| abstract |
In the known modern processes for the production of cellulose ethers with one or more types of substituents (such as MC, CMC, HEC, HPC, MHEC or EHEC), cellulose can be used in the presence of water, bases and a mixture of as inert organic solvents as possible (as dispersing agents) be implemented with etherification agents. In the organic solvent mixture for these syntheses, dimethoxyethane (ethylene glycol dimethyl ether) and at least one organic solvent from the group of alkanols, alkanediols and alkoxyalkanols (for example methanol and / or isopropanol) are used in particular in amounts of 1 to 30 parts by weight per part by weight of cellulose . |