Preparing cyclohexene catalyst and for benzene hydrogenation its manufacturing method

A technology of cyclohexene and catalyst, which is applied in the field of new industrial catalysts and preparations of cyclohexene from hydrogenation of benzene, can solve the problems of long reaction time and low catalyst activity, and achieve easy availability of raw materials, low comprehensive cost and cheap price Effect

Inactive Publication Date: 2005-03-23
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the selectivity of some relevant patents in recent years has been improved, the reaction time is often too long, that is, the catalyst activity is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take a certain amount of RuCl 3 .3H 2 O, dissolved in pure water at room temperature; then accurately weigh a certain amount (accounting for about 10% of Ru in terms of metal) of ZnSO 4 ·7H 2 O, while adding RuCl 3 solution, stirred and dissolved to obtain solution 1;

[0028] Add nanoscale ZrO to solution 1 2 , Ru occupies ZrO 2 The mass percentage is 10%, stirred for about 1 hour to obtain solution 2;

[0029] Use 1.5 times the mass of RuCl 3 ·3H 2 The NaOH solution of O is added dropwise in the solution 2 under stirring, and the metal ions in the solution 2 are co-precipitated;

[0030] Join 9-1.1×10 -6 ZnSO 4 The solution was left to stand for stratification, the supernatant was poured out, and washed with deionized water for 1-2 times to obtain the product. The solid can be directly used in the benzene hydrogenation reaction without being separated from water.

Embodiment 2

[0032] Take a certain amount of RuCl 3 ·3H 2 O, dissolved in pure water at room temperature; then accurately weigh a certain amount (about 16% of Ru in terms of metal) of ZnSO 4 ·7H 2 O, while adding RuCl 3 solution, stirred and dissolved to obtain solution 1;

[0033] Add nanoscale ZrO to solution 1 2 , Ru occupies ZrO 2 The mass percentage is 13%, stirred for about 1 hour to obtain solution 2;

[0034] Use 1.5 times the mass of RuCl 3 ·3H 2 The NaOH solution of O is added dropwise in the solution 2 under stirring, and the metal ions in the solution 2 are co-precipitated;

[0035] Join 9-1.1×10 -6 ZnSO 4 The solution was left to stand for stratification, the supernatant was poured out, and washed with deionized water for 1-2 times to obtain the product. The solid can be directly used in the benzene hydrogenation reaction without being separated from water.

Embodiment 3

[0037] Take a certain amount of RuCl 3 ·3H 2 O, dissolved in pure water at room temperature; then accurately weigh a certain amount (about 20% of Ru in terms of metal) of ZnSO 4 ·7H 2 O, while adding RuCl 3 solution, stirred and dissolved to obtain solution 1;

[0038] Add nanoscale ZrO to solution 1 2 , Ru occupies ZrO 2 The mass percentage is 15%, stirred for about 1 hour to obtain solution 2;

[0039] Use 1.5 times the mass of RuCl 3 ·3H 2 The NaOH solution of O is added dropwise in the solution 2 under stirring, and the metal ions in the solution 2 are co-precipitated;

[0040] Join 9-1.1×10 -6 ZnSO 4 The solution was left to stand for stratification, the supernatant was poured out, and washed with deionized water for 1-2 times to obtain the product. The solid can be directly used in the benzene hydrogenation reaction without being separated from water.

[0041]Activity selectivity assay:

[0042] The catalyst obtained in Example 2 was chosen to measure the ac...

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PUM

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Abstract

A catalyst for preparing cyclohexene from benzene by hydrogenating is prepared from metal Ru, one or two transition metals or RE elements, the hydroxide of alkali metal as precipitator, and hydrophilic indifferent oxide. It has high activity and selectivity.

Description

Technical field: [0001] The invention belongs to the technical field of catalysts containing metals, oxides or hydroxides, and specifically relates to a novel industrial catalyst for producing cyclohexene by hydrogenation of benzene and a preparation method thereof. Background technique: [0002] Cyclohexene is an intermediate of many medicines and pesticides. It can be directly hydrated to generate cyclohexanol, directly oxidized to generate adipic acid, or oxidized to generate cyclohexanone by Wacker method. Cyclohexanol, cyclohexanone and adipic acid are important chemical raw materials. Cyclohexene has no natural products and must be chemically synthesized, and hydrogenation of benzene is the best route. In particular, the production of nylon 66 by partial hydrogenation of benzene is safer and more reliable than the traditional route of complete hydrogenation of benzene, consuming one-third less hydrogen, and the by-product is only cyclohexane, with a carbon yield of 10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/83B01J23/89C07C5/11C07C13/20
CPCY02P20/52
Inventor 刘寿长李利民王向宇
Owner ZHENGZHOU UNIV
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