TH90142B - Process for the manufacture of dialkyl carbonates And industrial diol - Google Patents

Abstract

Objectives of this invention When producing dialkyls Carbonates and diols produced Industrial bulk volume (i.e., not less than 2 t / h for dialkyl carbonate and not less than 1.3 t / h for diol) through reactive distillation system of the cyclic use. Click carbonates and aliphatic monohydric alcohols as precursors, continuous feeding of the substrate into the tower Continuous multistage distillation where catalysts are present, and the reaction and distillation by Simultaneously in the distillation tower That were prepared with a specific process that can provide dialkyl Carbonates and anhydrous All of which are produced with high specificity and high efficiency can be stable for a long period of time (i.e. not less than 1000 hrs, better than at least 3000 hrs, will Better than at least 5000 hours) and more than that, it can also provide dialkyl The carbonates that are produced are separated and made Stable purification over a long period of time with high efficiency. It was revealed that by Reactive distillation using continuous multistage A distillation tower A at a unique structure and the top component of the derived AT distillation tower is separated by multi-distillation using the distillation tower. Continuous step B with a unique structure, high purity dialkyl carbonate (i.e. not less than 97%, preferably not less than 99%, which is better than at least 99.9%, yet It would have been better that at least 99.99%) and each diol that could be produced had a high specificity that at least 95%, would be better at not less than 97%, would be better at least. Over 99% on an industrial scale of at least 2 t / h, which would be good at at least 3 t / h, which would be even better at not less than 4 t / h, for dialkyl carbonates. And not less than 1.3 t / h, it is even better at not less than 1.95 t / h, it is even better at not less than 2.6 t / h for diols with stable high yield. A period of not less than 1000 hrs, preferably not less than 3000 hrs, better than 5000 hrs from cyclic carbonates and aliphatic monohydric alcohols.

Claims (1)

1.Process for industrial production that produces dialkyl carbonates and diol Dialkyl carbonate And diols are produced continuously from cyclic carbonates and aliphatic monohydric alcohols that comprise the (I) phase of continuous production of dialkyls. Carbonates and diol through the distillation tower system Reactive form of continuous feeding of cyclic carbonates and acetic monohydric alcohols Go into continuous multistage A distillation tower where the catalyst is present and the reaction is performed. And simultaneous distillation in: