Deep purification method of crude cellulose

A purification method and cellulose technology, which is applied in the field of deep purification of crude cellulose, can solve the problems of cellulose denaturation, affecting the application performance of cellulose and fibril structure, etc., and achieve the improvement of α-cellulose content, easy control, The effect of short process flow

Inactive Publication Date: 2015-05-20
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the removal methods of lignin and hemicellulose mainly include chlorination, acid treatment, and alkali treatment. These methods not only require high temperature conditions, but also cause cellulose to degrade, oxidize, and denature, thereby affecting fiber The application performance and fibril structure of the element

Method used

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  • Deep purification method of crude cellulose

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Effect test

Embodiment 1

[0047] A kind of crude cellulose advanced purification method of the present embodiment, comprises the following steps:

[0048] (1) Mixing crude cellulose:

[0049] mixing different batches of crude cellulose extracted from wheat straw;

[0050] (2) Purification treatment:

[0051] Adjust the bath ratio to 1:15, adjust the pH value to 6.5 with a buffer solution composed of sodium acetate and acetic acid, then put in 6g / L of biological enzyme, and treat it at 55°C for 80min under the action of ultrasonic waves, the ultrasonic frequency is 53kHz, and the power is 120W.

[0052] The biological enzyme is configured by component A and component B at a mass ratio of 1:3, the component A is lignin peroxidase and laccase, and the mass ratio of lignin peroxidase to laccase 1:2, component B is xylanase.

[0053] (3) Biological enzyme inactivation:

[0054] Raise the temperature of the cellulose purification treatment bath to 80°C for 20 minutes.

[0055] (4) Washing, dehydration ...

Embodiment 2

[0057] A kind of crude cellulose advanced purification method of the present embodiment, comprises the following steps:

[0058] (1) Mixing crude cellulose:

[0059] mixing different batches of crude cellulose extracted from rice straw;

[0060] (2) Purification treatment:

[0061] Adjust the bath ratio to 1:15, adjust the pH value to 6.5 with a buffer solution composed of sodium acetate and acetic acid, then put in 4g / L of biological enzyme, and treat it at 55°C for 60min under the action of ultrasonic waves, the ultrasonic frequency is 53kHz, and the power is 100W.

[0062] The biological enzyme is composed of component A and component B in a mass ratio of 1:2, the component A is lignin peroxidase, manganese peroxidase and laccase, lignin peroxidase The mass ratio of manganese peroxidase and laccase is 1:1:2, and component B is xylanase.

[0063] (3) Biological enzyme inactivation:

[0064] Raise the temperature of the cellulose purification treatment bath to 80°C for 15 ...

Embodiment 3

[0067] A kind of crude cellulose advanced purification method of the present embodiment, comprises the following steps:

[0068] (1) Mixing crude cellulose:

[0069] Blending different batches of crude cellulose extracted from jute fibers;

[0070] (2) Purification treatment:

[0071] Adjust the bath ratio to 1:10, adjust the pH value to 6.5 with a buffer solution composed of sodium acetate and acetic acid, then put in 3g / L of biological enzyme, and treat it at 60°C for 60min under the action of ultrasonic waves, the ultrasonic frequency is 53kHz, and the power is 120W.

[0072] The biological enzyme is composed of component A and component B in a mass ratio of 1:2, the component A is lignin peroxidase and laccase, and the mass ratio of lignin peroxidase to laccase 1:1, component B is xylanase.

[0073] (3) Biological enzyme inactivation:

[0074] Raise the temperature of the cellulose purification treatment bath to 80°C for 15 minutes.

[0075] (4) Wash at room temperat...

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Abstract

The invention discloses a deep purification method of crude cellulose. The method is characterized by comprising the following steps: mixing crude cellulose; carrying out purifying treatment; inactivating biological enzyme; washing; dewatering; and baking. The technology disclosed by the invention is simple, mild in treatment condition, low in time and energy consumption, and free of a chemical assistant, and is capable of effectively improving alpha-cellulose content in a cellulose preparation material; and the structure and the performance of the cellulose are not affected.

Description

Technical field: [0001] The invention relates to a method for purifying cellulose, in particular to a method for deep purification of crude cellulose. Background technique: [0002] Cellulose is the most abundant natural polymer material in nature, and has been widely used in pulp and paper, recycled textile fibers, cellulose derivatives, food, medicine and other industrial fields. In recent years, with the increasing scarcity of petrochemical resources and the growing global energy crisis, renewable biomass resources have become a research hotspot for many scholars. Cellulose has become an important biomass for clean energy research due to its rich resources and non-toxicity. can one. [0003] In nature, cellulose is mainly combined with lignin, hemicellulose, pectin, wax and other substances in the cell wall of woody plants through physical and chemical methods, in which lignin and hemicellulose are relatively high, and These are the two most difficult non-cellulose su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00
CPCD21C5/005
Inventor 王维明钱红飞虞波
Owner SHAOXING UNIVERSITY
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