公开(公告)号：HU219385B

公开(公告)日：2001-03-28

申请号：HU9601545

申请日：1994-12-06

Applicant: HOECHST AG

Inventor： KALLIWODA HELMUT ,  KAMMERHOFER PETER ,  MIELKE INGOLF ,  SCHWARZMAIER PETER ,  STOEGER MANFRED

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06

Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

公开(公告)号：BG62484B1

公开(公告)日：1999-12-30

申请号：BG10057696

申请日：1996-05-07

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  KAMMERHOFER PETER ,  STOEGER MANFRED ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06

Abstract: In the production of vinyl chloride by the thermal splittingof 1,2-dichloroethane, first of all hydrogen chloride, then vinylchloride and finally hydrogen chloride taken along with vinylchloride are distilled off in three stages. If water carried overin the final stage is not drained off through the bottom of thestage, it is taken back with the head product into the first stageand causes corrosion. Removal of the water at the head of thethird distillation stage, preferably by drying, preventscorrosion.7 claims, 1 figure

公开(公告)号：ZA975978B

公开(公告)日：1998-01-05

申请号：ZA975978

申请日：1997-07-04

Applicant: HOECHST AG

Inventor： WILD THOMAS ,  WIDMANN PETER ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J27/138 ,  C07C17/08 ,  C07C17/25 ,  C07C17/38 ,  C07C

公开(公告)号：CZ289769B6

公开(公告)日：2002-04-17

申请号：CZ165096

申请日：1994-12-06

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  KAMMERHOFER PETER ,  STOEGER MANFRED ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06

Abstract: The present process for preparing vinyl chloride by thermal cracking of 1,2-dichloroethanue in three distillation stages is characterized in that hydrogen chloride is first distilled off followed by vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. When water being entrained in the last stage is not removed over the bottom it is introduced together with the head product back into the first stage and causes corrosion. Corrosion can be prevented by removal of water in the third distillation stage head, being carried out preferably by drying.

公开(公告)号：AU3439297A

公开(公告)日：1998-02-02

申请号：AU3439297

申请日：1997-06-30

Applicant: HOECHST AG

Inventor： WILD THOMAS ,  WIDMANN PETER ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J27/138 ,  C07C17/08 ,  C07C17/25 ,  C07C17/38 ,  C07C17/395 ,  C07C21/06

公开(公告)号：HUT74047A

公开(公告)日：1996-10-28

申请号：HU9601545

申请日：1994-12-06

Applicant: HOECHST AG

Inventor： KALLIWODA HELMUT ,  KAMMERHOFER PETER ,  MIELKE INGOLF ,  SCHWARZMAIER PETER ,  STOEGER MANFRED

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06

Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

公开(公告)号：ZA949784B

公开(公告)日：1995-07-11

申请号：ZA949784

申请日：1994-12-08

Applicant: HOECHST AG

Inventor： KAMMERHOFER PETER ,  SCHARZMAIER PETER ,  STOEGER MANFRED ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06 ,  C07C

Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

公开(公告)号：ES2116711T3

公开(公告)日：1998-07-16

申请号：ES95902128

申请日：1994-12-06

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  KAMMERHOFER PETER ,  STOEGER MANFRED ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06

Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

公开(公告)号：DE59405663D1

公开(公告)日：1998-05-14

申请号：DE59405663

申请日：1994-12-06

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  KAMMERHOFER PETER ,  STOEGER MANFRED ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: B01J14/00 ,  C07C17/25 ,  C07C17/38 ,  C07C17/383 ,  C07C17/389 ,  C07C21/06

Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.

公开(公告)号：IN180126B

公开(公告)日：1998-01-10

申请号：IN847CA1994

申请日：1994-10-17

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  KAMMERHOFER PETER ,  STOEGER MANFRED ,  KALLIWODA HELMUT ,  MIELKE INGOLF

IPC: C07C7/12 ,  C07