphthalene;

[0023] (2) Refining of crude product: Put the crude product obtained in step (1) into the reactor, then add 300-800 kg of 98% sulfuric acid, mix and stir for 15 minutes, then slowly add 5 kg of sodium chlorate, heat up, and cool at 60-1...

Embodiment 3

[0026] A kind of new method of synthetic reduction direct black RB is characterized in that, it comprises the following steps:

[0027] (1) Preparation of crude product: Add 90 kg of anhydrous sodium acetate, 700 kg of refined naphthalene, 80 kg of tetrabromogolden orange, 150 kg of aminoviolanthrone, 80 kg of 1-aminoanthraquinone, 50 kg of copper oxide, and 7 kg of anhydrous sodium carbonate Condensation reaction is carried out in the reactor, the reaction condition is to heat up to 130°C and start stirring at 80r / min, continue to heat up to 180°C and stir at 190r / min, keep warm for 10-20 hours when the temperature reaches 180-250°C, keep warm The crude product is obtained after distilling naphthalene at the end;

[0028] (2) Refining of crude product: Put the crude product obtained in step (1) into the reactor, then add 300-800 kg of 98% sulfuric acid, mix and stir for 15 minutes, then slowly add 5 kg of sodium chlorate, heat up, and cool at 60-100°C Heat preservation react...

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Abstract

The invention discloses a novel method for synthesizing vat direct black RB, and belongs to the technical field of dye processing. The method comprises the three synthetic steps of preparing a crude product, refining the crude product and performing copper removal on a refined product. According to the method, a material is dried and subjected to naphthalene removal before copper removal, so that the problem that the material still contains refined naphthalene is solved at first; and meanwhile, a combined mode of acid dissolution and addition of an oxidizer-sodium chlorate is adopted in a copper removal process, so that the problem that heavy metal in the material exceeds the standard is radically solved, the environmental protection requirement is met, a crystal form of the material is radically changed, and the performance of the material is greatly improved.

Description

technical field [0001] The invention relates to a new method for reducing the synthesis process of direct black RB dye, belonging to the technical field of dye processing. Background technique [0002] With the rapid development of the national economy, people's consumption needs are gradually becoming more diversified, and the requirements for the functionality, comfort and fashion of textiles are getting higher and higher. Because vat dyes have more excellent properties than other cotton dyes, and also have unique color and functionality, the vat dyes market has a great prospect. [0003] Reduced direct black RB is an anthraquinone series vat dye. The product produced by traditional technology contains refined naphthalene, which is prone to stains, color spots, and uneven dyeing during use. At the same time, the content of heavy metals in the material is easy to exceed the standard. greatly limited its scope of application. Contents of the invention [0004] Aiming at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B3/42
CPCC09B3/42
Inventor 高鸿宇王洪卫徐卉香郭元蒋大为张文件
Owner 安徽融创化工科技股份有限公司
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