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Preparation method of instant cellulose ether

A cellulose ether, instant technology, applied in the field of preparation and application of instant cellulose ether, can solve the problems of easy clumping and dispersion effect, cellulose ether is not easy to dissolve, etc., and achieve the effect of fast dispersion and fast dissolution

Inactive Publication Date: 2017-07-28
SHANDONG YITENG NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the existing cellulose ether is not easy to dissolve, easy to cluster and have poor dispersion effect, and to provide a preparation method of instant cellulose ether

Method used

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  • Preparation method of instant cellulose ether
  • Preparation method of instant cellulose ether

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Embodiment Construction

[0010] The technical scheme of the present invention will be further described below in conjunction with detailed processes.

[0011] Pump the reaction solvent medium (toluene 87%, isopropanol 13%) into the reaction kettle, put sodium hydroxide into the kettle, heat up to 70°C, dissolve the alkali, then cool down to 25-30°C, and put Refined cotton powder is alkalized for 2 hours at 25-30°C to produce sodium cellulose. After the alkalization is completed, add etherifying agents such as propylene oxide and methyl chloride, and react at a constant temperature of 25-30°C for 30 Minutes to make the etherification agent fully stir evenly, then raise the temperature to 54±1°C, react at constant temperature for 1 hour, then immediately raise the temperature to 80°C, react at constant temperature for 2 hours, the reaction is completed, cool down to 50°C and add a certain amount of acetic acid to neutralize and adjust The pH value is between 5-7, and then the material is pressed into th...

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Abstract

The invention relates to a preparation method of instant cellulose ether. The preparation method includes: pressing a hydroxypropyl methyl cellulose ether material into a recycling kettle; using soft water higher than 95 DEG C to replace and recycle a solvent; after recycling is completed, separating the material from the soft water through a centrifugal machine; enabling the material to enter a shaft-less screw conveyor, spraying 5-hydroxy-1, 3-phthalaldehyde prepared according to a proportion of 1:7 to the material in the screw conveyor through a spray gun to achieve the objective of crosslinking through stirring of the shaft-less screw conveyor; conveying the material by the shaft-less screw conveyor to a flashing dryer for drying to obtain a final produce, instant hydroxypropyl methyl cellulose ether. Compared with cellulose ether prepared by conventional processes, the instant cellulose ether prepared by the method has the advantage that working efficiency can be improved obviously in the aspect of actual dissolution time.

Description

technical field [0001] The invention belongs to the field of fine chemical industry of polymer materials, and in particular relates to the preparation and application of instant cellulose ether. Background technique [0002] With the development of my country's national economy, instant cellulose ethers are used more and more widely, and the annual demand continues to increase. It can be used as emulsifier, thickener, dispersant, stabilizer, sizing agent, film-forming agent, water-retaining agent, etc. It is used in petroleum, textile, daily chemical, cigarette, papermaking, construction, food, medicine and other industrial fields. [0003] The traditional cellulose ether production process is: alkalinize cellulose refined cotton with sodium hydroxide under certain conditions to form cellulose sodium, and then etherify it with propylene oxide, ethylene oxide, or methyl chloride under certain conditions. The following reaction generates cellulose ether, and then neutralizes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/08
CPCC08B11/08
Inventor 张双剑滕鲲李盼盼
Owner SHANDONG YITENG NEW MATERIAL CO LTD
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