Method for preparing phenolic compounds by catalytic conversion of acetone with ceria

A technology for catalyzing acetone and phenolic compounds with ceria, which is applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry and other directions, can solve the problems of reducing the selectivity and difficulty of phenolic compounds, and achieves high efficiency and simple preparation. , the effect of high reaction conversion rate

Active Publication Date: 2019-05-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Although the preparation of phenolic compounds by the lignin route reduces the dependence on petrochemical phenols, there are still some difficulties
Lignin depolymerization is usually achieved by hydrogenation route, which easily causes excessive hydrogenation of benzene ring and reduces the selectivity of phenolic compounds

Method used

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  • Method for preparing phenolic compounds by catalytic conversion of acetone with ceria

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 200g of ammonium cerium nitrate and bake it at 500°C for 5h under air atmosphere to obtain cerium dioxide. Fill the catalyst with 14-25 mesh of ceria forming sieve into a reaction tube with an inner diameter of 7mm, and fill it with a 15cm bed. Under normal pressure, the feed rate of acetone is 0.03mL·min -1 , nitrogen as the carrier gas, the flow rate is 30mL·min -1 , Reacted at 350°C for 12h, after the reaction was completed, the liquid was separated and analyzed by chromatography. The conversion of acetone was 65%, and the overall selectivity to phenolic compounds was 35%.

Embodiment 2

[0028] Weigh 200g of ammonium cerium nitrate and bake it at 500°C for 5h under air atmosphere to obtain cerium dioxide. Fill the catalyst with 14-25 mesh of ceria forming sieve into a reaction tube with an inner diameter of 8mm, fill it with a 25cm bed, and under normal pressure, the feed rate of acetone is 0.03mL·min -1 , nitrogen as the carrier gas, the flow rate is 30mL·min -1 , reacted at 350°C for 12h, and analyzed by chromatography after the reaction. The conversion of acetone was 58%, and the overall selectivity to phenolic compounds was 44%.

Embodiment 3

[0030] Weigh 200g of ammonium cerium nitrate and bake it at 500°C for 5h under air atmosphere to obtain cerium dioxide. Fill the catalyst with 14-25 mesh of ceria forming sieve into a reaction tube with an inner diameter of 10mm, fill it with a 30cm bed, and under normal pressure, the feed rate of acetone is 0.03mL·min -1 , nitrogen as the carrier gas, the flow rate is 30mL·min -1 , reacted at 350°C for 12h, and analyzed by chromatography after the reaction. The conversion of acetone was 68%, and the overall selectivity to phenolic compounds was 33%.

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Abstract

The invention relates to a method for preparing phenolic compounds by catalyzing acetone conversion with cerium oxide. The method uses acetone as a reactant, in ceria (CeO 2 ) under the catalysis of the preparation of phenolic compounds. The reaction conditions are as follows: the reaction is carried out in a fixed bed reactor under normal pressure, the reaction temperature is 340°C-450°C, and the feed rate of acetone is 0.01mL·min ‑1 ~0.1mL·min ‑1 , nitrogen as the carrier gas, the flow rate is 20mL min ‑1 ~80mL·min ‑1 After the reaction, the product composition was determined by mass spectrometry and quantified by chromatography. The method is characterized in that (1) the reaction conversion rate is high, and the total selectivity of phenolic compounds reaches 53%; (2) with CeO 2 As a catalyst, the catalyst is cheap, easy to prepare and high in efficiency, and can be regenerated after being calcined to remove carbon deposits, so it has potential application prospects.

Description

technical field [0001] The invention relates to a method for preparing phenolic compounds, in particular to a method for preparing phenolic compounds by catalyzing acetone transformation with cerium oxide. Background technique [0002] Phenolic compounds are an important class of organic chemical raw materials. Phenol is one of the important derivatives of propylene, mainly used in the production of phenolic resin, caprolactam, bisphenol A, adipic acid, aniline, alkylphenol, salicylic acid, etc.; methylphenol is mainly used in phenolic resin, electrical insulating paint, Dyes, surfactants and lubricant additives, etc. In addition, phenolic compounds play a major role in the life activities of the human body and plants, such as anti-oxidation and anti-virus. [0003] At present, the main sources of phenolic compounds are petrochemical crude oil and plants. Crude oil is distilled at atmospheric pressure to obtain light oil, which is hydrogenated, then fractionated into benz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/07C07C37/20
CPCC07C37/20C07C39/07
Inventor 王峰王业红徐杰张健张志鑫张晓辰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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