公开(公告)号：US3512925A

公开(公告)日：1970-05-19

申请号：US3512925D

申请日：1967-07-12

Applicant: BASF AG

Inventor： BUECHLER GUENTER ,  ENGELBACH HEINZ ,  THEOBALD HEINZ

IPC: B01D53/00 ,  C01B21/24 ,  C01B21/20

CPC classification number: B01D53/8628 ,  B01D2251/202 ,  B01D2255/104 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/2092 ,  B01D2257/104 ,  B01D2257/404 ,  C01B21/24 ,  Y02A50/2345

公开(公告)号：US3489515A

公开(公告)日：1970-01-13

申请号：US51589665

申请日：1965-12-23

Applicant: BASF AG

Inventor： JOCKERS KURT ,  KRAUSS KURT ,  THEOBALD HEINZ

IPC: C01B21/24 ,  C01B21/26

CPC classification number: C01B21/26 ,  C01B21/24

公开(公告)号：GB1058970A

公开(公告)日：1967-02-15

申请号：GB5490865

申请日：1965-12-28

Applicant: BASF AG

Inventor： JOCKERS KURT ,  KRAUSS KURT ,  THEOBALD HEINZ

IPC: C01B21/24 ,  C01B21/26

Abstract: NO obtained by the catalytic oxidation of NH3 in the presence of steam and containing NO2 and H2O is purified by indirect cooling to 80-92 DEG C. to remove 70-85% of the water as nitric acid of less than 1% concentration, followed by direct cooling with nitric acid of at least 15% concentration, which is recycled. The oxidation may be effected at 850-900 DEG C. using a Pt-Rh catalyst, and the gases leave at 130-150 DEG C. The recycle acid may be cooled indirectly with water and/or brine to 13-42 DEG C., and preferably has a concentration of 18-21%; part is withdrawn as product.

公开(公告)号：FR1462040A

公开(公告)日：1966-12-09

申请号：FR44127

申请日：1965-12-29

Applicant: BASF AG

Inventor： JOCKERS KURT ,  KRAUSS KURT ,  THEOBALD HEINZ

IPC: C01B21/24 ,  C01B21/26

Abstract: NO obtained by the catalytic oxidation of NH3 in the presence of steam and containing NO2 and H2O is purified by indirect cooling to 80-92 DEG C. to remove 70-85% of the water as nitric acid of less than 1% concentration, followed by direct cooling with nitric acid of at least 15% concentration, which is recycled. The oxidation may be effected at 850-900 DEG C. using a Pt-Rh catalyst, and the gases leave at 130-150 DEG C. The recycle acid may be cooled indirectly with water and/or brine to 13-42 DEG C., and preferably has a concentration of 18-21%; part is withdrawn as product.