Patent · US Expired

Process for the separation of halogenated hydrocarbons from hydrochloric acid

US4986974A · kind A · utility

0Cited by

6References

13Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Wilhelm Lendle · Bad Soden am Taunus, DE
Wolfgang Scheibitz · Frankfurt am Main, DE
Heribert Tetzlaff · Frankfurt am Main, DE
Bernhard Wojtech · Bad Soden am Taunus, DE

Key dates

Filing date	Aug 29, 1989
Grant date	Jan 22, 1991
Priority date	—
Expiry date	Aug 29, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/909
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process is disclosed for the separation of halogenated hydrocarbons from concentrated hydrochloric acid, which contains 10 to 37% by weight of hydrogen chloride. The hydrochloric acid is freed from the halogenated hydrocarbons in an extraction with paraffins having more than 7 carbon atoms, or with paraffin waxes having dropping points from 70.degree. to 160.degree. C. or with paraffin/paraffin wax mixtures, preferably in a continuous counterflow extraction or cross-flow extraction.

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