公开(公告)号：BR8503457A

公开(公告)日：1986-04-15

申请号：BR8503457

申请日：1985-07-19

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  KAULICH HERBERT ,  SCHAFFELHOFER IWO DR

IPC: C07D303/04 ,  B01J23/66 ,  B01J37/02 ,  C07B61/00 ,  C07D301/10 ,  B01J23/54

公开(公告)号：DE3063906D1

公开(公告)日：1983-07-28

申请号：DE3063906

申请日：1980-09-13

Applicant: HOECHST AG

Inventor： ALFRANSEDER JOSEF ,  MAYER SIGMUND ,  REBSDAT SIEGFRIED DR ,  RIEDL JOSEF DR ,  SCHAFFELHOFER IWO DR

IPC: B01J23/50 ,  B01J23/66 ,  B01J23/68 ,  B01J23/96 ,  B01J38/48 ,  B01J38/66 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04

公开(公告)号：DE2350567A1

公开(公告)日：1975-04-10

申请号：DE2350567

申请日：1973-10-09

Applicant: HOECHST AG

Inventor： SCHAFFELHOFER IWO DR

IPC: C07C29/76 ,  C07C20060101 ,  C07C27/00 ,  C07C27/26 ,  C07C31/20 ,  C07C67/00 ,  C07D301/04 ,  C02C5/00

公开(公告)号：DE3564384D1

公开(公告)日：1988-09-22

申请号：DE3564384

申请日：1985-07-11

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  KAULICH HERBERT ,  SCHAFFELHOFER IWO DR

IPC: C07D303/04 ,  B01J23/66 ,  B01J37/02 ,  C07B61/00 ,  C07D301/10

公开(公告)号：DE3519161A1

公开(公告)日：1986-12-04

申请号：DE3519161

申请日：1985-05-29

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  FROEHLICH WALTER DR ,  KUEHN WENZEL DR ,  RIEDL JOSEF DR ,  SCHAFFELHOFER IWO DR ,  MITTERMAIER ERICH ,  KRUMBOECK REINHARD

IPC: C07C17/04 ,  C07C17/00 ,  C07C17/38 ,  C07C17/383 ,  C07C19/045 ,  C07C67/00

Abstract: A process for the purification of 1,2-dichloroethane is described, in which the crude product, containing not more than 3% by weight of high-boilers, is distilled in a first column at 125 DEG to 180 DEG C. in such a way that the bottom product contains not more than 7% by weight of high-boilers. The purified, vaporous 1,2-dichloroethane discharged at the head of this column is used to heat product streams containing 1,2-dichloroethane. The bottom product from the first column is distilled in a second column, advantageously at a pressure of 5 to 40 kPa, together with a feed composed of vaporous 1,2-dichloroethane obtained from the reaction of ethylene with chlorine. The process makes it possible to purify 1,2-dichloroethane with a saving in energy.

公开(公告)号：DE3662257D1

公开(公告)日：1989-04-13

申请号：DE3662257

申请日：1986-05-16

Applicant: HOECHST AG

Inventor： SCHWARZMAIER PETER ,  FROHLICH WALTER DR ,  KUHN WENZEL DR ,  RIEDL JOSEF DR ,  SCHAFFELHOFER IWO DR ,  MITTERMAIER ERICH ,  KRUMBOCK REINHARD

IPC: C07C17/04 ,  C07C17/00 ,  C07C17/38 ,  C07C17/383 ,  C07C19/045 ,  C07C67/00

Abstract: A process for the purification of 1,2-dichloroethane is described, in which the crude product, containing not more than 3% by weight of high-boilers, is distilled in a first column at 125 DEG to 180 DEG C. in such a way that the bottom product contains not more than 7% by weight of high-boilers. The purified, vaporous 1,2-dichloroethane discharged at the head of this column is used to heat product streams containing 1,2-dichloroethane. The bottom product from the first column is distilled in a second column, advantageously at a pressure of 5 to 40 kPa, together with a feed composed of vaporous 1,2-dichloroethane obtained from the reaction of ethylene with chlorine. The process makes it possible to purify 1,2-dichloroethane with a saving in energy.

公开(公告)号：DE3426699A1

公开(公告)日：1986-01-23

申请号：DE3426699

申请日：1984-07-20

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  KAULICH HERBERT ,  SCHAFFELHOFER IWO DR

IPC: C07D303/04 ,  B01J23/66 ,  B01J37/02 ,  C07B61/00 ,  C07D301/10

公开(公告)号：DE3160020D1

公开(公告)日：1983-02-17

申请号：DE3160020

申请日：1981-01-07

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  SCHAFFELHOFER IWO DR

IPC: C07C27/00 ,  C07C29/10 ,  C07C29/132 ,  C07C29/80 ,  C07C29/88 ,  C07C31/20 ,  C07C67/00

公开(公告)号：ES2054710T3

公开(公告)日：1994-08-16

申请号：ES88100904

申请日：1988-01-22

Applicant: HOECHST AG ,  UHDE GMBH

Inventor： LINK GERHARD ,  FROHLICH WALTER DR ,  KRUMBOCK REINHARD ,  PRANTL GEORG ,  SCHAFFELHOFER IWO DR

IPC: C07C21/06 ,  C07C17/00 ,  C07C17/25 ,  C07C67/00 ,  C07C17/34

Abstract: Gaseous 1,2-dichloroethane which has been produced in a variety of ways is heated indirectly by the hot, vinyl chloride-containing gases which are led away from the radiation zone of the pyrolysis furnace. This allows the heat of the pyrolysis gases to be utilised in a favourable manner, pyrolysis rates to be increased, and operation times of the pyrolysis furnace to be prolonged.

公开(公告)号：DE3878701D1

公开(公告)日：1993-04-08

申请号：DE3878701

申请日：1988-01-22

Applicant: HOECHST AG ,  UHDE GMBH

Inventor： LINK GERHARD ,  FROEHLICH WALTER DR ,  KRUMBOECK REINHARD ,  PRANTL GEORG ,  SCHAFFELHOFER IWO DR

IPC: C07C21/06 ,  C07C17/00 ,  C07C17/25 ,  C07C67/00 ,  C07C17/34

Abstract: Prodn. of vinyl chloride (I) from 1,2-dichloroethane (II) is carried out by thermal elimination of HCl in a cracking furnace contg. a radiation zone. The novelty is that a gas contg. at least 95 wt.% (II) is heated in a heat exchanger by indirect heat exchange with hot gas contg. (I) leaving the radiation zone and then passed into the furnace. The furnace pref. contains a radiation and a convection zone and the hot gas contg. at least 95 wt.% (II) is produced from liq. (II) in the convection zone by indirect heat exchange with the flue gas. Alternatively, gas contg. at least 85, pref. at least 95 wt.% (II) is produced from liq. (II) entirely or partly outside the furnace in a vaporiser, pref. by indirect heat exchange with hot gas contg. (I) discharged from the radiation zone.