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Catalyst for synthesis of cyclohexylbenzene

A cyclohexylbenzene and catalyst technology, applied in the field of catalysts for cyclohexylbenzene synthesis, can solve the problems of low yield of cyclohexylbenzene, high yield of cyclohexylbenzene, low yield of cyclohexane, etc. Yield-increasing effect

Active Publication Date: 2018-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by this invention is the high yield of the by-product cyclohexane and the low yield of the main product cyclohexylbenzene in the prior art. A catalyst for the synthesis of cyclohexylbenzene is provided, which can be used When benzene and hydrogen react to synthesize cyclohexylbenzene, it has the advantages of low yield of cyclohexane and high yield of cyclohexylbenzene

Method used

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  • Catalyst for synthesis of cyclohexylbenzene
  • Catalyst for synthesis of cyclohexylbenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Catalyst preparation

[0037] Weigh PdCl containing Pd 1.5g 2 Be dissolved in 1mol / L hydrochloric acid aqueous solution and be made into 80g solution I; Measure 0.1L diameter to be 1mm, length 5mm non-binding cylindrical hydrogen type BEA zeolite molecular sieve (the mol ratio of silicon dioxide / alumina is 40); 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.

[0038] 2. Catalyst evaluation

[0039] 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 liquid volume space velocity of the reacted raw material benzene is 0.5h -1 .

[0040] For ...

Embodiment 2

[0060] 1. Catalyst preparation

[0061] Weigh PdCl containing Pd 0.3g 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 and Pr(NO 3 ) 3 ·6H 2 O is dissolved in water and is made into 40g solution II; Measure 0.1L diameter to be 1mm, length 5mm cylindrical hydrogen-type BEA zeolite molecular sieve (the mol ratio of silicon dioxide / aluminum oxide is 40), solution I and The solution II was mixed evenly and then 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.

[0062] 2. Catalyst evaluation

[0063] Catalyst evaluation method see embodiment 1.

[0064] For the convenience of comparison, the composition of the catalyst is listed in Table 1, and the evaluation results are listed in Table 2.

[0065] It can be known from Example 2 and Comparative Example 1 an...

Embodiment 3

[0067] 1. Catalyst preparation

[0068] Weigh PdCl containing Pd 0.3g 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 and Sm(NO 3 ) 3 ·6H 2 O is dissolved in water and is made into 40g solution II; Measure 0.1L diameter to be 1mm, length 5mm cylindrical hydrogen-type BEA zeolite molecular sieve (the mol ratio of silicon dioxide / aluminum oxide is 40), solution I and The solution II was mixed evenly and then 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.

[0069] 2. Catalyst evaluation

[0070] Catalyst evaluation method see embodiment 1.

[0071] For the convenience of comparison, the composition of the catalyst is listed in Table 1, and the evaluation results are listed in Table 2.

[0072] It can be seen from the comparison of Example 3 with Compar...

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Abstract

The invention relates to a catalyst for synthesis of cyclohexylbenzene, a preparation method thereof and a method of one-step synthesis of cyclohexylbenzene through hydroalkylation of benzene. The catalyst mainly solves the technical problems that yield of by-product cyclohexane is high and yield of main product cyclohexylbenzene is low in a reaction caused by a catalyst in the prior art. The catalyst for synthesis of cyclohexylbenzene comprises a carrier and the following active components: (1) 0.5-20g / L of Pd; and (2) 0-40g / L of at least one of lanthanoid elements, wherein the carrier is hydrogen-type zeolite molecular sieves. By employing the technical scheme, better effect is obtained, and the catalyst can be used to the one-step method of preparing cyclohexylbenzene through the hydroalkylation of benzene.

Description

technical field [0001] The invention relates to a catalyst for synthesizing cyclohexylbenzene, 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74C07C2/74C07C13/28
CPCB01J29/7415B01J2229/186C07C2/74C07C13/28
Inventor 韩亚梅王德举刘仲能唐之勤赵斌
Owner CHINA PETROLEUM & CHEM CORP
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