Invention Grant
- Patent Title: Process for preparing dialkyl carbonate and alkanediol
-
Application No.: US17642438Application Date: 2020-09-28
-
Publication No.: US12098125B2Publication Date: 2024-09-24
- Inventor: Evert Van Der Heide , Kai Jürgen Fischer
- Applicant: SHELL OIL COMPANY
- Applicant Address: US TX Houston
- Assignee: Shell USA, Inc.
- Current Assignee: Shell USA, Inc.
- Current Assignee Address: US TX Houston
- Agency: Shell USA, Inc.
- Priority: EP 201292 2019.10.03
- International Application: PCT/EP2020/077029 2020.09.28
- International Announcement: WO2021/063853A 2021.04.08
- Date entered country: 2022-03-11
- Main IPC: C07C68/065
- IPC: C07C68/065 ; C07C29/48

Abstract:
The invention relates to a process wherein a dialkyl carbonate stream containing an ether alkanol impurity is subjected to extractive distillation using an extraction solvent to obtain a top stream comprising dialkyl carbonate and a bottom stream comprising the ether alkanol impurity and the extraction solvent, wherein the extraction solvent is an organic compound containing one or more ester moieties and/or ether moieties which organic compound does not contain a hydroxyl group. Further, the invention relates to a process for making a diaryl carbonate, comprising reacting an aryl alcohol with a stream containing a dialkyl carbonate from which stream an ether alkanol impurity has been removed in accordance with the above-described process.
Public/Granted literature
- US20220340513A1 PROCESS FOR PREPARING DIALKYL CARBONATE AND ALKANEDIOL Public/Granted day:2022-10-27
Information query