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Catalyst for synthesizing cyclohexylbenzene

A cyclohexylbenzene and catalyst technology, which is applied in molecular sieve catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the problem of low selectivity of cyclohexylbenzene, high selectivity of by-product methylcyclopentylbenzene, phenol cyclohexylbenzene Difficult separation of ketone products and other problems to achieve the effect of improving selectivity

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the catalyst in the prior art causes the selectivity of the by-product methylcyclopentylbenzene in the reaction to be high and the selectivity of cyclohexylbenzene to be low, thereby the reaction of subsequent oxidative decomposition to prepare phenol cyclohexanone Difficult technical problems in product separation

Method used

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  • Catalyst for synthesizing cyclohexylbenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Catalyst preparation

[0041] Weigh PdCl containing Pd1.5g 2 Be dissolved in 1mol / L hydrochloric acid aqueous solution and be made into 80g solution I; Take by weighing 100g diameter be 1mm, the non-bonding cylindrical hydrogen type BEA zeolite molecular sieve of length 5mm (the mol ratio of silicon dioxide / aluminum oxide is 45); The solution I was loaded on the hydrogen-type BEA zeolite molecular sieve, impregnated at room temperature for 12 hours, dried at 100° C. for 12 hours, and calcined at 450° C. for 4 hours to prepare the desired catalyst.

[0042] 2. Catalyst evaluation

[0043] Get 10ml catalyst packing in the fixed-bed reactor, carry out activity evaluation after reduction activation, condition is as follows: the temperature of reaction is 150 ℃, and the mol ratio of benzene and hydrogen in the reaction raw material is 0.8, and the pressure of reaction is 2.0MPa (gauge pressure) , the weight space velocity of the raw material benzene for the reaction is ...

Embodiment 2

[0070] 1. Catalyst preparation

[0071] Weigh PdCl containing 0.3gPd 2 Dissolve in 1mol / L hydrochloric acid aqueous solution and be made into 40g solution I; Weigh the La(NO 3 ) 3 ·6H 2 O is dissolved in water to make 20g solution II; weigh Co(NO 3 ) 3 ·6H 2 O is dissolved in water and made into 20g solution III; then solution I, solution II and solution III are mixed uniformly; 100g diameter is taken by weighing 1mm, length 5mm cylindrical hydrogen-type BEA zeolite molecular sieve (silicon dioxide / oxidized The molar ratio of aluminum is 45), the mixed solution is loaded on the hydrogen-type BEA zeolite molecular sieve, impregnated at room temperature for 12 hours, dried at 100°C for 12 hours, and calcined at 450°C for 4 hours to prepare the desired catalyst.

[0072] 2. Catalyst evaluation

[0073] Catalyst evaluation method see embodiment 1.

[0074] For the convenience of comparison, the composition of the catalyst is listed in Table 1, and the evaluation results ar...

Embodiment 3

[0076] 1. Catalyst preparation

[0077] Weigh PdCl containing 0.3gPd 2 Be dissolved in 1mol / L hydrochloric acid aqueous solution and be made into 40g solution I; Take the Ce(NO 3 ) 3 ·6H 2 O is dissolved in water to make 20g solution II; weigh Co(NO 3 ) 3 ·6H 2 O is dissolved in water and made into 20g solution III; then solution I, solution II and solution III are mixed uniformly; 100g diameter is taken by weighing 1mm, length 5mm cylindrical hydrogen-type BEA zeolite molecular sieve (silicon dioxide / oxidized The molar ratio of aluminum is 45), the mixed solution is loaded on the hydrogen-type BEA zeolite molecular sieve, impregnated at room temperature for 12 hours, dried at 100°C for 12 hours, and calcined at 450°C for 4 hours to prepare the desired catalyst.

[0078] 2. Catalyst evaluation

[0079] Catalyst evaluation method see embodiment 1.

[0080] For the convenience of comparison, the composition of the catalyst is listed in Table 1, and the evaluation results...

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Abstract

The invention relates to a catalyst for synthesizing cyclohexylbenzene and a method for synthesizing cyclohexylbenzene by a benzene-hydroalkylation one-step method. The catalyst is used for solving the technical problem in the prior art that the reaction is high in methyl cyclopentyl benzene selectivity and low in cyclohexylbenzene selectivity due to catalysts. Through adopting the technical scheme that the catalyst for synthesizing cyclohexylbenzene contains a carrier and the following ingredients in percentage by weight: (1) 0.05-2.0% of Pd; (2) 0-3.0% of at least one of lanthanide elements; and (3) 0-4.0% of at least one of ferrous elements, wherein the carrier is H-type zeolite molecular sieves, a better effect is obtained, and the catalyst can be applied to the preparation of cyclohexylbenzene by the benzene-hydroalkylation one-step method.

Description

technical field [0001] The invention relates to a cyclohexylbenzene catalyst, a preparation method thereof and a method for synthesizing cyclohexylbenzene by one-step hydroalkylation of benzene. Background technique [0002] Cyclohexylbenzene is an important intermediate widely used in liquid crystal, plastics, coatings, adhesives and other fields. Cyclohexylbenzene liquid crystal has the characteristics of extremely high chemical stability, photochemical stability, low viscosity and excellent physical properties, and is one of the ideal materials for display devices. Cyclohexylbenzene is used as an additive for lithium-ion battery electrolyte, has anti-overcharge performance, and can improve the safety performance of the battery. In addition, phenol and cyclohexanone can be prepared through the peroxidation and decomposition reaction process of cyclohexylbenzene, which are used to produce bulk chemical raw materials such as phenolic resin, caprolactam and nylon, and have g...

Claims

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Application Information

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IPC IPC(8): B01J29/74B01J29/76C07C2/74C07C13/28
Inventor 黄琴琴王德举刘仲能韩亚梅赵斌张勤
Owner CHINA PETROLEUM & CHEM CORP
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