公开(公告)号：US20220388933A1

公开(公告)日：2022-12-08

申请号：US17776268

申请日：2020-12-16

Applicant: SHELL OIL COMPANY

Inventor： Evert VAN DER HEIDE ,  Pieter HUIZENGA ,  Kai FISCHER ,  Carmelo PEREZ GOLF ,  David PINILLA GARCIA

IPC: C07C29/84

Abstract: A process for the production of a high purity first diol from a product stream comprising two or more C2 to C7 diols, said process comprising the steps of: (i) providing the product stream to a first distillation column; (ii) providing an extractant selected from the group of C3 to C6 sugar alcohols and mixtures thereof to the first distillation column; (iii) operating the first distillation column to obtain a first bottoms stream comprising at least a first diol and the extractant; (iv) providing the first bottoms stream to a second distillation column operating to obtain a second top stream comprising the first diol and diols with atmospheric boiling points at least 10° C. higher than the first diol, and (v) providing the second top stream to a third distillation column to obtain a third top stream comprising the first diol; wherein the product stream comprises 0.1 to 10 wt % of diols with atmospheric boiling points at least 10° C. higher than the first diol, calculated upon the total weight of C2 to C7 diols in the product stream.