公开(公告)号：US11897781B2

公开(公告)日：2024-02-13

申请号：US16337156

申请日：2017-09-26

Applicant: EVONIK OPERATIONS GMBH

Inventor： Martin Steurenthaler ,  Martin Steffan ,  Thomas Müller ,  Manfred Bäuml

IPC: C01C3/02 ,  B01J12/00 ,  B01J19/24 ,  B01J23/42

CPC classification number: C01C3/0229 ,  B01J12/005 ,  B01J19/2425 ,  B01J23/42 ,  B01J2219/00038 ,  B01J2219/00051 ,  B01J2219/00182 ,  B01J2219/0883 ,  B01J2219/247

Abstract: In a method for producing hydrogen cyanide by passing a feed mixture comprising ammonia and methane through reaction tubes, coated on the inner surface with a catalyst comprising platinum, at a reaction temperature of 1000° C. to 1400° C., operated for a time period of at least 100 h, the concentration difference between the ammonia concentration and the methane concentration in the product gas mixture is maintained in a range of from 1.05 % by volume to 3.0% by volume for at least 80% of the time.