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B/L acid-modified organosilicon sphere catalyst, and preparation and application thereof

A catalyst and organosilicon technology, applied in B/L acid-modified organosilicon ball catalyst and its preparation and application field

Active Publication Date: 2018-10-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on this type of catalyst and its application in the decomposition of cyclohexyl hydroperoxide

Method used

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  • B/L acid-modified organosilicon sphere catalyst, and preparation and application thereof
  • B/L acid-modified organosilicon sphere catalyst, and preparation and application thereof
  • B/L acid-modified organosilicon sphere catalyst, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Catalyst M-S-BIM-SiO 2 preparation

[0016] The preparation of the organosilicon spheres modified by the B / L acid can be operated in the following steps:

[0017] First, add 100mL of methanol, 10mL of ammonia water with a mass fraction of 28% and 30mL of deionized water into a 250mL three-necked flask, stir mechanically for 30 minutes, and then add 3.36g of ethyl orthosilicate and 0.19g of 3-chloro The precursor of propyltriethoxysilane was stirred at 60°C for 3 hours, centrifuged and washed with water to prepare organosilicon spheres for catalysts. Suspend 2 g of the prepared silicone spheres in 30 mL of toluene solution, drop an excess of 0.2 g of diimidazolidine, reflux at 120° C. for 12 hours, centrifuge and wash with water to prepare bis-imidazolidinyl-modified silicone spheres. Suspend 2 g of the prepared bis-imidazolidinyl-modified silicone spheres in 50 mL of toluene solution, add 0.35 g of excess 1,4-butane sultone dropwise into the suspension, stir the mixed...

Embodiment 2

[0019] Catalyst Cu-S-BIM-SiO 2 preparation

[0020] Heterogeneous Catalyst Cu-S-BIM-SiO 2 The preparation method and M-S-BIM-SiO in Example 1 2 The preparation is the same, the difference is that the transition metal chloride salt used is CuCl 2 .

Embodiment 3

[0022] Catalyst Co-S-BIM-SiO 2 preparation

[0023] Heterogeneous Catalyst Co-S-BIM-SiO 2 The preparation method and M-S-BIM-SiO in Example 1 2 The preparation is the same, the difference is that the transition metal chloride salt used is CoCl 2 .

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PUM

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Abstract

The invention relates to the preparation and application of a B / L acid modified organosilicon sphere catalyst. According to the invention, a cyclohexane solution of cyclohexyl hydroperoxide is used asa raw material and a B / L acid-modified organosilicon sphere is used as a catalyst to achieve high-efficiency decomposition of cyclohexyl hydroperoxide under mild conditions, so cyclohexanol and cyclohexanone are produced. The catalyst has high selectivity to cyclohexanol and cyclohexanone, and can be recycled.

Description

technical field [0001] The invention relates to a method for preparing cyclohexanol and cyclohexanone by decomposing cyclohexyl hydroperoxide under alkali-free conditions using nanometer silicon balls wrapped with silicon source modified by Bronsted acid and Lewis acid as catalyst. Background technique [0002] The oxidation of cyclohexane to cyclohexanol and cyclohexanone (K / A oil) is an important petrochemical process. At present, cyclohexane oxidation mainly adopts a two-step method. First, cyclohexane is oxidized without catalyst under high temperature conditions to produce cyclohexyl hydroperoxide, and then, under the catalysis of sodium hydroxide and cobalt salt, it is decomposed to produce cyclohexanol and cyclohexanone. The sodium hydroxide added in this method generates a large amount of alkaline waste water to pollute the environment and cause corrosion to the equipment. It is of great scientific significance and application background to develop a new type of al...

Claims

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Application Information

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IPC IPC(8): B01J31/02C07C27/00C07C35/08C07C45/53C07C49/303
CPCB01J31/0284C07C27/00C07C45/53C07C35/08C07C49/303
Inventor 郑玺徐杰孙志强高进杜文强石松
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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