Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for treating corn stalks with steam explosion system n-methyl-n-oxide morpholine

A technology of corn stalks and oxidized morpholine, which is applied in the field of chemical engineering, can solve problems such as hydrochloric acid environmental pollution, and achieve the effects of avoiding acid and alkali corrosion, efficient pretreatment and saccharification, and less waste

Active Publication Date: 2019-09-03
PETROCHINA CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for pretreating corn stalks with steam explosion system N-methyl-N-morpholine oxide, so as to overcome the defect that the use of hydrochloric acid in the prior art is likely to cause environmental pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for treating corn stalks with steam explosion system n-methyl-n-oxide morpholine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the pretreatment system, 0.2g of dry corn stalks was mixed with 85% (w / w) NMMO and 15% (w / w) (mass ratio of straw, NMMO, water: 2:85:15) at 110 After pretreatment for 2 hours under the conditions of ℃ and 0.078MPa, water was added to obtain a regenerated cellulose material. After the regenerated cellulose material was washed with water for 3 times, pH=4.8 acetic acid-sodium acetate buffer solution (50mmol / L) was added to form a mixed system, the final mass concentration of corn stalks was 20g / L, and cellulase was added (the dosage of cellulase was 30FPU / g substrate) to carry out enzymolysis, shake reaction 72h on the constant temperature shaker of 50 ℃ and 180rpm, the yield of reducing sugar is 65.3%, and the yield of glucose is 34.8% ( figure 1 ).

Embodiment 2

[0029] In the pretreatment system, 0.2g of dry corn stalks was mixed with 85% (w / w) NMMO-15% (w / w) water (mass ratio of straw, NMMO, water: 2:85:15) at 120 After the corn stover was pretreated for 0.75 h under the conditions of ℃ and 0.13 MPa, water was added to obtain the regenerated cellulose material. After the regenerated cellulose material was washed with water for 4 times, pH=4.8 acetic acid-sodium acetate buffer solution (50mmol / L) was added to form a mixed system, the final mass concentration of corn stalks was 20g / L, and cellulase was added (the dosage of cellulase was 30 FPU / g substrate) for enzymolysis, shaking reaction on a constant temperature shaker at 50°C and 180rpm for 72h, the yield of reducing sugar was 65.1%, and the yield of glucose was 34.7%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for processing corn stalks by virtue of a steam explosion system N-methyl-N-morpholine oxide. The method comprises the following steps:1, pre-processing a corn stalk raw material in an oxidizing N-methyl-N-morpholine oxide-water mixed system; 2, adding water so as to promote regeneration of cellulose dissolved in the pre-processing process; and 3, washing the cellulose material obtained from the regeneration for 3-5 times, adding an acetic acid-sodium acetate buffer solution, so that a mixed system is formed, then conducting enzymatic hydrolysis by virtue of cellulase, and conducting an oscillating reaction on a constant-temperature shaker, so that the purpose of saccharifying corn stalk cellulose. Compared with a conventional thermo-chemical treatment method, the method disclosed by the invention can reduce processing temperature to 110-130 DEG C, so that energy consumption is effectively reduced; meanwhile, a recovery rate of processed cellulose and hemicellulose can reach 80-90%; the NMNMO (N-methyl-N-morpholine oxide) can be recycled and repeatedly used; and in addition, the method has the characteristics of being capable of avoiding stirring, economic in process, low in content of three wastes and the like.

Description

technical field [0001] The invention relates to a method for pretreating corn stalks with a steam explosion system N-methyl-N-oxidized morpholine, which belongs to the field of chemical engineering, and specifically belongs to the raw material pretreatment technology in the process of using biomass cellulose to produce fuel ethanol. Background technique [0002] With the rapid population growth, in order to solve the growing food and energy crisis, the utilization of cellulose resources has attracted great attention and attention from all over the world. my country is a large agricultural country, rich in lignocellulose resources, and produces nearly 700 million tons of crop straw every year. Lignocellulosic raw materials are mainly composed of cellulose, hemicellulose and lignin, and form a complex dense structure. It is generally believed that the presence of lignin affects the enzymatic hydrolysis rate of cellulose. Therefore, to increase the enzymatic hydrolysis rate of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/14C12P19/02
Inventor 岳军张跃朱庆伟何玉财刘海军严生虎王继艳卿青
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com