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Catalyst for preparing cyclohexanol by hydration of cyclohexene as well as preparation method and application method thereof

A technology of cyclohexene hydration and application method, which is applied in the field of synthesis of cyclohexanol, can solve the problems of complicated separation of catalyst and reaction product, difficult to solve corrosion problem, corrosion of homogeneous catalyst, etc., and achieve easy regeneration and repeated use, no Corrosion equipment, good stability effect

Inactive Publication Date: 2013-12-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of homogeneous catalysts for hydration reactions has its disadvantages: the corrosion of acid catalysts to reaction equipment is difficult to solve, and there are serious environmental protection problems; the separation of catalysts and reaction products is complicated; the amount of catalysts relative to cyclohexene is higher than that of solid acid catalysts
[0006] From the above-mentioned prior art, in the production process of preparing cyclohexanol by hydration of cyclohexene, the homogeneous catalyst corrodes the equipment and is difficult to separate and recover; while the existing heterogeneous catalyst has the disadvantages of low activity and long reaction time

Method used

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  • Catalyst for preparing cyclohexanol by hydration of cyclohexene as well as preparation method and application method thereof
  • Catalyst for preparing cyclohexanol by hydration of cyclohexene as well as preparation method and application method thereof
  • Catalyst for preparing cyclohexanol by hydration of cyclohexene as well as preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Put trimethylamine aqueous solution containing 1.0 mole of trimethylamine and 1.0 mole of 1,4-butane sultone in a flask, add 50 g of HZSM-5 therein, and react at 60° C. for 48 hours. After the reaction mixture was taken out, water was distilled off under reduced pressure to obtain a white solid, which was washed successively with absolute ethanol, toluene and absolute ether, and then vacuum-dried at 80°C to constant weight.

[0019] (2) Put the solid obtained in the first step into a flask, add 1.0 mole of concentrated sulfuric acid at 5°C, raise the temperature to 60°C, and react for 5 hours. Wash with deionized water, filter, and vacuum dry at 80°C to constant weight to obtain HZSM-5 loaded B acidic ionic liquid N,N,N-trimethyl-N-sulfobutyl-ammonium bisulfate catalyst.

Embodiment 2、3

[0021] Same as the preparation method of Example 1, just change the 1,4-butane sultone consumption in the step (1) to be 0.8 moles and 1.2 moles respectively, to obtain the required HZSM-5 loaded B acidic acid of the present invention respectively. Ionic liquid N,N,N-trimethyl-N-sulfobutyl-ammonium bisulfate catalyst.

Embodiment 4、5

[0023] Identical to the preparation method of Example 1, just change the HZSM-5 consumption in step (1) to be 100 grams and 150 grams respectively, make respectively required HZSM-5 loaded B acidic ionic liquid N of the present invention, N, N-Trimethyl-N-sulfobutyl-ammonium bisulfate catalyst.

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Abstract

The invention relates to a catalyst for preparing cyclohexanol by hydration of cyclohexene. The catalyst is composed of a carrier (HZSM-5) and a supported active component (B-acid-type N,N,N-trimethyl-N-sulfobutyl-ammonium bisulfate ionic liquid). The application method of the catalyst for preparing cyclohexanol by hydration of cyclohexene comprises the following steps: adding the catalyst, cyclohexene and water to a reactor, wherein the mass ratio of catalyst to cyclohexene to water is 1:(5-50):(50-500); and raising the reaction temperature to 80-180 DEG C and reacting for 1-6 hours to obtain cyclohexanol. The catalyst prepared by the preparation method is easy to separate and recover, does not corrode equipment and is environmentally friendly. Compared with the original methods for preparing cyclohexanol by non-homogeneous catalytic hydration of cyclohexene, the invention has the advantages that the catalyst has the advantages of high activity, high reaction rate and good selectivity.

Description

technical field [0001] The technical scheme of the present invention belongs to the synthesis of cyclohexanol, specifically a kind of HZSM-5 loaded B acid type N, N, N-trimethyl-N-sulfobutyl-ammonium bisulfate ionic liquid catalyst and its preparation and application methods. Background technique [0002] Cyclohexanol is an important saturated alicyclic alcohol, which is an important intermediate of caprolactam and adipic acid, the raw materials for the production of nylon 6 and nylon 66. In the paint industry, cyclohexanol is often used as a solvent for paint, shellac and varnish. Because it is not volatile, it improves the secondary flow, so that the paint film does not darken. In addition, cyclohexanol can also be used in the fields of disinfectants, fragrances, insecticides, fungicides, leather softeners and wood preservatives. [0003] The preparation of cyclohexanol from cyclohexene is usually carried out through the hydration reaction of cyclohexene. The cyclohexen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02
Inventor 薛伟杜文明李芳王延吉
Owner HEBEI UNIV OF TECH