Invention Grant
- Patent Title: Process for the preparation of glycols
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Application No.: US16466826Application Date: 2017-12-04
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Publication No.: US10647647B2Publication Date: 2020-05-12
- Inventor: Evert Van Der Heide , Pieter Huizenga
- 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: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2f6e6aa8
- International Application: PCT/EP2017/081349 WO 20171204
- International Announcement: WO2018/104216 WO 20180614
- Main IPC: C07C29/132
- IPC: C07C29/132 ; C07C29/60 ; B01J19/00 ; B01J23/30 ; B01J23/755 ; C07C31/20 ; C07C31/26 ; B01J23/745 ; B01J23/75

Abstract:
The invention provides a process for the preparation of ethylene glycol and 1,2-propylene glycol from starting material comprising one or more saccharide, wherein the process comprises the steps of: i) providing the starting material and hydrogen to a first reactor and reacting said starting material and hydrogen therein in the presence of a solvent and a first catalyst system comprising a retro-aldol catalyst composition and a hydrogenation catalyst composition; ii) continuously removing a first reactor product stream from the first reactor, said first reactor product stream comprising ethylene glycol, 1,2-propylene glycol and in the range of from 2 to 40 wt % of sugar alcohols; iii) contacting said first reactor product stream in a second reactor in the presence of hydrogen with a second catalyst system comprising at least a hydrogenation catalyst composition; and iv) converting a portion of the sugar alcohols in the second reactor into ethylene glycol and/or 1,2-propylene glycol to provide a second reactor product stream comprising ethylene glycol, 1,2-propylene glycol and in the range of from 10 to 80% of the amount of sugar alcohols present in the first reactor product stream.
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