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A metal cobalt catalyst for preparing cyclohexanol by catalyzing o-methoxyphenol and its preparation method

A technology of o-methoxyphenol and catalyst, which is applied in the field of metal cobalt catalyst and its preparation, can solve problems such as improvement and unfavorable economic benefits, and achieve the effects of improving dispersibility and reduction, improving hydrodeoxygenation activity, and increasing surface acidity Effect

Active Publication Date: 2020-10-09
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, and 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 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, and the precipitate is fully washed with deionized water until the filtrate becomes neutral, and the precipitate is added to 200 ml of n-butanol. Evaporate in a water bath at 50°C for 12 hours, then dry in an oven at 80°C for 12 hours to obtain the precursor of the catalyst, press it into a tablet and grind it, sieve out 20-40 mesh particles, pass hydrogen into the fixed bed, and reduce at 450°C for 3- 5h, the hydrogenation catalyst was obta...

Embodiment 2

[0028] With 2.3g ZrOCl 2 ·8H 2 O and 4.7g Ce(NO 3 ) 3 ·6H 2 O replaces 4.0g ZrOCl in Example 1 2 ·8H 2 O and 2.7g Ce(NO 3 ) 3 ·6H 2 O, other steps are with embodiment 1.

Embodiment 3

[0030] With 2.8g ZrOCl 2 ·8H 2 O and 3.8g Ce(NO 3 ) 3 ·6H 2 O replaces 4.0g ZrOCl in Example 1 2 ·8H 2 O and 2.7g Ce(NO 3 ) 3 ·6H 2 O, other steps are with embodiment 1.

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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 to catalyze 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 every year. Using agricultural and forestry residues as raw materials to produce cellulose ethanol and butanol through biorefining has become an important source of second-generation biomass energy. Direction of development. A large amount of highly active lignin is produced during the biorefinery process. Lignin is the main component of lignocellulosic biomass, and is the main by-product of the hydrolysis and fermentation of lignocellulosic biomass to ethanol industry and paper industry. Because it is not fully utilized, it has become an environmental pollutant and seriously polluted the enviro...

Claims

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Application Information

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Patent Type & Authority Patents(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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