Hydroxypropyl methylcellulose ((HPMC), raw cellulose, can be refined cotton or wood pulp, it is very necessary to crush it before alkalization or during alkalization, and the crushing is through mechanical energy Destroy the aggregate structure of cellulose raw materials to reduce the degree of crystallinity and polymerization, increase its surface area, thereby improving the accessibility and chemical reaction ability of the reaction reagent to the three hydroxyl groups on the glucose ring group of the cellulose macromolecule.

Hydroxypropyl methylcellulose (HPMC) is used as the raw material substrate to produce oil, which can realize the utilization of total sugar, improve the utilization rate of raw materials, reduce the residual amount of substrate in the fermentation broth, and reduce the cost of wastewater treatment. This hydroxypropyl methylcellulose The characteristics of methylcellulose are conducive to the optimization of batch, fed-batch and continuous fermentation processes, avoiding a series of problems such as controlling the composition of the medium and dilution rate; it is also conducive to the regulation of the fermentation process. Since the performance of hydroxypropyl methylcellulose (HPMC) is similar to other water-soluble ethers, it can be used in latex paint and water-soluble resin paint components as a film-forming agent, thickener, emulsifier and stabilizer, etc. The film has good wear resistance, leveling and adhesion, and has improved surface tension, stability to acid and alkali, and compatibility to metallic pigments.

Hydroxypropyl methylcellulose (HPMC) has a good effect as a thickener for white water-based polyvinyl acetate paint. The degree of substitution of cellulose ether is increased, and the resistance to bacterial erosion is also enhanced.

Although the etherification synthesis principle of hydroxypropyl methyl cellulose (HPMC) is not complicated, it needs to be alkalized, raw material pulverized, and alkalized. Each environment of etherification, solvent recovery, centrifugation, washing and drying involves a large number of key technologies and rich knowledge.

For different types of products, each environment has the latest control conditions, such as temperature, time, pressure and material flow control. Auxiliary equipment and control instruments are favorable guarantees for stable product quality and reliable production systems.