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Method for preparing microcrystalline cellulose and reaction equipment of microcrystalline cellulose

A technology of microcrystalline cellulose and production method, which is applied in the direction of pulping with acid salt/acid anhydride, can solve the problems of large amount of water and acid, achieve the effect of less usage, reduce the usage of hydrochloric acid, and reduce pollution

Active Publication Date: 2014-01-22
HUZHOU CITY LINGHU XINWANG CHEM CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problem of large amount of water and acid used in the production of microcrystalline cellulose by traditional acid hydrolysis, a high-shear method is provided. Hydrolysis method and production equipment of plant fiber under shear force

Method used

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  • Method for preparing microcrystalline cellulose and reaction equipment of microcrystalline cellulose
  • Method for preparing microcrystalline cellulose and reaction equipment of microcrystalline cellulose
  • Method for preparing microcrystalline cellulose and reaction equipment of microcrystalline cellulose

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Add 1500kg deionized water into the 2000L enamel reaction kettle, start the stirring paddle, slowly add 12.0kg hydrochloric acid, and make a 0.25% dilute hydrochloric acid solution. Slowly put 500kg of wood pulp into the 4000L new biaxial differential speed high shear force reaction device, turn on the steam heating switch of the spacer, and inject the prepared dilute hydrochloric acid solution at the same time. Wood pulp was swelled and mixed in a new biaxial high-shear reaction device, sheared and depolymerized to prepare a wood pulp mixture with a solid content of 24.8%. Heat up to 90-100°C, keep warm and depolymerize for 3 hours.

[0034] The crude product obtained after heat preservation and continuous depolymerization, the appearance of the cellulose with a solid content of 1% was observed under a microscope, similar to that of cellulose produced by traditional acid hydrolysis.

[0035] Stop heating after the depolymerization is completed, stir to obtain a slurry...

Embodiment 2

[0040] Add 1500kg deionized water into the 2000L enamel reaction kettle, start the stirring paddle, slowly add 13.5kg hydrochloric acid, and make a 0.28% dilute hydrochloric acid solution. Slowly put 500kg of refined cotton into a 4000L new biaxial differential high-shear device, turn on the steam heating switch of the spacer, and inject the prepared dilute hydrochloric acid solution at the same time. Refined cotton was swollen, mixed, sheared and depolymerized in a new biaxial high-shear reaction device to prepare a refined cotton mixture with a solid content of 24.8%. Heat up to 90-100°C and keep warm for 2.5 hours to depolymerize.

[0041] The crude product obtained after heat preservation and continuous depolymerization, the appearance of the cellulose with a solid content of 1% was observed under a microscope, similar to that of cellulose produced by traditional acid hydrolysis.

[0042] Stop heating after the depolymerization is completed, stir to obtain a slurry materi...

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Abstract

The invention discloses a method for preparing microcrystalline cellulose. The method is characterized in that the microcrystalline cellulose is prepared from inorganic acid solution with the mass percentage of 0.1-1 percent and plant fiber, the mass of the inorganic acid solution is 2-3 times that of cellulose, and the raw materials react in a high-shearing-force reaction device at the reaction temperature of 90-100 DEG C. With the adoption of the method of depolymerizing the cellulose by virtue of low acid, the use of inorganic acid is greatly lowered, and the generation of the waste acid water is reduced, so that the environment is protected, the pollution is reduced, the corrosion to equipment and workshops can also be lowered, and the safety action is strengthened.

Description

technical field [0001] The invention relates to a preparation method of microcrystalline cellulose and production equipment thereof. Background technique [0002] Microcrystalline cellulose, also known as MCC or cellulose gel, is widely used as an excipient, binder and disintegrant for pharmaceutical tablets, a suspending agent in liquid pharmaceutical preparations, in food applications (including beverages) Stabilizers and binders, stabilizers, binders and disintegrants and processing aids in cosmetics. MCC is used alone in food or as a fat substitute in co-processing modification. MCC has good prospects for use in medicine and food, and its usage is increasing every year. It is an excellent pharmaceutical excipient and food additive. In pharmaceutical production, it is a very good excipient to improve the dissolution rate of drugs. In the food industry, it is a food additive worthy of praise for improving food taste, reducing food calories and preventing obesity. [000...

Claims

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Application Information

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IPC IPC(8): D21C3/04
Inventor 沈云飞
Owner HUZHOU CITY LINGHU XINWANG CHEM CO LTD
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