Supercharge Your Innovation With Domain-Expert AI Agents!

Method for preparing phenolic substances through catalytic pyrolysis conversion of cellulose

A technology of catalytic pyrolysis and phenolic substances, applied in the field of cellulose catalytic pyrolysis conversion to prepare phenolic substances, to achieve the effect of improving the utilization value

Active Publication Date: 2015-02-18
BEIJING FORESTRY UNIVERSITY
View PDF12 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of cellulose to obtain phenolic substances with high application value has not been reported

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
  • Method for preparing phenolic substances through catalytic pyrolysis conversion of cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Taking the β-cellulose extracted from wheat straw as raw material to introduce the implementation process of the present invention is as follows:

[0036] Mix the cellulose raw material and HZSM-5 molecular sieve evenly at a mass ratio of 1:5, and react at 600°C for 5 seconds under a nitrogen atmosphere. The gas generated after the reaction reacts with chlorine gas under the action of an iron powder catalyst, and the reaction volume space velocity is 1000h -1 , the reaction temperature is 300°C, the reaction pressure is 0.1Mpa, and the reaction time is 30 seconds. The gas after the reaction is condensed at 0°C to generate liquid halogenated aromatic hydrocarbons; Hydrolyze under the condition of ℃, when the pH of the solution is 7.5, the material is discharged to obtain the hydrolyzed solution; carbon dioxide gas is passed into the hydrolyzed solution, and when the pH=4.5, the carbon dioxide gas is stopped to generate a neutralized hydrolyzed solution; Extract the neut...

Embodiment 3

[0041] Taking the microcrystalline cellulose extracted from rice straw as raw material to introduce the implementation process of the present invention is as follows:

[0042] Mix the cellulose raw material and HY molecular sieve evenly at a mass ratio of 1:30, and react at 650°C under a nitrogen atmosphere for 10 seconds. The gas generated after the reaction reacts with bromine chloride gas under the action of ferric chloride catalyst, and the reaction volume is empty Speed ​​is 5000h -1 , the reaction temperature is 500°C, the reaction pressure is 0.3Mpa, and the reaction time is 30 seconds. The gas after the reaction is condensed at a temperature of 10°C to generate liquid halogenated aromatic hydrocarbons; Hydrolyze under the condition of ℃, when the pH of the solution is 7, the material is discharged to obtain the hydrolyzed solution; carbon dioxide gas is passed into the hydrolyzed solution, and when the pH=4, the carbon dioxide gas is stopped to generate a neutralized h...

Embodiment 4

[0044] Taking the microcrystalline cellulose extracted from bagasse as raw material to introduce the implementation process of the present invention is as follows:

[0045] Mix the cellulose raw material with the mixed molecular sieve of HZSM-5 and NaY at a mass ratio of 1:25, and react for 8 seconds at 625°C under a nitrogen atmosphere. The gas generated after the reaction and the bromine chloride gas act on the aluminum chloride catalyst Under the reaction, the reaction volume space velocity is 3000h -1 , the reaction temperature is 450°C, the reaction pressure is 0.4Mpa, and the reaction time is 10 seconds. The gas after the reaction is condensed at a temperature of 5°C to generate liquid halogenated aromatic hydrocarbons; in 5mol / L potassium hydroxide solution, 70 Hydrolyze under the condition of ℃, when the pH of the solution is 7.5, the material is discharged to obtain a hydrolyzed solution; carbon dioxide gas is passed into the hydrolyzed solution, and when the pH=4.5, ...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing phenolic substances through catalytic pyrolysis conversion of cellulose, and belongs to the technical field of biomass energy. The method comprises the following steps: mixing the cellulose and a molecular sieve, and performing pyrolysis reaction in an oxygen-free inert atmosphere to generate cellulose pyrolysis steam rich in aromatic hydrocarbon; enabling the steam to run through a metal catalyst-containing catalytic reaction bed layer, enabling a halogenating agent gas to run through the metal catalyst-containing catalytic reaction bed layer from bottom to top, and reacting to generate halogenated aromatic hydrocarbon steam; quickly condensing the halogenated aromatic hydrocarbon steam, hydrolyzing in an alkaline solution, feeding carbon dioxide gas into hydrolysate for neutralizing, extracting the neutralized hydrolysate by using an organic solvent, and distilling the extracting solution at normal pressure, wherein undistilled residual components are phenolic substances. In the method, the cellulose is used as a raw material and the phenolic substances are prepared through catalytic pyrolysis, so that the cellulose with wide resources is utilized to obtain the phenolic substances with high application values, and the utilization values of the cellulose and cellulosic biomass raw materials are increased.

Description

technical field [0001] The invention relates to a method for preparing phenolic substances through catalyzed pyrolysis conversion of cellulose, belonging to the technical field of biomass energy. Background technique [0002] Phenolic substances are widely used in agriculture, chemical industry, medicine, food and other industries, and can be used to prepare insecticides, tanning agents, dyes, disinfectants, biomedicine, food flavorings, growth hormones, phenolic resins, etc. A class of organic compounds with application value. Phenolic substances were originally mainly extracted from plants. In the twentieth century, the rapid development of the chemical industry based on fossil resources made it the main way to obtain phenols from petroleum. However, with the shortage of fossil resources and the gradual emergence of environmental degradation, people have refocused their attention on the use of biomass to produce phenols. [0003] The bio-oil obtained by biomass pyrolysi...

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 Applications(China)
IPC IPC(8): C07C37/02C07C37/52
CPCC07C37/004C07C37/02C07C39/02Y02P20/141
Inventor 常建民刘文亮任学勇李露霏耿晶司慧
Owner BEIJING FORESTRY UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com