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Preparation method of 2-(4'-amyl-benzoyl) benzoic acid

A technology of pentylbenzoyl and benzoic acid, which is applied in the field of preparation of 2-benzoic acid, can solve the problems of environmental pollution, large amount of catalyst consumption, difficult post-processing, etc., and achieve the effect of no three wastes and less catalyst consumption

Inactive Publication Date: 2010-12-22
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using traditional Lewis acid such as aluminum trichloride as a catalyst to prepare ABB acid has the disadvantages of large amount of catalyst, difficult post-processing and environmental pollution.

Method used

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  • Preparation method of 2-(4'-amyl-benzoyl) benzoic acid
  • Preparation method of 2-(4'-amyl-benzoyl) benzoic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The molar ratio of tert-amylbenzene:phthalic anhydride:catalyst is 0.5:1.0:1.0. The catalyst uses chlorinated-1-methyl-3-butylimidazole-aluminum trichloride ionic liquid.

[0020] Into a 250ml three-necked flask equipped with a thermometer and a stirrer, add 5.28g of tert-amylbenzene, 5.29g of phthalic anhydride, and 11.01g of catalyst, blow in nitrogen, start stirring, slowly raise the temperature to 50°C, and react at this temperature for 5h. After the reaction, add water and suction filter to obtain white powdery solid ABB acid with a yield of 62.3% and a purity of 92.0%.

Embodiment 2～16

[0022] According to the method of Example 1, experiments under different conditions were carried out, and the variation factors and experimental results of each embodiment are shown in Table 1.

[0023] Table 1 Embodiment 1~16 test conditions and results

[0024]

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Abstract

The invention discloses a preparation method of 2-(4'-amyl-benzoyl) benzoic acid. The 2-(4'-amyl-benzoyl) benzoic acid is synthesized by taking tert-amyl benzene and phthalic anhydride as raw materials and taking chlorination-1-methyl-3-butyl imidazole-aluminum chloride or triethylamine hydrochloride-aluminum chloride ion liquid as a catalyst, wherein the feeding molar ratio of the tert-amyl benzene to the phthalic anhydride to the ion liquid catalyst is 0.5-3.0:1.0:0.67-1.2; the optimal feeding ratio is 1.0-1.2:1.0:1.0; the reaction temperature is 20-80 DEG C, and the optimal reaction temperature is 40-60 DEG C; the reaction time is 2-12h, and the optimal reaction time is 6-8h; and after reaction, water is added for carrying out suction filtration to obtain solid ABB acid. By adopting the method, the reaction yield can reach 98%.

Description

technical field [0001] The invention relates to a preparation method of 2-(4'-pentylbenzoyl)benzoic acid. Background technique [0002] 2-Amylanthraquinone is widely used in the synthesis of pesticides, medicines and dyes and the production of hydrogen peroxide. Mitsubishi Gas Chemical Corporation (MGC) is the first company to exclusively use amyl anthraquinone to produce hydrogen peroxide. Adding amyl anthraquinone to the working solution for hydrogen peroxide production by anthraquinone method can greatly improve the production capacity of the device. According to literature (Hu Changcheng. New developments in the hydrogen peroxide industry at home and abroad in recent years [J]. Chemical Propellants and Polymer Materials, 2009, 7(1): 1-6), Solvay uses the so-called "high-capacity working fluid ", that is, the working fluid containing amyl anthraquinone is mainly used to greatly increase the production capacity of the device, which can make the H produced by the hydrogen...

Claims

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Application Information

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IPC IPC(8): C07C65/34C07C51/373B01J31/02
Inventor 王文浩周集义段晶白森虎李新豪高宝柱贾利亚王建伟
Owner LIMING RES INST OF CHEM IND
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