Patent · US Active

Method for separating materials by means of an extractive distillation process

US10793494B2 · kind B2 · utility

1Cited by

2References

12Claims

0Family size

Assignee

BASF SE

Inventor

Norbert Asprion · Ludwigshafen, DE

Key dates

Filing date	Feb 2, 2017
Grant date	Oct 6, 2020
Priority date	—
Expiry date	Feb 9, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C11/16
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for separating a mixture of materials A and B by extractive distillation, using an extraction medium having a higher affinity to B than to A, collecting a liquid fraction on a collecting tray and heated and partially evaporated in a first indirect heat exchanger, collecting the resultant vapor is released into the column and a non-evaporated proportion of the liquid fraction in the sump of the column, and a series of heating, separation and cooling where partially cooled extraction medium fraction is used as heating medium for a heat exchanger.

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