Industrial production method of vat dark blue BO

A production method, deep blue technology, applied in chemical instruments and methods, organic chemistry, carbon-based compound preparation, etc., can solve the problems of high raw material consumption, high production cost, environmental pollution, etc., and achieve high yield, good product quality, Environmentally friendly effect

Pending Publication Date: 2020-01-21
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

Method used

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  • Industrial production method of vat dark blue BO
  • Industrial production method of vat dark blue BO
  • Industrial production method of vat dark blue BO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 400L PEG-400 from the metering tank, start stirring, put 72kg of anhydrous sodium acetate (molecular weight 82, 878mol) and 520kg potassium hydroxide (molecular weight 56, 9.29kmol) into a 2000L condensation pot at a time under stirring conditions, and use less than 0.3Mpa Steam is heated to 130-135°C to fully dissolve the raw materials; under a stable temperature of 120-135°C, use 0.01-0.02Mpa nitrogen for protection; for the first time, add about 0.75 kg (mass. Concentration is 77%), after 5 minutes, add 7.5 kilograms of benzothrone, after the temperature is stable (about 5 minutes), add sodium hypochlorite for the second time, add benzoxantrone for the second time after 5 minutes, add alternately, thereafter every The second feeding must wait for the temperature to fall back to 120-135°C before continuing to add 0.75kg of sodium chlorate each time, and the time interval between two feedings of the same material is more than 10 minutes. The whole batch of materials...

Embodiment 2

[0035] Add 700L of the concentrated mother liquor obtained in Example 1 from the metering tank, add 80L PEG-400 in addition, start stirring, and mix 14.4kg anhydrous sodium acetate (molecular weight 82, 176mol), 104kg potassium hydroxide (molecular weight 56, 1.86mol) under stirring condition kmol) into a 2000L condensation pot at a time, heat up to 130-135°C with less than 0.3Mpa steam to fully dissolve the raw materials; under a stable temperature of 120-135°C, use 0.01-0.02Mpa nitrogen for protection; the first time to add About 0.75 kilograms of sodium chlorate aqueous solution configured (mass concentration is 77%), after 5 minutes, add 7.5 kilograms of benzoantrone, after the temperature is stable (about 5 minutes), add the second sodium hypochlorite, and then add the second sodium hypochlorite after 5 minutes Secondary benzoanthrone, add alternately, and after that, the temperature must drop to 120-135°C before continuing to add 0.75kg of sodium chlorate each time, and t...

Embodiment 3

[0040] Add 670L tetraethylene glycol from the metering tank, start stirring, and put 144kg anhydrous sodium acetate (molecular weight 82, 1.76kmol) and 183kg potassium hydroxide (molecular weight 56, 3.26kmol) into a 2000L condensation pot once under stirring conditions, and use less than 0.3 Mpa steam is heated to 130-135°C to fully dissolve the raw materials; under the stable condition of 120-135°C, protect with 0.01-0.02Mpa nitrogen; add about 1.16 kg of sodium chlorate aqueous solution for the first time ( Mass concentration is 60%), add 7.5 kilograms of benzothrone after 5 minutes, add the second sodium hypochlorite again after the temperature is stable (about 5 minutes), add the second benzoxantrone after 5 minutes, add alternately, thereafter Add 0.75kg of sodium chlorate each time, and the time interval between two feedings of the same material is more than 10 minutes. The whole batch of materials is added in about 50 times. The whole feeding process takes about For 7....

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Abstract

The invention relates to the field of fine chemical engineering, in particular to an industrial production method for vat dark blue BO, which comprises the following steps: adding anhydrous sodium acetate, potassium hydroxide and a solvent into a reaction kettle under a stirring condition, heating with steam until the sodium acetate and potassium hydroxide are fully dissolved, and introducing nitrogen into the reaction kettle for protection; alternately adding sodium chlorate and benzanthrone and controlling the temperature of the feed liquid; after the feeding is finished, raising the temperature to carry out a condensation reaction; after the condensation reaction is finished, transferring a reaction solution into an oxidation kettle, adding water, and introducing air or oxygen while stirring to perform an oxidation reaction; after the reaction is finished, performing filtration to obtain a solid, and washing the solid with hot water to obtain a vat dark blue BO crude product; addingwater into the crude product for pulping, and adding acid to adjust the pH to weak acidity; performing filtration and drying to obtain a vat dark blue BO finished product. According to the industrialproduction method for vat dark blue BO provided by the invention, the mother liquor is concentrated and recycled, so that the cost is further reduced, and the method is more environment-friendly.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to an industrial production method for reducing deep blue BO. 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] The vat dark blue BO dye is an anthrone vat dye, which bel...

Claims

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Application Information

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IPC IPC(8): C07C45/37C07C49/617C09B9/02
CPCC07C37/64C07C45/37C09B9/02C07C39/14C07C49/617
Inventor 汤学斌周坚彪熊俊
Owner JIANGSU YABANG DYE
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