公开(公告)号：DE3684372D1

公开(公告)日：1992-04-23

申请号：DE3684372

申请日：1986-07-07

Applicant: BASF AG

Inventor： VON OEHSEN UBBO DR ,  STECHER KARLHEINZ DR ,  KOEHLER WALDEMAR DR ,  MUELLER BERTHOLD DR ,  BRUNNMUELLER FRITZ DR ,  SCHNEIDER ROLF DR

IPC: B01J21/12 ,  B01J23/86 ,  C01C3/02

Abstract: Thermolytic cracking of formamide (I) to HCN and H2O is carried out by introducing superheated (I) gas at 300-480 deg.C under reduced pressure of 1-350 mbar and with 0.1-10 vol.% air into a reactor with a nest of tubes and passing at 450-590 deg.C and an average dwell time of 0.01-0.25 s over highly sintered mouldings, consisting of 50-100 wt.% Al2O3 and 50-0 wt. % SiO2 or over Cr-Ni stainless steel mouldings, which are resistant to high temp. corrosion. (I) is introduced at 300-400 deg.C and 50-150 mbar with 1.0-3.0 vol.% air; and cracked at 500-540 deg.C witha dwell time of 0.01-0.15 s.. The mouldings consist of 85-95 wt.% Al2O3 and 15-5 wt.% SiO2; or of 18-21 wt.% Cr, 9-13 wt.% Ni, 0-3 wt.% and the rest Fe.