Cobalt catalyst used for catalyzing o-methoxy-phenol to prepare cyclohexanol and preparation method of cobalt catalyst

A technology of o-methoxyphenol and catalyst, applied in the field of metal cobalt catalyst and preparation thereof, can solve the problems of improvement, unfavorable economic benefits, etc., and achieves the advantages of improved dispersibility and reducibility, improved hydrodeoxygenation activity, and improved selectivity. Effect

Active Publication Date: 2018-05-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the hydration of cyclohexene is limited by the chemical balance, its conversion rate can only reach 12%, and the unreacted cyclohexene needs to be distilled repeatedly, which is not conducive to the improvement of economic benefits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 14.8g Co(NO 3 ) 2 ·6H 2 O, 4.0g ZrOCl 2 ·8H 2 O and 2.7g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 100ml of deionized water and stirred to form a mixed solution of metal salts. Add 9.2g of anhydrous Na 2 CO 3 Dissolve in 100ml deionized water and stir to form Na 2 CO 3 Solution, the above two solutions were slowly added dropwise to 200ml of deionized water at the same time in a water bath at 50°C and stirred vigorously for 1 hour to form a purple precipitate. The pH value of the filtrate obtained after suction filtration is 8-9, the precipitate is washed thoroughly with deionized water until the filtrate is neutral, and the precipitate is added to 200 ml of n-butanol. Evaporate in a water bath at 50°C for 12h, and then dry it in an oven at 80°C for 12h to obtain the catalyst precursor, press and grind it to sieve out 20-40 mesh particles, pass hydrogen into a fixed bed, and reduce at 450°C for 3~ 5h, get the hydrogenation catalyst.

[0026] In a fixed-bed reactor, add 0.2g of c...

Embodiment 2

[0028] Take 2.3g ZrOCl 2 ·8H 2 O and 4.7g Ce(NO 3 ) 3 ·6H 2 O instead of 4.0g ZrOCl in Example 1 2 ·8H 2 O and 2.7g Ce(NO 3 ) 3 ·6H 2 O, the other steps are the same as in Example 1.

Embodiment 3

[0030] Take 2.8g ZrOCl 2 ·8H 2 O and 3.8g Ce(NO 3 ) 3 ·6H 2 O instead of 4.0g ZrOCl in Example 1 2 ·8H 2 O and 2.7g Ce(NO 3 ) 3 ·6H 2 O, the other steps are the same as in Example 1.

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PUM

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Abstract

The invention relates to a cobalt catalyst used for catalyzing o-methoxy-phenol to prepare cyclohexanol and a preparation method of the cobalt catalyst. The cobalt catalyst comprises a carrier and cobalt and is prepared by a coprecipitation method. The prepared cobalt catalyst is quite high in cyclohexanol selectivity. The invention mainly relates to influence of active components loaded onto composite metal oxide carriers of different proportions on the catalytic reaction of o-methoxy-phenol. An application method of the cobalt catalyst includes: using the o-methoxy-phenol as the raw material, using a high-pressure constant flow pump to convey the raw material into a fixed bed reactor to perform reaction for 2-5 hours under 100-260 DEG C, and performing gas chromatography on obtained condensate. Results show that the cobalt catalyst is cheap in raw material, simple in preparation method, uniform in active component distribution, high in reaction activity and high in cyclohexanol yield.

Description

Technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a metal cobalt catalyst used for catalyzing o-methoxyphenol to prepare cyclohexanol and a preparation method thereof. Background technique [0002] According to incomplete statistics, my country produces about 300 million tons of forestry residues and 700 million tons of straw each year. The production of cellulosic ethanol and butanol from agricultural and forestry residues as raw materials has become important for the second generation of biomass energy. Direction of development. In the biorefinery process, a large amount of highly active lignin is produced. Lignin is the main component of lignocellulosic biomass and the main by-product of lignocellulosic biomass hydrolysis and fermentation to ethanol industry and papermaking industry. Because it is not fully utilized, it becomes an environmental pollutant and serious pollution Environment. In this context, the resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/00B01J37/03C07C29/19C07C35/08
CPCB01J23/002B01J23/83B01J37/00B01J37/031C07C29/172C07C29/175C07C29/19C07C35/08Y02P20/52
Inventor 鲁墨弘吉新孙雨李明时
Owner CHANGZHOU UNIV
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