A kind of organic solvent-aqueous solution improves the method of acid-catalyzed ionic liquid pretreatment effect

An ionic liquid and organic solvent technology, applied in the field of fiber raw material pretreatment and separation, can solve the problems of increasing energy loss, high energy consumption, hindering the efficiency of enzymatic hydrolysis and saccharification, and achieve the effect of improving the effect, improving the efficiency and improving the economic feasibility.
CN107142291BActive Publication Date: 2020-01-10BEIJING FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING FORESTRY UNIVERSITY
Publication Date
2020-01-10

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Abstract

The invention discloses a method for improving the pretreatment effect of acid catalysis ionic liquid with an organic solvent-aqueous solution. The method comprises the following steps: (1) smashing a fiber raw material; (2) adding the raw material into an ionic liquid-acid system for pretreatment and catalysis; (3) regenerating with an organic solvent-aqueous solution in an amount which is 2 to 5 times the volume of the raw material; (4) continually stirring; (5) centrifuging to obtain a coarse regenerated fiber raw material; (6) washing the coarse regenerated fiber raw material with a corresponding organic solvent-aqueous solution by 4 to 6 times, and drying to obtain a regenerated fiber raw material. By adopting the method disclosed by the invention, the structural characteristic of the fiber raw material is changed. The dense cell wall structure of fibers is broken, the prepared regenerated fiber raw material is porous on the surface, is less in sediment, and is lower in lignin content, and the problem of adhesion of a large amount of lignin sediment to the surface of a conventional regenerated fiber raw material and the problem of inhibition of enzymatic saccharification are solved.
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Description

technical field

[0001] The invention belongs to the technical field of pretreatment and separation of fiber raw materials, and in particular relates to a method for improving the pretreatment effect of an acid-catalyzed ionic liquid with an organic solvent-water solution. Background technique

[0002] Using lignocellulosic raw materials to develop clean energy to replace traditional fossil energy is an effective way to alleviate energy and environmental crises. Lignocellulosic raw materials are mainly composed of cellulose, lignin and hemicellulose. Among them, cellulose is the most abundant renewable organic resource on the earth, and using it to develop biofuels such as bioethanol to replace fossil fuels has broad application prospects. Effective pretreatment can break the natural anti-degradation barrier of biomass, thereby improving the enzymatic hydrolysis and saccharification efficiency of lignocellulosic raw materials.

[0003] In recent years, acidic ionic liquid p...

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
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