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A method for comprehensive utilization of lignocellulosic biomass to prepare energy chemicals

A lignocellulose and biomass technology, applied in biochemical equipment and methods, lignin derivatives, microbial-based methods, etc., can solve problems such as waste of resources, achieve cost savings, improve economy, and improve stability Effect

Active Publication Date: 2018-02-13
中科柏易金(郑州)新能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a technical route that uses corn cob hydrolysis to obtain pentose sugar liquid, and then ferments it to produce n-butanol, while the remaining large amount of cellulose is used as fuel and burned for heat, resulting in a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Biomass multi-component separation:

[0035] Take 10kg of corn cob powder (less than 20 mesh), add dilute sulfuric acid aqueous solution (concentration: 0.1 mol / liter) and treat at 80°C for 12 hours according to the material / solution ratio of 1:6 (dry weight), filter, and add sodium hydroxide to the filtrate , adjust the pH value to 6.5 to obtain xylose hydrolyzate (pentose sugar content 5%);

[0036] Add NaOH solution (concentration 0.5 mol / liter) to the solid material obtained by filtration, and treat it at 50°C for 6 hours according to the material / solution ratio of 1:10 (dry weight) to dissolve and separate lignin. Then filter and wash the solid material to a pH value of 8, resulting in 5 kg of cellulose material (dry basis weight);

[0037]Hydrochloric acid was added to the NaOH filtrate containing lignin to adjust the pH value to 6.5, and the precipitate was filtered to obtain 1.5 kg (dry weight) of a solid lignin product.

[0038] Biological fermentation proces...

Embodiment 2

[0048] The conditions for the catalytic conversion of cellulose were the same as in Example 1, except that the hydrogenation catalyst 0.5%Ru-10%Ni / AC was replaced by 0.2%Ru-Raney Ni, and the dosage was reduced to 0.15kg. After the reaction, the yield of ethylene glycol was 48%, and the yield of propylene glycol was 8%. It is shown that the two hydrogenation catalysts have similar catalytic performance.

Embodiment 3

[0053] Catalyst stability test: The conditions for cellulose catalytic conversion are the same as in Example 2, except that the hydrogenation catalyst is replaced by a fresh 0.2% Ru-Raney Ni catalyst with the recovered catalyst 0.2% Ru-Raney used once in Example 2 Ni. After the reaction, the yield of ethylene glycol was 47%, and the yield of propylene glycol was 8%.

[0054] It can be seen that the activity of the 0.2% Ru-Raney Ni catalyst has no obvious attenuation during repeated use and has good stability.

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Abstract

The invention relates to a method for preparing energy chemicals by virtue of comprehensive utilization of lignocelluloses biomass. The method comprises the steps of carrying out multi-component separation, biological fermentation and catalytic conversion on raw materials including corncobs, corn straw, sorghum straw, wheat straw, rice straw, cotton straw, rice hull, wheat bran, peanut shell, sunflower seed shell and palm empty fruit bunches, so as to simultaneously obtain products including acetone, n-butyl alcohol, ethanol, glycol, propanediol and lignin. According to the method, the utilization of all components of agricultural waste biomass is realized and the energy chemicals are produced; the method has the advantages of high product yield and good economy.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing lignocellulosic biomass to produce energy chemicals. Specifically, acetone and n-butanol are simultaneously obtained through multi-component separation, biological fermentation and catalytic conversion processes using agricultural waste as raw materials. , ethanol, ethylene glycol, propylene glycol, and lignin products. Background technique [0002] With the continuous development of the world economy, traditional fossil energy such as petroleum and coal cannot meet the needs of sustainable development of human society due to limited and non-renewable resources, and the emission of carbon dioxide leads to global warming. Due to its renewable nature and wide range of sources, biomass resources have become an important way to partially replace fossil energy resources and solve energy and environmental challenges. [0003] Crop wastes, such as corn cobs, corn stalks, and peanut shells, are r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/02C13K13/00C12P7/10C12P7/16C12P7/36C08H7/00C08B37/14D21C5/00C07C31/20C07C29/00C12R1/145
CPCC07C29/00C07G1/00C08B37/14C12P7/10C12P7/16C12P7/36C12P2203/00C13K13/002D21C5/005C07C31/202C07C31/205Y02E50/10
Inventor 郑明远张涛庞纪峰姜宇王爱琴
Owner 中科柏易金(郑州)新能源科技有限责任公司