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Process for producing polyatomic sugar alcohol and lignin by comprehensively using agricultural and forestry wasters of corncobs

A technology of agricultural and forestry waste and polysaccharide alcohol, applied in the field of biochemical industry, can solve the problems of only being burned or discarded, and lack of application channels

Inactive Publication Date: 2012-11-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most types of lignin can only be burned or discarded due to lack of application methods, so it is urgent to find new utilization methods through appropriate chemical and physical methods to turn waste into treasure

Method used

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  • Process for producing polyatomic sugar alcohol and lignin by comprehensively using agricultural and forestry wasters of corncobs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] 1. Example of corn cob pretreatment

[0058](1) Choose agricultural and forestry waste corncobs as raw materials, crush the corncobs to 10% and add dilute sulfuric acid solution with a mass fraction of 0.2%, the solid-liquid ratio is 1:4, the soaking temperature is 30°C, and the soaking time is After soaking for 24 hours, use plate-and-frame filtration to separate the soaking system from solid to liquid to obtain pretreated raw materials and soaking liquid. The soaking liquid can be used repeatedly, and the solid raw materials are washed with water until nearly neutral.

[0059] (2) Insert the pre-cultivated white rot fungus seed liquid into the wet corncob, keep the humidity at 75%, the volume-to-mass ratio of the seed liquid to the corncob is 0.05ml / g corncob (dry weight), and the culture temperature is 28°C, pretreatment time is 40 days, in which the content of lignin is reduced by 40%, which is beneficial to the next step of degradation of hemicellulose; the medium ...

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Abstract

The invention belongs to the biochemical industry field and particularly relates to a novel process for producing the polyatomic sugar alcohol and the lignin by comprehensively using agricultural and forestry wasters of corncobs. The process includes preprocessing raw materials by using a chemical or biological method, and producing a xylose hydrolysate in a high-temperature digesting or steam blasting mode to produce xylose products or xylitol products through a biological method. According to the process for producing the polyatomic sugar alcohol and the lignin by comprehensively using agricultural and forestry wasters of corncobs, ingredients of cellulose and lignin contained in the raw materials are fully used to develop and produce corresponding products.

Description

Technical field: [0001] The invention belongs to the field of biochemical industry, and in particular relates to a new process for producing polysaccharide alcohols and lignin compounds by comprehensively utilizing agricultural and forestry waste materials such as corncobs. Background technique: [0002] Lignocellulose is the largest renewable resource and the most important biomass resource on the earth. Only terrestrial plants produce about 50 billion tons of cellulose every year, and lignocellulose accounts for 60%-80% of the total biomass on the earth. How to comprehensively and efficiently utilize these biomass resources is an important issue related to resources, environment, economy, energy and so on. In order to solve this problem, in recent years, major western countries and some developing countries have invested a lot of manpower and material resources in the research and development of cellulose resource transformation, especially in my country. Rich sources, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/18C08H7/00C12R1/74C12R1/22
Inventor 袁其朋王乐朱新涛
Owner BEIJING UNIV OF CHEM TECH
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