| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: this invention relates to continuous production of polyether with high molecular weight by etherification of dicarboxylic acids and/or trans-etherification of dicarboxylic acid ethers by divalent alcohols and/or their mixes in the presence of catalysts with formation of prepolymer in tower reactor and polycondensation of said prepolymer for production of polyether with high molecular weight in polycondensation reactor wherein prepolymer with 40 to 70 repeated links are produced in tower reactor, while polycondensation of said prepolymer is carried out in sole extra reactor, thus producing ether with 150 to 205 repeated links. ^ EFFECT: possibility to discharge melt from reactor in several seconds after gas release, to reduce concentration of residual gases and to convert it to above 110 ppm. ^ 40 cl, 7 dwg |
