公开(公告)号：AP200904795A0

公开(公告)日：2009-04-30

申请号：AP200904795

申请日：2007-08-28

Applicant: BASF SE

Inventor： DECKERS ANDREAS ,  SCHNEIDER THOMAS

IPC: C01C3/02

公开(公告)号：CA2662722A1

公开(公告)日：2008-03-13

申请号：CA2662722

申请日：2007-08-28

Applicant: BASF SE

Inventor： DECKERS ANDREAS ,  SCHNEIDER THOMAS

IPC: C01C3/02

Abstract: The invention relates to a method for the production of prussic acid, com prising the catalytic dehydration of gaseous formamide to give a product mix ture, containing prussic acid, water, formamide, ammonia, CO and high-boiler s, separation of the product mixture by condensation of a condensate from th e product mixture which contains water, formamide, high-boilers and possibly ammonia and prussic acid, and the partial or complete recycling of the cond ensate to a heat exchanger downstream of the reactor.

公开(公告)号：CA2641462A1

公开(公告)日：2007-08-16

申请号：CA2641462

申请日：2007-01-22

Applicant: BASF SE

Inventor： DECKERS ANDREAS ,  SCHNEIDER THOMAS

IPC: C22B11/08 ,  C01C3/08 ,  C22B3/44

Abstract: The present invention relates to solutions comprising water and at least one metal cyanide, at least a part of the water being obtained from wastewater which occurs as depleted wastewater in a process for extracting noble metals from noble metal-containing ores by the cyanide process, the process for the preparation of solutions according to the invention and to the use of the solutions according to the invention in a process for extracting noble metals from noble metal-containing ores by the cyanide process, to a process for extracting noble metals from noble metal-containing ores by the cyanide process, wherein the solution according to the invention is used, and to the use of depleted wastewater occurring in the extraction of noble metals from noble metal-containing ores by the cyanide process to the preparation of solutions comprising water and at least one metal cyanide.

公开(公告)号：AU2007213892A1

公开(公告)日：2007-08-16

申请号：AU2007213892

申请日：2007-01-22

Applicant: BASF SE

Inventor： SCHNEIDER THOMAS ,  DECKERS ANDREAS

IPC: C22B11/08 ,  C01C3/08 ,  C22B3/44

Abstract: The present invention relates to solutions comprising water and at least one metal cyanide, at least a part of the water being obtained from wastewater which occurs as depleted wastewater in a process for extracting noble metals from noble metal-containing ores by the cyanide process, the process for the preparation of solutions according to the invention and to the use of the solutions according to the invention in a process for extracting noble metals from noble metal-containing ores by the cyanide process, to a process for extracting noble metals from noble metal-containing ores by the cyanide process, wherein the solution according to the invention is used, and to the use of depleted wastewater occurring in the extraction of noble metals from noble metal-containing ores by the cyanide process to the preparation of solutions comprising water and at least one metal cyanide.