Supercharge Your Innovation With Domain-Expert AI Agents!

Method for separating hemicellulose from wood and bamboo raw materials through low-solid-content prehydrolysis

A technology of hemicellulose and prehydrolysis, which is applied in fiber raw materials, fiber raw material treatment, raw material pretreatment, etc., can solve the problems of low hemicellulose removal rate, poor prehydrolysis selectivity, long prehydrolysis time, etc. The effects of short hydrolysis time, improved reaction performance, and low prehydrolysis temperature

Active Publication Date: 2020-12-08
北京福意达科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of long pre-hydrolysis time, high temperature, high energy consumption, low hemicellulose removal rate and poor pre-hydrolysis selectivity when using the pre-hydrolysis kraft method to prepare dissolving pulp in the prior art , firstly, a low-solid prehydrolysis method for separating hemicellulose from wood and bamboo materials is provided

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 separating hemicellulose from wood and bamboo raw materials through low-solid-content prehydrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 pretreatment separates bamboo raw material hemicellulose

[0039] Include the following steps:

[0040] (1) Take 2-year-old punnet bamboo raw materials, and use a Pallmann chipper to chip the bamboo material (the moisture content of the bamboo chips is 61.31%) to obtain bamboo chips with a length of 20-30 mm. After chipping, screen with a double-layer cylindrical bamboo sieve to remove broken bamboo nodes, bamboo chips and uncut bamboo strips. After screening, the bamboo chips are washed with a drum washing machine to remove impurities such as stones, silt and metal mixed in the bamboo chips. After washing, the bamboo slices are dehydrated with an inclined spiral dehydrator to remove the free water brought by the bamboo slices. The dehydrated bamboo chips are sent to the silo by the belt conveyor for use in the pre-hydrolysis section.

[0041] (2) The bamboo slices in the silo are sent to the liquid potter through the belt conveyor, and then loaded into ...

Embodiment 2

[0055] Embodiment 2 pretreatment separates pine raw material hemicellulose

[0056] Include the following steps:

[0057] (1) Take imported radiata pine wood chips and wash the wood chips with a drum washing machine to remove impurities such as stones, silt and metal mixed in the wood chips. After washing, the wood chips are dehydrated with an inclined spiral dehydrator to remove the free water brought by the wood chips. The dehydrated wood chips are sent to the silo by the belt conveyor for use in the pre-hydrolysis section.

[0058] (2) The wood chips in the silo are sent to the liquid potting device through the belt conveyor, and then loaded into the cooking vertical pot through the liquid potting device.

[0059] (3) After the cooking vertical pot is filled with wood chips, close the self-pressing automatic pot cover tightly, and start to pass in clean water. The amount of clean water is 0.15 tons / ton of dry wood chips; the liquid ratio is 1:3.6. After adding the clear...

Embodiment 3

[0072] Embodiment 3 pretreatment separates blue eucalyptus wood raw material hemicellulose

[0073] Include the following steps:

[0074] (1) Take imported blue eucalyptus wood chips and wash the wood chips with a drum washing machine to remove impurities such as stones, silt and metal mixed in the wood chips. After washing, the wood chips are dehydrated with an inclined spiral dehydrator to remove the free water brought by the wood chips. The dehydrated wood chips are sent to the silo by the belt conveyor for use in the pre-hydrolysis section.

[0075] (2) The wood chips in the silo are sent to the liquid potting device through the belt conveyor, and then loaded into the cooking vertical pot through the liquid potting device.

[0076] (3) After the cooking vertical pot is filled with wood chips, close the self-pressing automatic pot cover tightly, and start to pass in clean water. The amount of clean water is 0.16 tons / ton dry wood chips; the liquid ratio is 1:4.0. After ...

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
sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of hemicellulose treatment, and discloses a method for removing hemicellulose from wood and bamboo raw materials by adopting low-solid prehydrolysis separation. The method comprises the following steps: extracting a pre-hydrolysate in a pre-hydrolysis process, and simultaneously adding an equal amount of water with the same temperature for replacement with the pre-hydrolysate so as to reduce the concentration of a hemicellulose degradation product in the pre-hydrolysate and realize low-solid pre-hydrolysis. Compared with a traditional wood and bamboo water pre-hydrolysis method, the method has the advantages of short pre-hydrolysis time, low pre-hydrolysis temperature, low pre-hydrolysis energy consumption, good pre-hydrolysis selectivity, highhemicellulose removal rate and the like. The method for separating the hemicellulose from the wood and bamboo raw materials through low-solid pre-hydrolysis can be directly used for industrial production, and is beneficial to reducing the production energy consumption of dissolving pulp, improving the quality of the dissolving pulp and improving the production efficiency of the dissolving pulp.

Description

technical field [0001] The invention relates to the technical field of hemicellulose treatment, in particular to a low-solid prehydrolysis method for separating wood and bamboo raw material hemicellulose. Background technique [0002] Due to the wide application of dissolving pulp products in industries such as textiles, construction, tobacco, military industry, medical treatment, food and water treatment, the global production of dissolving pulp has increased year by year, reaching 10.1 million tons in 2018, and the production capacity is mainly concentrated in China, the United States and Europe. Major dissolving pulp production bases in the world. The apparent production capacity of dissolving pulp in my country in 2019 will reach 2.6 million tons (Shiyan Paper, Qingshan Paper and Anhui Huatai each have 100,000 tons, Juntai Paper has 300,000 tons, Hubei Chenming has 300,000 tons, and Sun Paper has 500,000 tons. , Asia-Pacific Senbo 1.2 million tons), accounting for 25% 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 Applications(China)
IPC IPC(8): D21C5/00D21B1/02
CPCD21B1/02D21B1/023D21C5/00
Inventor 马晓娟曹石林黄海陈秋艳
Owner 北京福意达科技有限公司
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