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Catalyst for preparing cyclohexanol by hydration of cyclohexene and its preparation and application method

A cyclohexene hydration and catalyst technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve complex separation of catalysts and reaction products, and difficult corrosion problems Solve the problems of homogeneous catalyst corrosion and other problems, and achieve the effect of easy regeneration and repeated use, no corrosion of equipment, and good stability

Inactive Publication Date: 2011-11-30
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 and its preparation and application method
  • Catalyst for preparing cyclohexanol by hydration of cyclohexene and its preparation and application method
  • Catalyst for preparing cyclohexanol by hydration of cyclohexene and its preparation and application method

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Experimental program
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Effect test

Embodiment 1

[0018] (1) Place a 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 to it, and react at 60°C for 48 hours. After the reaction mixture was taken out, the water was distilled off under reduced pressure to obtain a white solid. The solid was washed with absolute ethanol, toluene and anhydrous ether in sequence, and then vacuum dried at 80°C to a constant weight.

[0019] (2) Put the solid obtained in the first step into a flask, add 1.0 mol 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 to constant weight at 80°C to obtain HZSM-5 supported B acid ionic liquid N, N, N-trimethyl-N-sulfobutyl-ammonium hydrogen sulfate catalyst.

Embodiment 2、3

[0021] The preparation method is the same as in Example 1, except that the amount of 1,4-butane sultone in step (1) is changed to 0.8 mol and 1.2 mol, respectively, to obtain the required HZSM-5 load B acidity of the present invention. Ionic liquid N, N, N-trimethyl-N-sulfobutyl-ammonium hydrogen sulfate catalyst.

Embodiment 4、5

[0023] The preparation method is the same as in Example 1, except that the amount of HZSM-5 in step (1) is changed to 100 g and 150 g respectively to prepare the HZSM-5 supported B acidic ionic liquid N, N, N-Trimethyl-N-sulfobutyl-ammonium hydrogen sulfate 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 HZSM-5 supported B acid type N, N, N-trimethyl-N-sulfobutyl-ammonium hydrogen sulfate ionic liquid catalyst and its preparation And application method. Background technique [0002] Cyclohexanol is an important saturated alicyclic alcohol. It is an important intermediate of caprolactam and adipic acid, the raw materials for the production of nylon 6 and nylon 66. In the coating industry, cyclohexanol is often used as a solvent for paints, shellacs and varnishes. Because it is not volatile, it improves the secondary flow and prevents the paint film from darkening. In addition, cyclohexanol can also be used in disinfectants, fragrances, pesticides, fungicides, leather softeners and wood preservatives. [0003] The preparation of cyclohexanol from cyclohexene is usually carried out by cyclohexene hydration reaction. The cyclohexene hydration reaction is an a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C07C35/08C07C29/04
Inventor 薛伟杜文明李芳王延吉
Owner HEBEI UNIV OF TECH
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