Preparation method of sodium carboxymethyl cellulose for electronic components

A technology of sodium carboxymethyl cellulose and electronic components, which is applied in the field of chemical preparation and can solve the problems of low transparency and high production costs

Pending Publication Date: 2021-06-08
恒达亲水胶体泰州有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing CMC preparation process, problems such as low transparency and high production cost often occur, so it is necessary to develop a new preparation method to improve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: 1200kg wood pulp is cut into the chip of 0.5 * 0.5 centimeter with pulp slicer, and 1583kg 48% ionic membrane caustic lye, 1750kg 92% ethanol is added in the T-type reactor of 15 cubic meters simultaneously, sprays and adds 600g of borax alcohol solution, the alkalization reaction is controlled at 40 minutes, the temperature is controlled at 30°C, and then 1195 kg of 75% chloroacetic acid 25% alcohol solution is added, and the addition time is controlled for 30 minutes. After the addition, the temperature is raised to 80°C for etherification After reacting for 90 minutes, the material was transferred from the T-type reactor to the neutralization washing bucket and neutralized with 31% hydrochloric acid, and the prepared washing alcohol was added for washing to remove impurities, purified, and then entered the centrifuge for solid-liquid separation, and then controlled the vacuum degree at The alcohol in the reactor is recovered under the condition of -40kPa...

Embodiment 2

[0024] 1200kg of wood pulp is pulverized into floc with a pulverizer, and 1690kg of 48% ionic membrane caustic soda solution and 1750kg of 92% alcohol are added to a 15 cubic T-shaped reactor at the same time, and the alcohol solution of 600g of borax is added by spraying to control the alkalization reaction. In 60 minutes, the temperature was controlled at 30°C, and then 1250 kilograms of 75% chloroacetic acid 25% alcohol solution was added, and the addition time was controlled for 30 minutes. After the addition, the temperature was raised to 80°C, and the etherification reaction was carried out for 90 minutes. Transfer to the neutralization washing bucket and neutralize with 31% hydrochloric acid, add the prepared washing alcohol to wash and remove impurities, purify, enter the centrifuge for solid-liquid separation, and then control the vacuum to recover the alcohol in the reactor under the condition of -40kPa , after recovering the alcohol, transport it to a belt drying roo...

Embodiment 3

[0026] 1200kg of refined cotton is pulverized into flocs with a pulverizer, and 1690kg of 48% ionic membrane caustic soda solution and 1750kg of 92% alcohol are added to a 15 cubic T-shaped reactor at the same time, and the alcoholic solution of 600g of borax is added by spraying, and the alkalization reaction is controlled at 60 minutes, the temperature is controlled at 30°C, and then 1250 kg of 75% chloroacetic acid 25% alcohol solution is added, and the addition time is controlled for 30 minutes. After the addition, the temperature is raised to 80°C, and the etherification reaction is carried out for 90 minutes. The material is transferred from the T-shaped reactor Neutralize with 31% hydrochloric acid in the neutralization washing bucket, add the prepared washing alcohol to wash and remove impurities, purify, enter the centrifuge for solid-liquid separation, and then control the vacuum to recover the alcohol in the reactor under the condition of -40kPa. After the alcohol is...

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PUM

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Abstract

The invention discloses a preparation method of sodium carboxymethyl cellulose for electronic components. The preparation method comprises the following steps: crushing cellulose into small pieces or fluffy flocculent materials; adding the pretreated cellulose into the T-shaped reactor, spraying alcohol and liquid caustic soda at the same time, and spraying and adding a catalyst; after alkalization is finished, adding an etherifying agent chloroacetic acid alcohol solution for etherification reaction; after the etherification reaction is finished, adding an alcohol solution for washing; recovering the alcohol in the reactor under a vacuum condition; and feeding sodium carboxymethyl cellulose into a dryer for drying, and then performing crushing. The process formula combines the characteristics of uniform reaction, sufficient stirring, airtight equipment and the like of a T-shaped reactor, the produced sodium carboxymethyl cellulose special for electronic components has the performance requirements of good water retention, film forming property, high temperature resistance and the like, and can well construct a composite intelligent biosensor.

Description

technical field [0001] The invention belongs to the technical field of chemical preparation, and in particular relates to a preparation method of sodium carboxymethyl cellulose used for electronic components. Background technique [0002] Cellulose ether is a cellulose derivative obtained by chemically modifying natural cellulose. It is one of the most important water-soluble polymers in industry and is currently developing and changing rapidly. Cellulose ether is rich in raw materials, various in variety, and has many unique and excellent properties. It has been widely used in industrial production such as construction, petroleum, food, textile, detergent, paint, medicine, papermaking, and electronic components. It has become the world's Industrial products produced within the scope. Sodium carboxymethyl cellulose, referred to as CMC, as a kind of cellulose ether, its aqueous solution has the functions of thickening, bonding, film forming, protective glue, water retention,...

Claims

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Application Information

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IPC IPC(8): C08B11/12C08B1/08
CPCC08B11/12C08B1/08
Inventor 刘海山周渊超
Owner 恒达亲水胶体泰州有限公司
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