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Copper-loaded mesoporous carbon catalyst for benzene hydroxylation and preparation method thereof

A technology of benzene hydroxylation and mesoporous carbon, which is applied in the preparation of organic compounds, catalysts for physical/chemical processes, chemical instruments and methods, etc., can solve the problems of high price, poor stability, complicated preparation methods, etc. The effect of short cycle and simple preparation technology

Inactive Publication Date: 2017-04-26
QINGHAI NORMAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a copper-loaded mesoporous carbon catalyst for the hydroxylation of benzene and its preparation for the current catalysts for the hydroxylation of benzene to phenol, which are complicated in preparation methods, expensive in price, poor in stability, and low in catalytic activity. method, the catalyst has high catalytic activity and product yield, and can be recycled many times after simple processing

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  • Copper-loaded mesoporous carbon catalyst for benzene hydroxylation and preparation method thereof
  • Copper-loaded mesoporous carbon catalyst for benzene hydroxylation and preparation method thereof
  • Copper-loaded mesoporous carbon catalyst for benzene hydroxylation and preparation method thereof

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Embodiment 1

[0027] 1. Preparation method of copper-loaded mesoporous carbon

[0028] 1. Preparation by dipping method

[0029] 1.1. Preparation of mesoporous carbon

[0030] Using hydroxypropyl-β-cyclodextrin (β-HPCD) as the structure-directing agent, and ethyl orthosilicate (TEOS) as the silicon precursor, the organic-inorganic hybrid was synthesized at room temperature. The specific operation was as follows: -HPCD is dissolved in dilute sulfuric acid aqueous solution, stirred vigorously at room temperature to a clear and transparent solution, add 20g TEOS, continue to stir until homogeneous, the molar ratio of the composition system is 1 TEOS:0.069β-HPCD:0.0018 H 2 SO 4 :15 H 2 O. After distillation under reduced pressure, the colorless and transparent gel obtained is placed in an open container and aged for 3 days, dried at 40°C to obtain an organic-inorganic hybrid.

[0031] The hybrid was carbonized in an electric furnace under inert gas protection: the temperature of the electric furnace wa...

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Abstract

The invention discloses a copper-loaded mesoporous carbon catalyst for benzene hydroxylation and a preparation method thereof. The preparation method comprises the following steps: dissolving hydroxypropyl-beta-cyclodextrin in a dilute sulphuric acid water solution; then adding tetraethyl orthosilicate and cupric nitrate; uniformly stirring, and then distilling to obtain a gel substance; placing the gel substance in an open container for aging; then drying; carbonizing under the protection of an inert gas; soaking a carbide in an HF solution; then filtering; sequentially washing with absolute ethyl alcohol and deionized water; and drying to obtain the copper-loaded mesoporous carbon catalyst for benzene hydroxylation. The copper-loaded mesoporous carbon catalyst shows a certain catalytic activity and high selectivity for directly preparing phenol through benzene hydroxylation, and has the benzene conversion ratio of 74% and the phenol selectivity of 98%.

Description

Technical field [0001] The invention belongs to the field of phenol preparation, and in particular relates to a copper-carrying mesoporous carbon catalyst for hydroxylation of benzene and a preparation method thereof. Background technique [0002] Phenol is an important basic organic chemical raw material, which is mainly used to produce chemical products such as aniline, fatty acid, bisphenol A, phenolic resin, and is also widely used in medicine, dyes, daily necessities and other industries. At present, the main method for producing phenol in the world is the cumene method, and its production capacity accounts for about 92% of the world's total phenol production capacity. Although the process is mature, it has high energy consumption, low atomic utilization, high risk, serious environmental pollution, and the output is limited by the sales of co-product acetone, which is not in line with the strategy of sustainable development. In recent years, the only by-product of phenol pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C37/60C07C39/04
CPCY02P20/52B01J23/72C07C37/60C07C39/04
Inventor 王慧春朱永祥王发春王文颖杜军华陈海娟
Owner QINGHAI NORMAL UNIV
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