Patent · US Active

Method of operating a distillation column for purifying 1,2-dichloroethane and for coupled sodium hydroxide solution evaporative concentration

US8742182B2 · kind B2 · utility

1Cited by

2References

3Claims

0Family size

Assignees

UHDE GMBH · DE
Vinnolit GmbH & Co. KG · DE

Inventors

Sven Petersen · Kelkheim, DE
Michael Benje · Darmstadt, DE
Peter Kammerhofer · Altötting, DE

Key dates

Filing date	Sep 7, 2006
Grant date	Jun 3, 2014
Priority date	—
Expiry date	Oct 30, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C17/383
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for operating a distillation column for the removal of water and lower-boiling components than 1,2-dichloroethane from 1,2-dichloroethane in which at least part of the heat from condensation of the aqueous vapors from the distillation column is used to concentrate caustic soda solution by evaporation; furthermore, at least part of the 1,2-dichloroethane formed when chlorine and ethylene react in a direct chlorination unit is used to heat said distillation column and can subsequently also be used as a heat transfer fluid to concentrate caustic soda solution by evaporation.

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