Polysubstituted radical cellulose composite ether and its preparing method

A technology of base cellulose and compound ether, which is applied in the field of multi-substituted cellulose compound ether and its preparation, can solve the problems of poor solution stability, high gel temperature of cellulose compound ether, low water retention performance, etc. The effect of low production cost and low production cost

Active Publication Date: 2007-11-14
HUZHOU ZHANWANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology uses specific chemistry between certain types of sugars called sugar alcohols (or glucans) instead of all four chemical moieties found within each type of sugar group itself. These modifications make up less expensive than traditional methods that use these compounds alone or require multiple steps like mixing them together before being able to form an effective solution. Overall this results in lower costs compared to existing solutions made from more complex materials such as polyvinyl chloride resin powders.

Problems solved by technology

This patented describes different methods for producing specific types of polymer called MHC) that can help create new forms of energy sources like batteries and fuel cells.

Method used

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  • Polysubstituted radical cellulose composite ether and its preparing method
  • Polysubstituted radical cellulose composite ether and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Add a certain combination of mixed solvent containing 520KG alkali into a 10 cubic meter stainless steel reactor, stir and cool down to 10-30°C, keep stirring.

[0032] 2. Cool down to below room temperature, add 500KG of refined cotton, vacuumize for 20-30 minutes, keep the temperature and stir for 1-3 hours.

[0033] 3. Add propylene oxide, ethylene oxide and methyl chloride, heat up to 50-70°C, react for 1-2 hours, react at 70-85°C for 1-2 hours, and react at above 85°C for 1-1.5 hours. Observe the reading of the pressure gauge, keep the pressure at 0.3-0.5 MPa for 1 hour, and raise the temperature to maintain the pressure when necessary.

[0034] 4. Start to recover the solvent, and at the same time add hot water above 85°C (a total of 6000kg), and recover until the temperature in the kettle reaches above 95°C and maintain it for 30 minutes.

[0035] 5. Cool to 60-80°C, then add hydrochloric acid to adjust the pH to 4.0-8.0, stir for 20-40 minutes, centrifuge an...

Embodiment 2

[0045] 1. Add 200KG of refined cotton to a 2.5 cubic meter stainless steel reactor, add 650KG of dimethyl ether after vacuuming, stir and cool down to 10-30°C.

[0046] 2. Spray 160KG of 50% sodium hydroxide solution, and keep stirring at 10-15°C for 1-3 hours.

[0047] 3. Add 120 KG of methyl chloride, 100 KG of propylene oxide, and 80 KG of ethylene oxide, raise the temperature to 30-60 °C for 1-3 hours, and react at 60-85 °C for 1-3 hours.

[0048] 4. Start to recover the solvent, and then add hot water above 85°C (800kg in total) and mix for 30 minutes.

[0049] 5. Cool to 60-80°C, then add hydrochloric acid to adjust the pH to 4.0-8.0, stir for 20-40 minutes, centrifuge and dry.

[0050]6. After crushing, the hydroxyethyl content is 2.1%, the representative methoxy content is 18.6%, and the hydroxypropyl content is 7.2%.

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Abstract

This invention relates to a polysubstituent group cellulose compound aether and preparation method. According to weight, he substituent group include methoxyl group 12 to 28%, hydroxyl propoxy 0.5 to 15% and hydroxyethyl 0.2 to 15%. This invention uses three kinds chemical substituent group to substitute cellulose molecule hydroxyl,by controlling the content of three group, make the ethylol hydroxypropyl methylcellulose cost low, gel temperature high, water retention good and property stable. It can completely substitute currently applied cellulose compound aether. The invention also discloses the preparation method of above polysubstitutent group cellulose compound ester.

Description

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Claims

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Application Information

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Owner HUZHOU ZHANWANG PHARMA
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