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Method for extracting cellulose from straw by adopting ionic liquid

A technology of rice straw and ionic liquid, which is applied in the field of cellulose extraction, can solve the problems of serious cellulose degradation such as dissolution temperature, achieve far-reaching social significance and economic value, simple equipment and simple process

Active Publication Date: 2013-02-13
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in addition to imidazole-based ionic liquids, a few pyridine-based ionic liquids also have certain solubility properties for cellulose, but pyridine-based ionic liquids are severely degraded to cellulose and have harsh conditions such as high dissolution temperatures, which make current research less

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for extracting cellulose from rice straw by using ionic liquid technology, comprising the following steps:

[0029] 1) The rice straw is crushed by crushing equipment to form 100-mesh rice straw powder;

[0030] 2) Add 20g of rice straw powder and 300ml of ammonia solution with a concentration of 1.2mol / L to the steam explosion reactor;

[0031] 3) Start the steam blasting machine, control the reaction temperature to 160°C, and blast after maintaining the pressure for 10 minutes;

[0032] 4) Take out the blasting waste, filter it with suction, dry it, and seal it for storage to get the rice straw pretreatment product;

[0033] 5) The rice straw pretreatment product was mixed with ionic liquid 1-allyl-3-methylimidazole acetate (AMIMOAc) according to the mass ratio of 1:20, placed in a round-bottomed flask, and mechanically stirred in a water bath at 60°C for 6 hours. get the reactants;

[0034] 6) Centrifuge the above reactant at 12000r / min for 10min, then se...

Embodiment 2

[0039] A method for extracting cellulose from rice straw by using ionic liquid technology, comprising the following steps:

[0040] 1) The rice straw is crushed by crushing equipment to form 100-mesh rice straw powder;

[0041] 2) Add 20g of rice straw powder and 300ml of ammonia solution with a concentration of 3.0mol / L to the steam explosion reactor;

[0042] 3) Start the steam blasting machine, control the reaction temperature to 160°C, and blast after maintaining the pressure for 10 minutes;

[0043] 4) Take out the blasting waste, filter it with suction, dry it, and seal it for storage to get the rice straw pretreatment product;

[0044] 5) The rice straw pretreatment product was mixed with ionic liquid 1-allyl-3-methylimidazole acetate (AMIMOAc) according to the mass ratio of 1:25, placed in a round-bottomed flask, and mechanically stirred in a water bath at 70°C for 5 hours. get the reactants;

[0045] 6) Centrifuge the above reactant at 12000r / min for 10min, then se...

Embodiment 3

[0050] A method for extracting cellulose from rice straw by using ionic liquid technology, comprising the following steps:

[0051]1) The rice straw is crushed by crushing equipment to form 100-mesh rice straw powder;

[0052] 2) Add 20g of rice straw powder and 300ml of ammonia solution with a concentration of 2.0mol / L to the steam explosion reactor;

[0053] 3) Start the steam blasting machine, control the reaction temperature to 160°C, and blast after maintaining the pressure for 10 minutes;

[0054] 4) Take out the blasting waste, filter it with suction, dry it, and seal it for storage to get the rice straw pretreatment product;

[0055] 5) The pretreated product of rice straw and ionic liquid 1-allyl-3-methylimidazole acetate (AMIMOAc) were mixed according to the mass ratio of 1:25, placed in a round-bottomed flask, and mechanically stirred in a water bath at 80°C for 5 hours. get the reactants;

[0056] 6) Centrifuge the above reactant at 12000r / min for 10min, then se...

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Abstract

The invention relates to a method for extracting cellulose from straw by adopting an ionic liquid, which comprises the following steps: firstly, crushing the straw into powder, then performing ammonia water low-voltage blasting processing on the straw, and finally, adopting the ionic liquid 1-allyl-3-methyl imidazole acetate (AMIMOAc) to extract the cellulose. The invention has the advantages that the method adopts the ionic liquid to extract the cellulose from the straw powder through the ammonia water low-voltage blasting processing, functionalizes the ionic liquid to enable the ionic liquid to be an effective solvent of the cellulose, and reuses the ionic liquid, so as to realize direct and quick dissolving of fiber and efficient processing of the straw, improve the utilization efficiency of biomass resources, solve the problems that the straw is difficult to degrade and reuse, and have extremely profound social significance and economic value.

Description

technical field [0001] The invention relates to biomass treatment technology, in particular to a method for extracting cellulose from rice straw by using ionic liquid. Background technique [0002] With the consumption of traditional energy such as coal and oil and the energy crisis facing the world, the development and utilization of sustainable energy has attracted widespread attention. Cellulose is the most widely distributed and abundant biomass polymer in nature. Its structure is glucan formed by the connection of glucose molecules through β-1,4-glucosidic bonds. It usually contains thousands of glucose units and is the main component of plant cell walls. Every year, plants can produce 100 billion tons of cellulose through photosynthesis. At the same time, due to many advantages such as non-polluting, biocompatibility, easy degradability, and wide sources, it is regarded as an inexhaustible and renewable resource. Resources, widely used in textile, light industry, che...

Claims

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Application Information

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IPC IPC(8): D21B1/36
Inventor 刘乐鞠美庭李维尊江洋王雁南候其东刘益良
Owner NANKAI UNIV
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