公开(公告)号：DE3061238D1

公开(公告)日：1983-01-13

申请号：DE3061238

申请日：1980-02-08

Applicant: HOECHST AG

Inventor： CZEKAY ARNO DR ,  HOLLER ERNST ,  KUXDORF BERNHARD ,  PUSCHE HERBERT ,  NEUSS HANS-WILHELM ,  SCHOLZ HARALD DR

IPC: C07C17/25 ,  C07C21/06 ,  C07C17/34

公开(公告)号：MX147525A

公开(公告)日：1982-12-13

申请号：MX17326478

申请日：1978-04-27

Applicant: HOECHST AG

Inventor： LEGUTKE GUNTER ,  RECHMEIER GERHARD ,  SCHOLZ HARALD ,  SCHUCHARDT KURT ,  HOLLER ERNST ,  LIESENFELDER GUNTHER

IPC: B01J27/00 ,  C07B61/00 ,  C07C17/00 ,  C07C17/156 ,  C07C19/045 ,  C07C67/00 ,  C07C17/15

Abstract: 1,2-dichloroethane is made by subjecting ethylene to an oxychlorination reaction with hydrogen chloride and a gas containing molecular oxygen in gas phase, at elevated temperature and in contact with a fluidized bed copper-II-chloride catalyst on a carrier, wherein the reaction gases are cooled under pressure in two condensation stages, condensed 1,2-dichloroethane and water are removed and the bulk of unreacted starting gas and inert gas are recycled. More specifically the reaction gases are delivered to a third condensation stage and cooled therein under pressure down to a temperature within the range 5 DEG to 18 DEG C. and to the extent necessary for the recycle gas to contain 0.5 to 3 volume % of 1,2-dichloroethane. Next, the recycle gas is directly admixed upstream of the reactor, with a quantity of pure oxygen necessary to replace consumed oxygen and re-establish an oxygen content of 12 to 25 volume % therein.

公开(公告)号：CA1127669A

公开(公告)日：1982-07-13

申请号：CA345740

申请日：1980-02-15

Applicant: HOECHST AG

Inventor： CZEKAY ARNO ,  HOLLER ERNST ,  KUXDORF BERNHARD ,  PUSCHE HERBERT ,  NEUSS HANS-WILHELM ,  SCHOLZ HARALD

IPC: C07C17/25 ,  C07C21/06

Abstract: RECOVERY OF PYRCLYTIC ENERGY IN THE PRODUCTION OF VINYL CHLORIDE BY SUBJECTING 1,2-DICHLOROETHANE TO AN INCOMPLETE THERMAL CRACKING REACTION Pyrolytic energy is recovered in the production of vinyl chloride, wherein liquid 1,2-dichloroethane is preheated under pressure, evaporated and introduced in gaseous form into a craking zone, subjected to an incomplete thermal cracking reaction therein, the resulting hot cracked gases maintained under pressure are cooled and succesively separated into their constituents in a plurality of distilling zones for removal of hydrogen chloride, vinyl chloride, and high boilers therefrom, and for recovery of unreacted 1,2dichloroethane. To this end, the hot cracked gases are cooled in at least one heat exchanger of which the jacket side has a heat transfer agent or coolant passed through it, the heat transfer agent or coolant with the heat absorbed therein being removed for use elsewhere in the process.