HEMC LH 6000

EipponCell® HEMC LH 6000 hydroxyethyl methyl cellulose is a non-ionic cellulose mixed ether made through a chemical process involving cotton, wood alkalized, ethylene oxide, and methyl chloride ether.    Currently, the production process of HEMC can be categorized into two main methods: the liquid phase method and the gas phase method. In the liquid phase method, the equipment used has relatively low internal pressure requirements, making it less risky.    The cellulose is soaked in lye, leading to full swelling and alkalization.    The osmotic swelling of the liquid benefits cellulose, resulting in HEMC products with a relatively uniform degree of substitution and viscosity.    Moreover, the liquid phase method allows for easy product variety substitution.    However, the production capacity of the reactor is limited (typically below 15m3), making it necessary to increase the number of reactors for higher production.    Additionally, the reaction process requires a considerable amount of organic solvent as a carrier, leading to longer reaction times (generally exceeding 10 hours), increased solvent distillation recovery, and higher time costs. On the other hand, the gas-phase method involves compact equipment and offers high single-batch yields.    The reaction takes place in a horizontal autoclave, with a shorter reaction time (usually 5-8 hours) compared to the liquid phase method.    This method does not require a complex solvent recovery system.    After the reaction is completed, the excess methyl chloride and the by-product dimethyl ether are recycled and reused separately through a recovery system.    The gas-phase method boasts lower labor costs and reduced labor intensity, resulting in overall lower production costs compared to the liquid phase method.    However, the gas-phase method requires a significant investment in equipment and automatic control, leading to higher technical content and associated costs.  Where to buy Cas HEMC LH 6000