TH91148B - Industrial processes for the production of high-purity diol - Google Patents

Abstract

The purpose of this invention is to provide equipment and processes specific to the Manufactured from high purity diol, cyclic carbonate and aliphatic mo Nohydric alcohol as a precursor More specifically, it is the objective to make it happen that Specialized industrial equipment and inexpensive industrial production processes. And for example do To get high purity diol so that it can be produced in the amount of not less than 1 ton / hour, which is better then no less than 2 tons / hour, which is better then at least 3 tons / hour with stability For a long time (For example, not less than 1000 hours, preferably not less than 3000 hours, preferably not less than 5000 hours) The above objectives can be obtained by using a continuous multi-stage distillation tower E with Specific structure And remove the liquid component from the side cross section outlet, which is installed At the bottom of the chimney tray with a unique structure installed in Enrichment of a continuous multistage distillation tower E

Claims (1)

1.An industrial process for the manufacture of high-purity diol where diol High purity is produced by using cyclic carbonate and aliphatic monohydric alcohol as precursors. The process consists of steps of (I) continuous feeding of the reactants into continuous multi-stage distillation tower A in which catalyst is present, reaction distillation in tower A, continuous removal of the reaction mixture. Low boiling point AT containing the produced dialkyl carbonate and aliphatic monohydric alcohol from the upper part of the chamber A in the council: