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High-carbon ketone preparation method

A high-carbon ketone and acetone technology, applied in the field of high-carbon ketone preparation, can solve the problems of catalyst poisoning, uncontrollable condensation degree, etc., and achieve the effect of wide sources and great application prospects

Active Publication Date: 2018-05-08
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 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

[0024] Catalyst preparation

[0025] The preparation of the catalyst adopts the precipitation method. 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 roast at 500°C for 4h to obtain 10g of cerium oxide.

[0026] Preparation of high carbon ketones

[0027] The forming sieve takes 14-25 mesh catalyst and fills it into the reaction tube, fills the 5cm bed layer, the raw material ABE fermentation liquid, the fermentation liquid is composed of acetone, butanol, ethanol, and the molar ratio of acetone: butanol: ethanol is 1:7: 2. The water content in the fermentation broth is 20% (volume). The mass space velocity of the ABE fermentation broth is 0.5h -1 . Reaction at 400°C, sampling chromatographic analysis every 2h, the conversion rate of ABE is 50% (based on total carbon number), the selectivity of 4-heptanone is 75%, the selectivity of 2-pentanone is 20%, 2 - Selectivity to heptano...

Embodiment 2

[0029] Catalyst preparation

[0030] The preparation of the catalyst adopts the precipitation method. 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 roast at 500°C for 4h to obtain 10g of cerium dioxide.

[0031] Preparation of high carbon ketones

[0032] The forming sieve takes 14-25 mesh catalyst and fills it into the reaction tube, fills the 10cm bed layer, the raw material ABE fermentation broth, the fermentation broth is composed of acetone, butanol and ethanol, and the molar ratio of acetone:butanol:ethanol is 1:7: 2. The water content in the fermentation broth is 20% (volume). The mass space velocity of the ABE fermentation broth is 0.5h -1 . React at 400°C, sample chromatographic analysis every 2h, the conversion rate of ABE is 68% (based on the total carbon number), sample analysis every 2h, the selectivity of 4-heptanone is 78%, the selection of 2-pentanone The speci...

Embodiment 3

[0034] Catalyst preparation

[0035] The preparation of the catalyst adopts the precipitation method. 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 roast at 500°C for 4h to obtain 10g of cerium dioxide.

[0036] Preparation of high carbon ketones

[0037] The forming sieve takes 14-25 mesh catalyst and fills it into the reaction tube, fills the 10cm bed layer, the raw material ABE fermentation broth, the fermentation broth is composed of acetone, butanol and ethanol, and the molar ratio of acetone:butanol:ethanol is 1:7: 2. The water content in the fermentation broth is 10% (volume), and the mass space velocity of the ABE fermentation broth is 0.5h -1 . Reaction at 420 DEG C, sampling chromatographic analysis every 2h, the conversion rate of ABE is 72% (based on total carbon number), the selectivity of 4-heptanone is 79%, the selectivity of 2-pentanone is 10%, 2 - Selectivity t...

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Abstract

The invention relates to a high-carbon ketone preparation method, wherein the raw material is an ABE fermentation broth, the catalyst is cerium oxide, the product is high-carbon ketone, and the reaction temperature is 350-500 DEG C. According to the present invention, the catalyst of the method has advantages of simple preparation and good stability, and can efficiently catalyze to selectively generate the high-carbon ketone, wherein the conversion rate is up to 72% (based on the total carbon number), the highest selectivity of the product high-carbon ketone can reach 98%, the 4-heptanone selectivity is 80%, the 2-pentanone selectivity is 15%, and the 2-heptanone selectivity is 3%.

Description

technical field [0001] The invention relates to a method for preparing high-carbon ketones, in particular to a method for preparing high-carbon ketones by using ABE fermentation liquid 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 their non-renewable nature, they are already facing the possibility of resource depletion. Therefore, it has attracted more and more attention as a renewable bioenergy source. Biofermentation is a very important way to obtain chemicals from biomass. Among them, ABE (acetone-butanol-ethanol) is obtained by fermenting glucose (starch, lignocellulose, etc.) under the action of Bacillus acetobutylicum. In recent years, there have been literature reports (Anbarasan, P.; Baer, ​​Z.C.; Sreekumar, S.; Gross, E.; Binder, J.B.; Blanch, H.W.; Clark, D.S.; Toste, F.D. Nature 2012, 491, 235; Xu , G.Q.; Li, Q.; Feng, J.G.; Liu, Q.; Zhang, Z.J....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/04C07C45/74B01J23/10
CPCB01J23/10C07C45/002C07C45/74C07C49/04C07C47/06C07C47/02
Inventor 王峰王业红张健张志鑫侯婷婷安静华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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