Method for preparing microcrystalline cellulose for toothpaste

A technology of microcrystalline cellulose and toothpaste, applied in dentistry, medical science, oral care, etc., can solve the problems of insufficient particle size, insufficient whiteness, and insufficient thickening, and achieve high water absorption and enhanced viscosity Effect

Inactive Publication Date: 2014-06-18
山东光大科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention improves the existing preparation method aiming at the defects of insufficient thickening property, insufficient whiteness and insufficient p

Method used

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  • Method for preparing microcrystalline cellulose for toothpaste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Hydrolysis: Put 2500Kg of drinking water in the reaction kettle, open the industrial hydrochloric acid metering tank, put in 46kg of 30% industrial hydrochloric acid to make the acidity 0.2mol / L, turn on the steam and heat to 60°C, close the steam inlet valve, start stirring, and tear the 150kg of refined cotton (average degree of polymerization is 1600, whiteness greater than 85) and 100kg of wood pulp into small flakes, open the steam valve and raise the temperature to 100°C, and carry out hydrolysis reaction at this temperature for 15 minutes.

[0017] Bleaching: Cool down to 80°C, take 5000ml of 30% hydrogen peroxide solution and add it dropwise into the reaction kettle, stirring while adding. After the dropwise addition was completed, the temperature was raised to 95° C., and the reaction was continued for 10 minutes.

[0018] Press filter washing: open the bottom valve of the reaction kettle, and discharge the material in the storage tank of the filter press post ...

Embodiment 2

[0023] Hydrolysis: Put 2500Kg of drinking water in the reaction kettle, open the industrial hydrochloric acid metering tank, put in 52kg of 30% industrial hydrochloric acid, the acidity of industrial hydrochloric acid is 0.23mol / L, turn on steam and heat to 80°C, close the steam inlet valve, start stirring, Take 150kg of refined cotton (average degree of polymerization 2000, whiteness greater than 85) and 100kg of wood pulp torn into small slices, open the steam valve and raise the temperature to 100°C, and carry out hydrolysis reaction at this temperature for 15 minutes.

[0024] Bleaching: Cool down to 85°C, take 5000ml of 30% hydrogen peroxide solution and add it dropwise into the reaction kettle, stirring while adding. After the dropwise addition, the temperature was raised to 97° C., and the reaction was continued for 10 minutes.

[0025] Press filter washing: open the bottom valve of the reaction kettle, and discharge the material in the storage tank of the filter press ...

Embodiment 3

[0030] Hydrolysis: Put 2500Kg of drinking water in the reaction kettle, open the industrial hydrochloric acid metering tank, put in 48kg of 30% industrial hydrochloric acid, the acidity of industrial hydrochloric acid is 0.21mol / L, turn on steam and heat to 68°C, close the steam inlet valve, start stirring, Take 150kg of refined cotton (average degree of polymerization 1700, whiteness greater than 85) and 100kg of wood pulp torn into small slices, open the steam valve and heat up to 100°C, and carry out hydrolysis reaction at this temperature for 15 minutes.

[0031] Bleaching: Cool down to 82°C, take 5000ml of 30% hydrogen peroxide solution and add it dropwise into the reaction kettle, stirring while adding. After the dropwise addition, the temperature was raised to 96° C., and the reaction was continued for 10 minutes.

[0032] Press filter washing: open the bottom valve of the reaction kettle, and discharge the material in the storage tank of the filter press post for stand...

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Abstract

The invention relates to a method for preparing microcrystalline cellulose, and particularly relates to a method for preparing microcrystalline cellulose for toothpaste. The method comprises the following steps: by taking 150kg of purified cotton or 100kg of wood pulp as a raw material, hydrolyzing by adopting 46-52kg of 0.2-0.23mol/L diluted hydrochloric acid; adding 50,000mL of 30% hydrogen peroxide to bleach in the hydrolysis process; crushing by an ultrafine grinder after drying and primarily crushing, so as to obtain the microcrystalline cellulose. The microcrystalline cellulose prepared by the method is high in hygroscopic property, the viscosity is not greater, so the microcrystalline cellulose can not layer after the microcrystalline cellulose is dissolved into water, the whiteness is greater than 95, the mean grain size is smaller than 5 microns, the smaller the grain size is, the larger the specific surface is, the microcrystalline cellulose can be fully dispersed in the toothpaste, and the viscosity of the toothpaste is enhanced.

Description

technical field [0001] The invention relates to a preparation method of microcrystalline cellulose, in particular to a preparation method of microcrystalline cellulose for toothpaste. Background technique [0002] Toothpaste thickener usually uses sodium carboxymethyl cellulose, but sodium carboxymethyl cellulose uses chemical substances such as solid sodium hydroxide, chloroacetic acid and ethanol during the synthesis process from cotton fibers, and the residues of chemical substances are easy to cause harm to the human body. adverse effects. Therefore, with the improvement of people's consumption concept and the requirements of green environmental protection, the use of natural thickeners without chemical synthesis has become a future development trend. [0003] As pure natural plant cellulose, microcrystalline cellulose is widely used in food and medicine because it is non-toxic and non-irritating, and it is not affected by pH and temperature during use, so it is an ide...

Claims

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Application Information

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IPC IPC(8): C08B15/08C08B15/02A61K8/73A61Q11/00
Inventor 李培芹陈爱猛王公新李大纲郑善致
Owner 山东光大科技发展有限公司
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