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Method for preparing ketone compounds by transferring ABE fermentation solution

A technology for ketone compounds and fermentation broth, applied in the field of preparing high carbon ketones, can solve the problems of uncontrollable degree of condensation, catalyst poisoning and the like, and achieve the effects of good stability and simple preparation

Active Publication Date: 2019-03-05
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

[0003] However, due to the active chemical properties of the main three main components in ABE, the degree of condensation cannot be controlled during the catalytic reaction, so the obtained products are complex product mixtures
And ABE fermentation broth often has a lot of water, which usually has a poisoning effect on the catalyst, and the water removal process will generate a lot of energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Catalyst preparation

[0010] Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add ammonia water to adjust the pH=11, stir for 4h, filter, dry, and calcinate at 500°C for 4h to obtain 10g of cerium oxide.

[0011] Preparation of high-carbon ketones

[0012] The 14-25 mesh catalyst is taken by the forming sieve and filled into the reaction tube, and the bed is filled with 6 cm. In the raw material ABE, acetone:butanol=1:10 (mass ratio), acetone:ethanol=5:1 (mass ratio), and the water content in the fermentation broth is 25% (volume ratio). The mass space velocity of ABE fermentation broth is 0.1h -1 . The reaction was carried out at 420° C., sampling and chromatographic analysis were performed every 2 hours. The conversion rate of the total carbon number in the raw materials was 75%, the selectivity of 4-heptanone was 75%, and the selectivity of 2-pentanone was 20%.

Embodiment 2

[0014] Catalyst preparation

[0015] Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add a mass concentration of -27% ammonia water to adjust pH=11, stir for 4h, filter, dry, and calcinate at 500°C for 4h to obtain 10g of cerium oxide.

[0016] Preparation of high-carbon ketones

[0017] The 14-25 mesh catalyst is taken by the forming sieve and filled into the reaction tube, and the bed is filled with 6 cm. In the raw material ABE, acetone:butanol=1:10 (mass ratio), acetone:ethanol=5:1 (mass ratio), and the water content in the fermentation broth is 25% (volume ratio). The mass space velocity of ABE fermentation broth is 0.5h -1 . The reaction was carried out at 420° C., sampling and chromatographic analysis were performed every 2 hours. The conversion rate of the total carbon number in the raw materials was 60%, the selectivity of 4-heptanone was 70%, and the selectivity of 2-pentanone was 20%.

Embodiment 3

[0019] Catalyst preparation

[0020] Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add a mass concentration of -27% ammonia water to adjust the pH=11, stir for 4h, filter, dry, and calcinate at 500°C for 4h to obtain 10g of cerium oxide.

[0021] Preparation of high-carbon ketones

[0022] The 14-25 mesh catalyst is taken by the forming sieve and filled into the reaction tube, and the bed is filled with 6 cm. In the raw material ABE, acetone:butanol=1:10 (mass ratio), acetone:ethanol=5:1 (mass ratio), and the water content in the fermentation broth is 25% (volume ratio). The mass space velocity of ABE fermentation broth is 0.8h -1 . The reaction was carried out at 420° C. and sampling and chromatographic analysis were performed every 2 hours. The conversion rate of total carbon in the raw materials was 53%, the selectivity of 4-heptanone was 72%, and the selectivity of 2-pentanone was 20%.

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Abstract

The invention relates to a method for preparing ketone compounds. According to the method, an ABE fermentation solution (acetone-butanol-ethanol water solution) is adopted as a reactant, and the ketone compounds are prepared through a reaction under catalysis of a cerium-based composite oxide. The reaction conditions are as follows: the reaction is carried out at normal pressure in a fixed bed reactor, a reaction temperature is 350-500 DEG C, and a feeding mass space velocity of the ABE is 0.1-2.0 h<-1>. The method is characterized in that the cerium-based composite oxide is used as the catalyst, the catalyst is simple to prepare and has good stability, the ketone compounds are generated through efficiently catalyzing the ABE, the conversion rate is up to 95% (based on the total carbon number), and the total selectivity of the ketone compounds can reach 99%, wherein the selectivity of 4-heptanone is 92%, and the selectivity of 2-pentanone is 8%.

Description

Technical field [0001] The invention relates to a method for preparing ketone compounds, in particular to a method for preparing high-carbon ketones by using ABE fermentation broth as a reactant. Background technique [0002] In today's world, with the development of industry, the consumption of fossil fuels is increasing year by year. Due to its non-renewability, it is already facing the possibility of resource exhaustion. Therefore, it has attracted more and more attention as a renewable bioenergy. Biological fermentation is a very important way to obtain chemicals from biomass. Among them, ABE (acetone-butanol-ethanol) is obtained by fermentation of glucose (starch, lignocellulose, etc.) under the action of Bacillus acetobutylicum. In recent years, there have been successive literature reports (Anbarasan, P.; Baer, ​​ZC; Sreekumar, S.; Gross, E.; Binder, JB; Blanc, HW; Clark, DS; Toste, FDNature 2012, 491, 235; Xu ,GQ;Li,Q.;Feng,JG;Liu,Q.;Zhang,ZJ;Wang,XC;Zhang,XY;Mu,XDChem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/04C07C45/68B01J23/10B01J23/83B01J23/14B01J23/26B01J23/20B01J37/03B01J37/08
CPCB01J23/002B01J23/10B01J23/14B01J23/20B01J23/26B01J23/83B01J37/031B01J37/082C07C45/68C07C49/04
Inventor 王峰王业红张健张志鑫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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