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Method for producing benzanthrone by using primary battery technology

A technology of benzoxantrone and primary battery, which is applied in the field of primary battery technology to produce benzoxantrone, which can solve the problems of low utilization rate of raw materials and difficult recovery of metal ions, etc., and achieve the effects of high utilization rate of raw materials, avoiding pollution, and reducing costs

Pending Publication Date: 2022-06-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to solve the key problems of difficult recovery of metal ions and low utilization rate of raw materials in the existing process, the present invention proposes a production method of benzothrone without metal reducing agent, high utilization rate of raw materials, concentrated and recycled mother liquor sulfuric acid, and no waste acid

Method used

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  • Method for producing benzanthrone by using primary battery technology
  • Method for producing benzanthrone by using primary battery technology
  • Method for producing benzanthrone by using primary battery technology

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The reaction takes place in a galvanic device consisting of a cathode cell, an anode cell, and a permeable membrane (see figure 1 ) in. Add 150mL of 87% sulfuric acid, 20g of anthraquinone, and 14mL of glycerin to the cathode tank, surround the tank wall with 316L stainless steel mesh as the positive electrode of the original battery, and anthraquinone will undergo reduction reaction in it, and the liquid level of the anode tank and the cathode tank will be equal. 87% of sulfuric acid, add an aluminum plate as the anode, connect the anode and the cathode directly with a wire, and connect the ammeter in series to measure the current generated by the electrochemical reaction. When the temperature is raised to 80°C, the initial current is greater than 190mA, and the reaction solution is bright yellow. As the reaction progressed, the color of the reaction solution became darker. After stirring for 10 hours, 34% of the anthraquinone remained, and the current was 120mA-140mA....

Embodiment 2

[0039] The reaction takes place in a galvanic device consisting of a cathode cell, an anode cell, and a permeable membrane (see figure 1 ) in. Add 150mL of 90% sulfuric acid and 20g of anthraquinone to the cathode tank, surround the tank wall with a 316L net as the positive electrode of the original battery, and anthraquinone will undergo a reduction reaction therein, add 87% of the sulfuric acid in the anode tank to the level of the cathode tank, Add an aluminum plate as the anode, connect the anode and the cathode directly with a wire, and connect an ammeter in series to measure the current generated by the electrochemical reaction. When the temperature is raised to 80°C, the initial current is 170mA-190mA, and the reaction solution is bright yellow. The color of the reaction solution deepened, and after stirring for 7 hours, 38% of the anthraquinone remained, and the current was 130mA-150mA.

[0040] Add 7.7mL of glycerol to the above reaction solution, heat and stir for 4...

Embodiment 3

[0043] The reaction takes place in a galvanic device consisting of a cathode cell, an anode cell, and a permeable membrane (see figure 1 ) in. Add 150mL of 90% sulfuric acid and 20g of anthraquinone to the cathode tank, surround the tank wall with a 316L stainless steel mesh as the positive electrode of the primary battery, in which anthraquinone undergoes a reduction reaction, add 87% sulfuric acid to the anode tank and the level of the cathode tank , add an aluminum plate as the anode, connect the anode and the cathode directly with a wire, and connect the ammeter in series to measure the current generated by the electrochemical reaction. When the temperature is raised to 80°C, the initial current is 170mA-190mA, and the reaction solution is bright yellow. The color of the reaction solution was deepened, and the anthraquinone remained at 9% after stirring for 11 hours, and the current was 60mA-80mA.

[0044]Transfer the reaction solution to a 250 mL three-neck flask, contin...

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Abstract

The invention discloses a method for producing benzanthrone by using a primary battery technology, and belongs to the field of fine chemical engineering. The reaction is carried out in a galvanic cell device consisting of a cathode tank, an anode tank and a permeable membrane. Concentrated sulfuric acid with the same concentration is added into a cathode tank and an anode tank to serve as a reaction medium, an aluminum plate serves as an anode, stainless steel 316L serves as a cathode, anthraquinone and glycerin are added into the cathode tank, reduction and cyclization reactions are carried out in the cathode tank, the anode and the cathode are directly connected through a wire, current is generated in the reaction process, and electrons flow to the cathode from the anode through a connecting wire. And the anode tank simultaneously generates aluminum sulfate. Compared with the prior art, according to the production method of the benzanthrone, a metal reducing agent is not added in the main reactor, pollution of metal ions is avoided, aluminum sulfate generated by an anode can be conveniently and completely recycled, secondary utilization value is achieved, meanwhile, the raw material utilization rate is high, and mother liquor sulfuric acid does not contain metal salt and can be concentrated and recycled.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a method for producing benzoxanthrone by primary battery technology. Background technique [0002] Anthraquinone dyes are the largest class of dyes except azo dyes. Anthraquinone-like dyes are mainly divided into four categories: acidic, reactive, disperse and vat dyes according to their application. They have three main advantages: one is excellent light fastness, and the other is that they can produce bright colors. Among dark dyes such as orange, purple, blue, green, especially blue, anthraquinone dyes occupy an irreplaceable role. The third is the low toxicity of anthraquinone dyes to the human body. At present, dark dyes are still dominated by dyes with anthraquinone structure, especially bright high-grade light-fast dyes, and anthraquinone series are still the first choice. [0003] Benzoanthrone is directly synthesized from anthraquinone, and the characteristic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/09C25B3/25C25B1/01C25B1/50
CPCC25B3/09C25B3/25C25B1/01C25B1/50
Inventor 杨希川陈丽佳
Owner DALIAN UNIV OF TECH
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