公开(公告)号：ZA9811463B

公开(公告)日：1999-06-14

申请号：ZA9811463

申请日：1998-12-14

Applicant: DEGUSSA

Inventor： MAGIERA ROBERT ,  ALT HANS CHRISTIAN ,  RASIG GERHARD ,  MUENZENBERG JOERG ,  BATZ-SOHN CHRISTOPH ,  GOEDECKE RALF ,  DESCHLER ULRICH ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

IPC: C01B17/38 ,  C01B

Abstract: In the production of anhydrous sodium sulfide, sodium sulfide containing 35-45% water with mixing is passed through an apparatus, in which the product temperature of approximately 20 degrees C at the place of solid injection gradually rises to at least 180 degrees C while the subpressure is maintained at less than 20, preferably less than 11 torr.

公开(公告)号：DK0924165T3

公开(公告)日：2003-10-06

申请号：DK98122604

申请日：1998-11-27

Applicant: DEGUSSA

Inventor： MAGIERA ROBERT DR ,  ALT CHRISTIAN ,  RASIG GERHARD ,  MUENZENBERG JOERG DR ,  BATZ-SOHN CHRISTOPH DR ,  GOEDECKE RALF DR ,  DESCHLER ULRICH DR ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

IPC: C01B17/38

Abstract: In the production of anhydrous sodium sulfide, sodium sulfide containing 35-45% water with mixing is passed through an apparatus, in which the product temperature of approximately 20 degrees C at the place of solid injection gradually rises to at least 180 degrees C while the subpressure is maintained at less than 20, preferably less than 11 torr.

公开(公告)号：DE59808752D1

公开(公告)日：2003-07-24

申请号：DE59808752

申请日：1998-11-27

Applicant: DEGUSSA

Inventor： MAGIERA ROBERT DR ,  ALT CHRISTIAN ,  RASIG GERHARD ,  MUENZENBERG JOERG DR ,  BATZ-SOHN CHRISTOPH DR ,  GOEDECKE RALF DR ,  DESCHLER ULRICH DR ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

IPC: C01B17/38

Abstract: In the production of anhydrous sodium sulfide, sodium sulfide containing 35-45% water with mixing is passed through an apparatus, in which the product temperature of approximately 20 degrees C at the place of solid injection gradually rises to at least 180 degrees C while the subpressure is maintained at less than 20, preferably less than 11 torr.

公开(公告)号：AT243164T

公开(公告)日：2003-07-15

申请号：AT98122604

申请日：1998-11-27

Applicant: DEGUSSA

Inventor： MAGIERA ROBERT DR ,  ALT CHRISTIAN ,  RASIG GERHARD ,  MUENZENBERG JOERG DR ,  BATZ-SOHN CHRISTOPH DR ,  GOEDECKE RALF DR ,  DESCHLER ULRICH DR ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

IPC: C01B17/38

Abstract: In the production of anhydrous sodium sulfide, sodium sulfide containing 35-45% water with mixing is passed through an apparatus, in which the product temperature of approximately 20 degrees C at the place of solid injection gradually rises to at least 180 degrees C while the subpressure is maintained at less than 20, preferably less than 11 torr.

公开(公告)号：TR9802601A2

公开(公告)日：1999-07-21

申请号：TR9802601

申请日：1998-12-15

Applicant: DEGUSSA

Inventor： MAGIERA DR ROBERT ,  ALT HANS CHRISTIAN ,  RASIG GERHARD ,  MUENZENBERG DR JOERG ,  BATZ-SOHN DR CHRISTOPH ,  GOEDECKE DR RALF ,  DESCHLER DR ULRICH ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

IPC: C01B17/38

CPC classification number: C01B17/38

公开(公告)号：TR199802601A2

公开(公告)日：1999-07-21

申请号：TR9802601

申请日：1998-12-15

Applicant: DEGUSSA

Inventor： MAGIERA DR ROBERT ,  ALT HANS CHRISTIAN ,  RASIG GERHARD ,  MUENZENBERG DR JOERG ,  BATZ-SOHN DR CHRISTOPH ,  GOEDECKE DR RALF ,  DESCHLER DR ULRICH ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

IPC: C01B17/38

Abstract: In the production of anhydrous sodium sulfide, sodium sulfide containing 35-45% water with mixing is passed through an apparatus, in which the product temperature of approximately 20 degrees C at the place of solid injection gradually rises to at least 180 degrees C while the subpressure is maintained at less than 20, preferably less than 11 torr.

公开(公告)号：CA2256134A1

公开(公告)日：1999-06-16

申请号：CA2256134

申请日：1998-12-15

Applicant: DEGUSSA

Inventor： ALT HANS CHRISTIAN ,  DESCHLER ULRICH ,  KNAPP VOLKER ,  RASIG GERHARD ,  RUETZEL KARL-HEINZ ,  MUENZENBERG JOERG ,  GOEDECKE RALF ,  BATZ-SOHN CHRISTOPH ,  MAGIERA ROBERT

IPC: C01B17/38

Abstract: The invention provides a process for the preparation of anhydrous sodium sulfide by heating sodium sulfide having a water content of about 35 to 45 % in a drier under reduced pressure, the temperature of the water-containing sodium sulfide to be dried being increased from approximately 20.degree.C at the drier inlet to at least about 180.degree.C at its outlet. Preferably, the apparatus is a contact-type drier, and the sodium sulfide is in a comminuted form, more particularly in the form of scales, lamellae or flakes having an edge length of from 5 to 8 mm. The method can produce anhydrous sodium sulfide having a content of at least about 98% Na2S.