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High-efficiency preparation method of p-benzoquinone compounds

A compound, p-benzoquinone technology, applied in the field of preparation of p-benzoquinone compounds, can solve problems such as pollution and equipment corrosion

Inactive Publication Date: 2015-08-19
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the acid corrodes the equipment seriously, and produces a large amount of waste acid, waste residue and other waste, there is a serious pollution problem

Method used

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  • High-efficiency preparation method of p-benzoquinone compounds
  • High-efficiency preparation method of p-benzoquinone compounds
  • High-efficiency preparation method of p-benzoquinone compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add hydroquinone (11.0g, 100mmol) and petroleum ether (32.5g, 50mL) into a 250mL two-necked flask, put -10 o Stir well in an ethylene glycol / dry ice bath in C, add lithium chloride (0.04 g, 1.0 mmol) and react in 1 atm air for 24 hours to obtain p-benzoquinone: 10.1 g.

Embodiment 2-5

[0018] Lithium chloride in embodiment 1 is replaced with other alkali / alkaline earth metal compounds, and the influence on result is shown in the following table:

[0019] project Main catalyst (g, mmol) p-Benzoquinone (g) 1. -- 0.5 2. Cesium nitrate (0.19, 1.0) 2.4 3. Calcium oxide (0.06, 1.0) 7.5 4. Barium carbonate (0.20, 1.0) 6.2

Embodiment 6-15

[0021] The sherwood oil in embodiment 1 is replaced with various solvents, and the impact on catalytic result is shown in the following table:

[0022]

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PUM

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Abstract

The invention relates to a high-efficiency preparation method of p-benzoquinone compounds. According to the high-efficiency preparation method, a p-dihydroxybenzene compound is taken as a raw material, and the p-benzoquinone compounds are prepared in the presence of an alkali / alkali-earth metal catalyst. Advantages are that: 1) the high-efficiency preparation method is simple, and amplification of operation processes and industrialized production can be realized easily; 2) a plurality of the p-benzoquinone compounds can be synthesized, and the high-efficiency preparation method is an universal method used for preparing the p-benzoquinone compounds.

Description

technical field [0001] The invention relates to a method for preparing p-benzoquinone compounds, in particular to a catalyst capable of highly selectively catalyzing hydroquinone compounds to prepare p-benzoquinone compounds in an oxygen-containing atmosphere. Background technique [0002] P-benzoquinone compounds are a kind of fine chemical raw materials with wide application and high added value. They can be directly used as raw materials in pesticides, dyes and other industries, and can also be used as intermediates in rubber antioxidants, pesticides, dyes, and antioxidants. Synthesis of chemical products such as polymerization inhibitors. For example, p-benzoquinone can be used directly as an antioxidant for rubber, and can also be used as a synthetic intermediate for the synthesis of rubber antioxidants, pesticides, dyes, and polymerization inhibitors for polymer monomers; trimethyl-p-benzoquinone can be used as a vitamin E Synthetic intermediates are also widely use...

Claims

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Application Information

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IPC IPC(8): C07C50/04C07C50/02C07C46/08
CPCC07C46/08C07C50/02C07C50/04
Inventor 安增建万晓波
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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