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Lignin separation system and method thereof

A separation system and technology for lignin, applied in separation methods, filtration separation, chemical instruments and methods, etc., can solve the problems of low production efficiency and high requirements for separation conditions, and achieve simple equipment, easy large-scale industrialization, and low production costs. Effect

Active Publication Date: 2022-02-11
合肥智慧环境研究院 +1
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  • 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 how to solve the problems of high requirements for separation conditions and low production efficiency in the existing lignin separation technology

Method used

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  • Lignin separation system and method thereof
  • Lignin separation system and method thereof

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Embodiment 1

[0035] Such as figure 1 As shown, this embodiment discloses a lignin separation system, including a reaction kettle 1, a solvent tank 2, a lignin separation tank 3, a first filter press 4, a water tank 5, a solvent / water tank 6, a solvent buffer tank 7, An air compressor 8, an air storage tank 9, a second filter press 10, and a high-efficiency evaporator 11.

[0036] Such as figure 1 As shown, the reaction kettle 1 of the present embodiment is provided with a raw material inlet 101, a solid-liquid outlet, a compressed air inlet, a water inlet, a first solvent inlet / outlet, a second solvent inlet, a first solvent outlet / inlet and a second solvent outlet. Two solvent outlets, the raw material inlet 101 are connected with the external conveyor belt.

[0037]Such as figure 1 As shown, the solvent tank 2 of this embodiment includes two tanks, specifically the first solvent tank 201 and the second solvent tank 202, and the first solvent tank 201 and the second solvent tank 202 ar...

Embodiment 2

[0063] The method for separating lignin by a lignin separation system comprises the following steps:

[0064] a. Crush the rice straw to less than 1.5 cm, take 200 kg and pour it into the reaction kettle 1 through the conveyor belt from the raw material inlet 101;

[0065] B, add 800 kilograms of ethylene glycol and 10 kilograms of p-toluenesulfonic acid in the first solvent tank 201, draw into reactor 1 after stirring evenly, and flow to the second solvent tank 202 from reactor 1, reactor 1 simultaneously Heating to 80°C, when the solvent in the first solvent tank 201 is exhausted, the solvent is drawn into the reaction kettle 1 from the second solvent tank 202, and flows to the first solvent tank 201, repeating this many times until the lignin is basically dissolved Finally, stop pumping the solvent so that the solvent completely enters the first solvent tank 201 and the second solvent tank 202;

[0066] c. Add ethylene glycol in the solvent buffer tank 7, and pump it into ...

Embodiment 3

[0072] The difference between this embodiment and the second embodiment is that in step a, the rice stalks are replaced with corn stalks.

[0073] The lignin extraction rate obtained by using the method of this embodiment exceeds 93%, and ethylene glycol, water and remaining p-toluenesulfonic acid are recycled.

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Abstract

The invention discloses a lignin separation system and method. The lignin separation system comprises a reaction kettle, solvent tanks, lignin separation tanks, a first filter press, a water tank and a solvent / water tank. After the biomass raw material in the reaction kettle and the solvent and the acid from one of the solvent tanks are jointly stirred and heated to be decomposed, most lignin is dissolved in the solvent and then sucked into the other solvent tank; after the solvent in the initial solvent tank is completely sucked, the solvent is reversely sucked from the other solvent tank to pass through the reaction kettle to enter the initial solvent tank, and suchsuction is carried out repeatedly and circularlyfor multiple times until the lignin is basically dissolved; then liquid in the two solvent tanks is introduced into the two lignin separation tanks,and meanwhile, water is introduced into the two lignin separation tanks from the water tank, the lignin is separated out and separated from the solvent and enter the first filter press together with the liquid; and the solid which is extruded and separated out is the lignin, and the solvent and water are introduced into the solvent / water tank. The method is simple and feasible in process route, simple in equipment and high in lignin separation efficiency.

Description

technical field [0001] The invention relates to the technical field of utilization of agricultural and forestry biological data, in particular to a lignin separation system and a method thereof. Background technique [0002] The energy and environment crisis is one of the main obstacles to the sustainable development of human society in the 21st century. Making biomass fuels and bio-based products from the most abundant and cheapest renewable biomass feedstock on earth is one of the effective ways to overcome the above barriers. [0003] Biomass is composed of three main components: cellulose, hemicellulose and lignin. Generally, cellulose accounts for 35% to 45%, hemicellulose accounts for 20% to 40%, and lignin accounts for 20% to 30%. Cellulose and hemicellulose can be hydrolyzed and saccharified to produce a series of sugar platform compounds, including liquid fuels such as bioethanol and biobutanol, and chemicals such as furfural and xylitol. Cellulose can also be used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01D36/00C08H7/00
CPCB01J19/18B01D36/00C08H6/00
Inventor 李文志杜志杰安胜欣
Owner 合肥智慧环境研究院
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