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Method for synthesizing o-hydroxy phenyl ether

A technology of o-hydroxybenzene and diethyl ether, which is applied in the field of chemical intermediate synthesis, can solve the problems of complicated process, polluting the environment, and being highly toxic, and achieves the effects of easy separation and recovery, less pollution, and low cost

Inactive Publication Date: 2012-09-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These reactions have the disadvantages of complex process, serious corrosion, high toxicity, and environmental pollution.
In order to avoid these shortcomings, it has been reported in the literature that diethyl carbonate, a green chemical raw material, is used as an alkylation agent, which has the characteristics of non-toxic and non-corrosive, but its catalyst is Al 1 P a x b , the preparation is relatively complicated and the cost is high

Method used

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  • Method for synthesizing o-hydroxy phenyl ether

Examples

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Effect test

Embodiment 1

[0017] Example 1: Preparation of activated carbon-supported phosphoric acid.

[0018] Weigh 2g of activated carbon, wash it 1, 2 times, filter by suction, put it in an oven at 115℃ to dry to granular activated carbon with constant mass, soak it in 10mL of 16% phosphoric acid solution for 30h, filter by suction, and wash until medium Sex. Then, it was dried at 110°C for 5 hours and placed in a drying box to cool. 2.12 g of solid catalyst was weighed, and the mass fraction of activated carbon was calculated to be 6%.

Embodiment 2

[0019] Example 2: Preparation of activated carbon-supported phosphoric acid.

[0020] Weigh 2g of activated carbon, wash it once or twice with water, filter by suction, dry it in an oven at 115℃ to obtain granular activated carbon with constant mass, soak it in 10mL of 28% phosphoric acid solution for 30h, filter by suction, and wash until medium Sex. Then, it was dried at 110°C for 5 hours and placed in a drying box to cool. 2.20 g solid catalyst was weighed, and the mass fraction of activated carbon was calculated to be 10%.

Embodiment 3

[0021] Example 3: Preparation of activated carbon-supported phosphoric acid.

[0022] Weigh 2g of activated carbon, wash it with water for 1, 2 times, filter by suction, dry it in an oven at 115℃ to obtain granular activated carbon with constant quality, soak it in 10mL of 45% phosphoric acid solution for 30h, filter by suction, and wash with water until medium Sex. Then, it was dried at 110°C for 5 hours and placed in a drying box to cool. 2.30 g of solid catalyst was weighed, and the mass fraction of activated carbon was calculated to be 15%.

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Abstract

The invention discloses a method for synthesizing o-hydroxy phenyl ether. In the method, catechol is used as a raw material and diethyl carbonate is used as an alkylating agent; and activated carbon load type phosphoric acid is used as catalyst in synthetic reaction. The activated carbon load type phosphoric acid which is low in price and easy to prepare is used as catalyst, and o-hydroxy phenyl ether compounds can be prepared by catalytic synthesis; and the catalyst is easily separate and recovered, and can be repeatedly used for a plurality of times. The synthesis method has the advantages of being easy in obtaining of raw material, low in cost, simple and convenient in operation, mild in reaction condition, less in pollution, high in yield and the like, and is easy in industrial production.

Description

Technical field [0001] The invention belongs to the technical field of chemical intermediate synthesis, and particularly relates to a method for synthesizing o-hydroxyphenyl ethyl ether compounds. Background technique [0002] O-Hydroxyphenyl ethyl ether is an important fine chemical intermediate, which is widely used in the synthesis process of medicine, perfume (vanillin, artificial musk, etc.), fuel, cosmetics, antioxidant and polymerization inhibitor. In particular, guaiacol (scientific name o-hydroxyanisole) and ethyl wood phenol (scientific name o-hydroxyphenyl ethyl ether) are used as raw materials for the synthesis of vanillin in a relatively large amount. At present, its production methods mainly include the catalytic oxidation of o-aminophenethyl ether diazonium salt and the monoalkylation of catechol and alkyl esters or halogenated alkanes. These reactions have the disadvantages of complicated technological process, serious corrosion, high toxicity and environmental p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/23C07C41/16
CPCY02P20/584
Inventor 邵荣许伟祁刚吴俊戴勇李倩
Owner YANCHENG INST OF TECH