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：CZ286067B6

公开(公告)日：2000-01-12

申请号：CZ194595

申请日：1994-01-21

Applicant: HOECHST AG

Inventor： EICHLER JUERGEN ,  KRUMBOECK REINHARD ,  KUEHN WENZEL ,  SCHWARZMAIER PETER ,  WILD THOMAS ,  SPIELMANNLEITNER RUDOLF ,  STOEGER MANFRED ,  MIELKE INGOLF

IPC: B01J27/128 ,  C07B61/00 ,  C07C17/02 ,  C07C19/045

Abstract: In the present invention there is disclosed a process for preparing 1,2-dichloroethane by reacting ethylene with chlorine in the presence of a catalyst based on sodium chloride and iron(III) chloride, during which process the molar ratio of sodium chloride to iron(III) chloride is maintained below 0.5 all over the reaction. The proposed process is carried out at a temperature ranging from 50 to 105 degC and under positive pressure up to 0.1 MPa. The apparatus for making the above described process comprises a reactor (1) that is interconnected through the mediation of a piping (5) with a decompression tank (6) that is provided with a piping (7) for offtake of evaporated product and a piping (8) for backflow of the non-evaporated product, whereby a piping (11) for backflow of the product partial flow into the reactor (1) is branched from said pining (5).

公开(公告)号：RU2132324C1

公开(公告)日：1999-06-27

申请号：RU96117972

申请日：1995-02-06

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  HAECKL PETER ,  STOEGER MANFRED ,  MIELKE INGOLF

IPC: C07C17/25 ,  C07C21/06

Abstract: FIELD: chemical technology. SUBSTANCE: method involves the measurement of high-energetic radiation absorption, pressure and temperature values of the furnace decomposition outlet gas flow. On the basis of measured values the working gas density value is measured and used in the following for regulation of the conversion degree. EFFECT: improved method of synthesis, decreased formation of by-side substances and coke especially. 4 cl, 1 ex

公开(公告)号：ID19372A

公开(公告)日：1998-07-02

申请号：ID973225

申请日：1997-09-18

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  MIELKE INGOLF ,  GRUMANN HELMUT

IPC: C01B9/02 ,  C07C17/093

公开(公告)号：GR3025326T3

公开(公告)日：1998-02-27

申请号：GR970402968

申请日：1997-11-07

Applicant: HOECHST AG

Inventor： EICHLER JUERGEN ,  KRUMBOECK REINHARD ,  KOEHN WENZEL ,  SCHWARZMAIER PETER ,  WILD THOMAS ,  SPIELMANNLEITNER RUDOLF ,  STOEGER MANFRED ,  MIELKE INGOLF

IPC: B01J27/128 ,  C07B61/00 ,  C07C17/02 ,  C07C19/045

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：DE59404033D1

公开(公告)日：1997-10-16

申请号：DE59404033

申请日：1994-01-21

Applicant: HOECHST AG

Inventor： EICHLER JUERGEN ,  KRUMBOECK REINHARD ,  KOEHN WENZEL ,  SCHWARZMAIER PETER ,  WILD THOMAS ,  SPIELMANNLEITNER RUDOLF ,  STOEGER MANFRED ,  MIELKE INGOLF

IPC: B01J27/128 ,  C07C17/02 ,  C07C19/045

Abstract: Process and apparatus for preparing 1,2-Dichloroethane by direct chlorinationIf in the reaction of ethylene with chlorine to form 1,2-dichloroethane (EDC) the catalyst components sodium chloride and iron(III) chloride are used in a molar ratio of below 0.5, then the EDC is obtained in sufficiently high purity to allow direct conversion to vinyl chloride. With maintenance of the stated molar ratio the reaction can be carried out very advantageously in terms of equipment and energy consumption, for example by vaporizing some of the EDC in an expansion vessel.

公开(公告)号：SK6297A3

公开(公告)日：1997-06-04

申请号：SK6297

申请日：1995-07-15

Applicant: HOECHST AG

Inventor： EICHLER JUERGEN ,  MIELKE INGOLF ,  SCHWARZMAIER PETER ,  STOEGER MANFRED ,  WILD THOMAS

IPC: B01J27/128 ,  C07B61/00 ,  C07C17/02 ,  C07C19/045

Abstract: The invention concerns a process for preparing 1,2-dichloroethane (EDC) by feeding chlorine and ethylene into circulated EDC which contains a catalyst. A partial stream of the reaction mixture is fed to a flash vaporization system and the vaporized EDC is separated from its light volatile components which are returned to the reaction.

公开(公告)号：FI970216A

公开(公告)日：1997-01-17

申请号：FI970216

申请日：1997-01-17

Applicant: HOECHST AG

Inventor： EICHLER JUERGEN ,  MIELKE INGOLF ,  SCHWARZMAIER PETER ,  STOEGER MANFRED ,  WILD THOMAS

IPC: B01J27/128 ,  C07B61/00 ,  C07C17/02 ,  C07C19/045 ,  C07C

Abstract: The invention concerns a process for preparing 1,2-dichloroethane (EDC) by feeding chlorine and ethylene into circulated EDC which contains a catalyst. A partial stream of the reaction mixture is fed to a flash vaporization system and the vaporized EDC is separated from its light volatile components which are returned to the reaction.

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.