Patent · US Active

Method for separating dimethyl carbonate from methanol

US10815185B2 · kind B2 · utility

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18Claims

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Inventors

Weimin Yang · Shanghai, CN
Jun Li · Nanhu, CN
Wenjun He · Shanghai, CN
Junwei Ge · Shanghai, CN
Jiahua Wang · Beijing, CN
Taikang Fei · Shanghai, CN

Key dates

Filing date	Aug 28, 2018
Grant date	Oct 27, 2020
Priority date	—
Expiry date	Aug 28, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2202/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for separating dimethyl carbonate from methanol includes subjecting a raw material containing dimethyl carbonate and methanol to extractive distillation. The extractant contains an ionic liquid and a compound having a general formula of CH3O(CH2CH2O)nCH3, n being an integer of 2-8. The ionic liquid is an imidazole ionic liquid, a pyridine ionic liquid, or a mixture thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.