Method for dilute acid pretreatment of plant straws by microwave-cyclic compression percolation

A plant straw and pretreatment technology, applied in food science, biofuel, sugar production, etc., to achieve the effect of improving conversion rate, reducing follow-up process, and reducing concentration

CN103060481BActive Publication Date: 2014-12-10CHINA PETROLEUM & CHEM CORP +1

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: CHINA PETROLEUM & CHEM CORP
Publication Date: 2014-12-10

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Abstract

The invention discloses a method for dilute acid pretreatment of plant straws by microwave-cyclic compression percolation. The method comprises: first conducting standing infiltration on straw particles with a dilute acid solution, then loading the straw particles into a cylindrical reactor, performing fed-batch of the dilute acid solution to the reactor, and at the same time, applying the action of microwave and compressing the straw particles, and discharging the liquid in the reactor; after solid-liquid separation, re-injecting the acid solution and dispersing the straw particles uniformly; carrying out fed-batch of the filtrate obtained from the separation to the reactor, and at the same time, applying the action of microwave and compressing the straw particles, and discharging the liquid in the reactor; and repeating the operations till the end of the reaction. By infiltrating the straw particles in the acid solution in advance and adopting a filtrate cyclic compression mode, the method provided in the invention reduces the concentration and dosage of the acid solution, increases the reaction product concentration, and enhances the reaction speed simultaneously.

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Description

technical field

[0001] The invention belongs to the field of biochemical industry, and particularly relates to a method for pretreating plant stalks by microwave-circulation compression percolation dilute acid, which is mainly used for pretreatment of various plant stalks such as corn stalks, wheat stalks and sweet sorghum stalks. Background technique

[0002] Untreated straw is difficult to be hydrolyzed by microorganisms and enzymes, mainly because of the complex structure of lignocellulose that constitutes the cell wall of straw. Lignocellulose mainly includes cellulose, hemicellulose and lignin. The cellulose molecules are arranged regularly and aggregated into bundles. The fibril framework is filled with hemicellulose and lignin, and there are hydrogen bonds and chemical bonds between them. etc., making its structure very tight. Therefore, the key to efficient utilization of straw components is to separate cellulose from hemicellulose and lignin through pretreatment of...

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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