Invention Application
- Patent Title: PROCESS FOR THE SEPARATION OF GLYCOLS
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Application No.: US17776268Application Date: 2020-12-16
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Publication No.: US20220388933A1Publication Date: 2022-12-08
- Inventor: Evert VAN DER HEIDE , Pieter HUIZENGA , Kai FISCHER , Carmelo PEREZ GOLF , David PINILLA GARCIA
- Applicant: SHELL OIL COMPANY
- Applicant Address: US TX HOUSTON
- Assignee: SHELL OIL COMPANY
- Current Assignee: SHELL OIL COMPANY
- Current Assignee Address: US TX HOUSTON
- Priority: EP19216694.0 20191216
- International Application: PCT/EP2020/086583 WO 20201216
- Main IPC: C07C29/84
- 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.
Public/Granted literature
- US12234204B2 Process for the separation of glycols Public/Granted day:2025-02-25
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