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Method for separating semifiber and fiber frame plant stalks

A technology of semi-fiber and straw, which is applied in the field of pretreatment of plant straw in organic chemistry, can solve the problems of excessive energy consumption and high cost, and achieve the effects of saving energy, increasing recycling costs, and improving utilization

Inactive Publication Date: 2007-03-21
ZHONGAOSHENGHUA SCI & TECH DEV TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a dilute liquid makes the distillation recovery of the main product too expensive and consumes too much energy
The second is the stability of five-carbon sugars in xylose and other mixed sugars

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Build a 20m × 20m × 2m large pool in the ground, put 2% dilute sulfuric acid in the pool, pour the corn stalk raw material into the dilute acid pool and soak for 40min at 20°C, the solid-liquid ratio of soaking is 4:1, so that dilute acid Penetrate and evenly distribute in the corn stalk raw material. Use the "drum compressor" commonly used in the sucrose industry to squeeze the corn stalk raw material containing dilute acid to remove most of the acid. The remaining wet solids were approximately 45% dilute acid and 55% solids. The solid is wet, but there is no flowable liquid. The acid-containing raw material solids are heated in a closed large vessel at low temperature with exhaust gases from the boiler room. Keep at 95°C for 8 hours. Put the hemifiber hydrolyzed material in the extraction column. The structure of the extraction column is cylindrical and hollow. The upper and lower bottom surfaces are empty sieve plates. Add warm water at 60°C from above to extract t...

Embodiment 2

[0033] Soak the wheat straw raw material in 10% dilute sulfuric acid with a solid-to-liquid ratio of 6:1, and soak for 15 minutes at 20° C. to make the dilute acid permeate and uniformly distribute on the wheat straw raw material. Use the "drum compressor" commonly used in the sugar industry to squeeze the wheat straw raw material containing dilute acid to remove most of the acid. The remaining wet solids are approximately 40% dilute acid and 60% solids. The solid is wet, but there is no flowable liquid. The acid-containing feedstock solids were heated in a closed large vessel. Keep at 85°C for 10 hours. Put the hemifiber hydrolyzed material into the extraction column, add warm water at 45°C, and extract the contained monosaccharides and polysaccharides by the column-type flow extraction method. Continue to add warm water to the column at the top of the column, continue to reclaim the sugar solution at the bottom of the column, and stop when the sugar concentration in the "...

Embodiment 3

[0035] Build a 25m × 25m × 2m large underground pool, put 6% dilute sulfuric acid in the pool, pour the sawdust raw material into the dilute acid pool at 30°C and soak for 15min, the solid-liquid ratio of soaking is 7:1, so that the dilute acid can penetrate and And evenly distributed in the sawdust raw material. The "drum compressor" commonly used in the sugar industry is used to squeeze the sawdust raw material containing dilute acid to remove most of the acid. The remaining wet solids were approximately 45% dilute acid and 55% solids. The solid is wet, but there is no flowable liquid. The acid-containing sawdust raw material is heated in a closed large container at a low temperature with the exhaust gas from the boiler room. Keep at 90°C for 4 hours. The material that has completed the hydrolysis of the hemifiber is placed in the extraction column, and warm water at 50°C is added from above to extract the mixed sugar solution after the hydrolysis of the hemifiber in the ...

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PUM

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Abstract

The present invention relates to a method for separating hemi-fiber and fiber from plant stalk. Said method includes the following steps: soaking the fibrous material in dilute sulfuric acid, using drum to roll the fibrous material and remove the most of acid liquor, then heating the fibrous material and placing the fibrous material into a closed large container, heat-insulating, after a period of time, adding warm water and utilizing column extractor to make extraction so as to obtain the invented hemi-fibre and fiber.

Description

technical field [0001] The invention relates to a method for separating hemifibers and fibers from plant straws, which belongs to the pretreatment method of plant straws in organic chemistry. Background technique [0002] Plant straw is mainly composed of three types of substances: fiber, semi-fiber and wood glue. For every ton of grain produced, the field also produces about one and one tenth of a ton of plant straw such as wheat straw and corn stalks. my country produces 480,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 tons of plant stalks produced in farmland annually. This is really a large and renewable resource. In addition, in addition to the supply of building materials and paper, forest products also have a large amount of unused fibers such as twigs, bark, leaves, wood chips, waste paper, etc., with a total amount of about 500 million tons per year. my country has a large population, and its natural reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/34
Inventor 赵守宇崔勇慧
Owner ZHONGAOSHENGHUA SCI & TECH DEV TIANJIN
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