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Industrial synthesis method for vat blue 6

A synthesis method and finished product technology, applied in the field of dyes, can solve the problems of waste acid discharge, environmental pollution, high consumption of raw materials, high production cost, etc., and achieve the effects of reducing waste acid discharge, better utilization of resources, and quality assurance of materials

Inactive Publication Date: 2020-05-01
JIANGSU YABANG DYE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material consumption of this process is high, recycling is difficult, the production cost is high, and a large amount of waste acid is discharged and the environment is seriously polluted.

Method used

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  • Industrial synthesis method for vat blue 6
  • Industrial synthesis method for vat blue 6
  • Industrial synthesis method for vat blue 6

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) After testing, the water content in the raw material Vat Blue 4 dry product powdery material is 2%; the amount of chlorobenzene added from the metering tank is 2000L, start stirring, and under stirring conditions, 500Kg of Vat Blue 4 dry product powdery material is once Put in a 3000L condensation pot, heat up the steam to 110-112°C for dehydration for 1 hour, then cool down;

[0033] (2) Cool down to 30-35°C, add 400Kg of sulfuryl chloride dropwise from the metering tank, heat up the material to 80-85°C after adding, keep the temperature for 5 hours, take samples to measure the chlorine content of the material; after the chlorine content is qualified, stop heating;

[0034] (3) Add 500L of water to the reactor to dilute the material, then add sodium hydroxide until the pH of the material is neutralized to 8-10 (the amount of alkali is based on the actual pH);

[0035] (4) Straight through the steam to heat up the material for distillation, the steamed vapor phase i...

Embodiment 2

[0038] (1) After testing, the water content in the raw material Vat Blue 4 dry product powdery material is 0.5%; the amount of o-dichlorobenzene added from the metering tank is 1500L, and the stirring is started, and the dry product powdery material of Vat Blue 4 is mixed under stirring conditions Put 500Kg into a 3000L condensation pot at a time, heat up to 100-110°C, stir evenly, and cool down;

[0039] (2) Cool down to 30-35°C, add 750Kg of sulfuryl chloride dropwise from the metering tank, heat up the material to 85-90°C after adding, keep the temperature for 5 hours, take samples to measure the chlorine content of the material; after the chlorine content is qualified, stop heating;

[0040] (3) Add 1000L of supernatant water reclaimed in step (4) to the reaction kettle to dilute the material, then add sodium carbonate until the pH of the material is neutralized to 7~9 (the amount of alkali is based on the actual pH);

[0041] (4) Straight through the steam to heat up the ...

Embodiment 3

[0044] (1) After testing, the water content in the raw material Vat Blue 4 dry product powdery material is 1.0%; the amount of chlorobenzene added from the metering tank is 1200L, start stirring, and under stirring conditions, 500Kg of Vat Blue 4 dry product powdery material is once Put in a 2000L condensation pot, heat up the steam to 110-112°C for dehydration for 1 hour, then cool down;

[0045] (2) Cool down to 30-35°C, add 450Kg of sulfuryl chloride dropwise from the metering tank, heat up the material to 75-85°C after adding, keep the temperature for 5 hours, take samples to measure the chlorine content of the material; after the chlorine content is qualified, stop heating;

[0046] (3) Add 750L of water to the reactor to dilute the material, then add sodium hydroxide until the pH of the material is neutralized to 8-10 (the amount of alkali is based on the actual pH);

[0047] (4) Straight through the steam to heat up the material for distillation, the steamed vapor phase...

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Abstract

The invention relates to the technical field of dyes, specifically to an industrial synthesis method for vat blue 6. The industrial synthesis method comprises the following steps: adding a vat blue 4solid into an aromatic inert solvent so as to obtain a vat blue 4 solution or suspension; adding sulfonyl chloride into the vat blue 4 solution or suspension, and controlling the temperature of the solution to be 20-40 DEG C in the adding process; after addition is finished, carrying out heating for a reaction; after the reaction is finished, adding water into the reaction solution to dilute a material, and adding alkali to adjust the pH value of the reaction solution to 7-10; and after the pH value of the reaction solution is adjusted, distilling the reaction solution under heating, after a solvent is distilled, transferring a material to a filter press for filter pressing, carrying out blowing and washing with hot water until the pH value is 5-8, and carrying out discharging so as to obtain a finished product, namely the vat blue 6. The solvent used in the industrial synthesis method of the vat blue 6 provided by the invention is good in thermal stability and easy to regenerate, so the quality of the material can be further guaranteed; meanwhile, the solvent can be recycled and reused through steam distillation by using a physical method, so resources are better utilized, and discharging of waste acid and waste salt is reduced.

Description

technical field [0001] The invention relates to the technical field of dyes, in particular to an industrial synthesis method of Vat Blue 6. Background technique [0002] There are many kinds of vat dyes, with excellent fastness, especially the fastness to light and washing. Therefore, vat dyes have always been an important class of dyes for cotton dyes and printing. However, for a long time, its production and use have always been accompanied by major environmental pollution problems. Research and development of green technology in the dye production process, design, manufacture and application of new production equipment and industrial production applications, reduce raw materials and energy consumption, reduce It is of great economic and social significance to realize the production of clean technology and achieve the goal of energy saving and emission reduction, and it is a very urgent task. [0003] Vat blue 6 dye is an anthraquinone vat dye, which belongs to the blue a...

Claims

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Application Information

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IPC IPC(8): C09B5/58C09B67/28
CPCC09B5/58C09B67/0077
Inventor 周坚彪汤学斌熊俊
Owner JIANGSU YABANG DYE
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