Patent · US Active

Method and device for using reaction heat during the production of 1,2-dichloroethane

US7671243B2 · kind B2 · utility

1Cited by

1References

7Claims

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	Jun 27, 2006
Grant date	Mar 2, 2010
Priority date	—
Expiry date	Jun 27, 2026

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/00006
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for using reaction heat produced by reaction during the production of 1,2-dichloroethane from ethylene and chlorine in a direct chlorination reactor. The chlorine is produced in a sodium chloride electrolysis and the reaction heat, during the formation of 1,2-dichloroethane is used at least partially for the evaporation of NaOH, which is produced during NaCl-electrolysis for producing the required chlorine for direct chlorination, as a coupling product. The invention also relates to a device for carrying out said method, comprising a multi-tube heat exchanger comprising two fixed tubular plates and a NaOH-liquid phase part, and the caustic soda passes through the inside of the tube and 1,2-dichloroethane passes the outside of the tube. The heat exchanger also comprises devices for feeding and distributing the caustic soda in the inside of the tube.

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