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Cellulose wet grinding production method

A production method, cellulose technology, applied in the direction of coating, etc., can solve the problems of increasing production costs, polluting the environment, and excessive dust, and achieve the effects of reducing production and processing costs, low energy consumption, and fast drying speed

Inactive Publication Date: 2013-09-25
ZHICHENG CELLULOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production process has the following serious defects: in the pulverization process step, the dried cellulose is pulverized, so there is a lot of dust in the pulverization process, which pollutes the environment; in addition, the energy consumption required for the pulverization of dried cellulose is high, which increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of cellulose wet crushing production method, its specific steps are as follows:

[0022] (1) Alkalinization: Add the isopropanol solution into the reaction kettle, and put in alkali tablets, then add the cellulose material into the reaction kettle, vacuumize, and alkalize for 0.5 to 1.5 hours;

[0023] (2) Etherification: After the alkalization reaction is completed, add ethylene oxide into the reactor with nitrogen as a carrier, etherify at room temperature (20-25°C) for a period of time, then uniformly heat up to 70°C, and etherify at a constant temperature for 2 After ~2.5 hours, uniformly cool down to 30~40°C;

[0024] (3) Neutralization: add hydrochloric acid or acetic acid to the material after etherification and cooling, control the pH value of the material to 5-7, and neutralize for 20-30 minutes;

[0025] (4) Wet crushing: Pour the above-mentioned wet cellulose material after neutralization reaction directly into the grinder for wet crushing;

[0026] ...

Embodiment 2

[0029] A kind of cellulose wet crushing production method, its specific steps are as follows:

[0030] (1) Alkalinization: Add the isopropanol solution into the reaction kettle, and put in alkali tablets, then add the cellulose material into the reaction kettle, vacuumize, and alkalize for 0.5 to 1.5 hours;

[0031] (2) Etherification: After the alkalization reaction is completed, add ethylene oxide into the reactor with nitrogen as a carrier, etherify at room temperature (20-25°C) for a period of time, then uniformly heat up to 70°C, and etherify at a constant temperature for 2 After ~2.5 hours, uniformly cool down to 30~40°C;

[0032] (3) Neutralization: add hydrochloric acid or acetic acid to the material after etherification and cooling, control the pH value of the material to 5-7, and neutralize for 20-30 minutes;

[0033] (4) Filtration: Pour the above-mentioned wet cellulose material after neutralization into a filter for filtration;

[0034] (5) Wet crushing: Pour th...

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PUM

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Abstract

The invention discloses a cellulose wet grinding production method which mainly comprises the following steps of: directly pouring a wet cellulose material subjected to alkalization, etherification and neutralization reaction in a pulverizer, carrying out wet grinding, and filtering; and drying the wet cellulose material in an airflow dryer, and then packaging after treating. The cellulose wet grinding production method has the beneficial effects that because the cellulose material is ground in a wet state, dust is not generated in a grinding process, and environment protection is facilitated; the cellulose material is ground in the wet state, the energy consumption is low, tests prove that compared with the dry grinding, the wet grinding of the cellulose has the advantages that the electricity consumption is reduced by 125 kilowatt-hour per ton and the steam consumption is reduced by 0.6t, and therefore, the production processing cost of the cellulose can be greatly lowered on the whole.

Description

technical field [0001] The invention relates to the technical field of cellulose production and processing. Background technique [0002] Cellulose is the most widely distributed and most abundant polysaccharide in nature, accounting for more than 50% of the carbon content in the plant kingdom. Hemp, wheat straw, straw, bagasse, etc. are all rich sources of cellulose. Cellulose is an important raw material for papermaking. In addition, products based on cellulose are also widely used in plastics, explosives, electrical and scientific research equipment, etc. The cellulose in food (that is, dietary fiber) also plays an important role in human health. Most of the currently known cellulose production processes are to filter the cellulose first, then dry the filtered wet cellulose through an air dryer, and then enter the pulverizer to pulverize the dried cellulose. The cellulose can be packaged for delivery. This production process has the following serious defects: in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/00B29B9/16C08B11/08
Inventor 周亮
Owner ZHICHENG CELLULOSE