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Extraction method of high-activity biomass lignin

An extraction method and technology for lignin, applied in the field of lignin, can solve problems such as low extraction cost, and achieve the effects of wide distribution, complete structure and large amount of resources

Inactive Publication Date: 2017-02-01
ANHUI GEYI CYCLIC ECONOMY IND PARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for extracting high-activity biomass lignin. On the one hand, it solves the problem of not extracting lignin from waste and utilizing it efficiently. The waste liquid produced by the paper industry is directly discharged into the river or concentrated and burned to cause pollution to the environment. It has the characteristics of low extraction cost, high economic value of the product, and efficient comprehensive utilization of agricultural and forestry waste.

Method used

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  • Extraction method of high-activity biomass lignin

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Comparison scheme
Effect test

Embodiment 1

[0039] The extraction method of high activity biomass lignin comprises the following steps:

[0040] (1) primary separation

[0041] The wheat straw is cut and dedusted by a pulverizer. The length of the straw is 3-5cm, and it is sent to the steam explosion separator through a conveyor belt. It is continuously cooked in an environment of 3.0-4.0MPa for 3-5min, and then cleaned and separated from solid and liquid. The low-concentration sugar liquid and the relatively pure wheat solids from which most of the hemicellulose liquid and various plant polysaccharides have been removed are respectively obtained; among them, the low-concentration sugar liquid is sent to the anaerobic Biogas products are produced in the fermentation system, and the generated sludge is used to produce organic fertilizer products;

[0042] (2) Secondary separation

[0043]Cook and separate the wheat solids, add lye that accounts for 6wt% of the wheat solids at the same time, cook continuously at 110°C f...

Embodiment 2

[0054] The extraction method of high activity biomass lignin comprises the following steps:

[0055] (1) Add the lignin black liquor produced in the pulping process of the paper mill to the sedimentation tank through the pipeline, and add 50ppm of Ca(OH) 2 Carry out flocculation and sedimentation to obtain the lignin supernatant, and then press the lignin supernatant with a plate and frame filter press to remove lignin black liquor impurities and cellulose, and then filter through a filter with a filtration accuracy of 20 μm , to obtain lignin serum;

[0056] (2) Membrane concentration

[0057] The lignin clear liquid is sent to the tubular ultrafiltration membrane, and the pressure of the ultrafiltration membrane stack is controlled by DCS to be 5.0-8.0MPa, the temperature is 40°C, and the flux is 70m 3 , to obtain ultrafiltration concentrated liquid and ultrafiltrated liquid, the ultrafiltrated liquid is filtered and separated through the roll-type nanofiltration membrane,...

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Abstract

The invention relates to an extraction method of high-activity biomass lignin and belongs to the technical field of biomass lignin. The extraction method includes the steps that lignin black liquor obtained after straw is pretreated or lignin black liquor generated by a paper mill serves as raw materials, the lignin black liquor is subjected to flocculation and sedimentation and filtration with a filter, lignin clear liquor is obtained, the lignin clear liquor is subjected to ultrafiltration membrane concentration, nanofiltration membrane concentration and single-effect evaporation, ultrafiltration thick black liquor and nanofiltration thick black liquor are obtained, and the high-activity biomass lignin is obtained after spray drying. According to the extraction method, the adopted straw raw materials are forestry and agricultural residues, the resource quantity of the raw materials is large, the distribution range is wide, cost is low, forestry and agricultural residue resources are efficiently and comprehensively utilized, the resource output rate is high, biomass briquetting fuel, organic fertilizer and other series products can be by-produced, and environmental protection benefits are remarkable.

Description

technical field [0001] The invention relates to a method for extracting high-activity biomass lignin, which belongs to the technical field of lignin. Background technique [0002] As a natural renewable organic polymer, lignin has good dispersibility, flame retardancy, solvent resistance, and thermal stability, and is widely found in woody plants, herbaceous plants, and vascular plants. Together with hemicellulose, it constitutes the skeleton structure of plants, and is the second largest renewable resource of natural polymer materials in nature after cellulose. Lignin has a wide range of uses. It can be used as a rubber reinforcing agent and an adsorbent for metal ions in industry. It can be used as fertilizer, pesticide slow-release agent, soil improver, plant growth regulator and feed additive in agriculture. In the pharmaceutical industry, it can be used to make vanillin, etc. Highly active biomass lignin is a natural polymer substance with a phenolic structure, also k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C02F9/10C02F103/28
CPCC08H6/00C02F1/001C02F1/04C02F1/12C02F1/442C02F1/444C02F1/5236C02F1/66C02F9/00C02F2103/28
Inventor 邹海平刘志刚俞京周婉莹宗武
Owner ANHUI GEYI CYCLIC ECONOMY IND PARK
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