公开(公告)号：DE3525749A1

公开(公告)日：1987-01-29

申请号：DE3525749

申请日：1985-07-19

Applicant: BASF AG

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

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

Abstract: A process for the thermolytic cleavage of formamide to give hydrocyanic acid and water over alumina or alumina/silica moldings subjected to final sintering or over high temperature corrosion-resistant stainless steel packings in the presence of atmospheric oxygen possesses, in particular, high HCN selectively and a high formamide conversion.

公开(公告)号：DE3629477A1

公开(公告)日：1988-03-03

申请号：DE3629477

申请日：1986-08-29

Applicant: BASF AG

Inventor： LEUTNER BERND DR ,  MUELLER BERTHOLD DR ,  VOLKENBORN WILHELM DIPL ING

IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00 ,  E21F15/08

Abstract: Cavities in mining are filled by introducing a mixture consisting of a slurry or sludge which evolves CO2, foams and solidifies and predominantly comprises alpha-hemihydrate, alpha-CaSO4. 0.5 H2O, an alkali metal or alkaline earth metal carbonate and water, by a method in which the mixture is mixed with a bisulfate-containing aqueous solution or suspension of one or more metals before being introduced into the cavities to be filled.

公开(公告)号：DE3068321D1

公开(公告)日：1984-07-26

申请号：DE3068321

申请日：1980-11-05

Applicant: BASF AG

Inventor： KOEHLER WALDEMAR DR ,  LANGENSIEPEN HANS-WERNER DR ,  MUELLER BERTHOLD DR

IPC: C08G12/08 ,  C07C85/24 ,  C07C85/08 ,  C07C85/26 ,  C07C87/50

公开(公告)号：DE3778276D1

公开(公告)日：1992-05-21

申请号：DE3778276

申请日：1987-08-22

Applicant: BASF AG

Inventor： LEUTNER BERND DR ,  MUELLER BERTHOLD DR ,  VOLKENBORN WILHELM

IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00

Abstract: In the filling of mine cavities using a mixt. of CO2-evolving, foaming and setting slurry of mainly alpha hemihydrate, alkaline (ne earth) carbonate and water, the novelty is that, prior to introduction into the cavities, the mixt. is mixed with a hydrogen sulphate-contg. aq. soln. or suspension of one or more metals.

公开(公告)号：AT74888T

公开(公告)日：1992-05-15

申请号：AT87112204

申请日：1987-08-22

Applicant: BASF AG

Inventor： LEUTNER BERND DR ,  MUELLER BERTHOLD DR ,  VOLKENBORN WILHELM

IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00

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.