公开(公告)号：JPH0358960A

公开(公告)日：1991-03-14

申请号：JP19317690

申请日：1990-07-23

Applicant: BAYER AG

Inventor： PEETAA BIMAA ,  HANSUUYOZEFU BUISHIYU ,  ROTAARU PUTSUPE ,  KURISUCHIYAN FUREERITSUHI

IPC: C07C209/18 ,  C07C211/48

公开(公告)号：JPH0210761B2

公开(公告)日：1990-03-09

申请号：JP6752082

申请日：1982-04-23

Applicant: BAYER AG

Inventor： ROTAARU PUTSUPE ,  YURUGEN BAISAA

IPC: B01J29/00 ,  B01J29/70 ,  B01J39/14 ,  C01B33/40 ,  C01B39/04 ,  C01B39/48 ,  C07B61/00 ,  C07C1/00 ,  C07C1/04 ,  C07C1/20 ,  C07C67/00 ,  F02B1/04

公开(公告)号：JPS63283727A

公开(公告)日：1988-11-21

申请号：JP9044288

申请日：1988-04-14

Applicant: BAYER AG

Inventor： BORUFUGANGU HERUTO ,  AKUSERU KEENITSUHI ,  ROTAARU PUTSUPE

IPC: F01N3/28 ,  B01D53/94 ,  B01J29/04 ,  B01J29/70 ,  B01J29/76 ,  B01J29/78 ,  F01N3/20 ,  F01N3/24 ,  F01N3/36

公开(公告)号：JP2553237B2

公开(公告)日：1996-11-13

申请号：JP22015090

申请日：1990-08-23

Applicant: BAYER AG

Inventor： HANSUUYOZEFU BUISHU ,  HAINRITSUHI PERUSUTAA ,  ROTAARU PUTSUPE ,  PEETAA BIMAA

IPC: B01J29/06 ,  B01J29/70 ,  C07B61/00 ,  C07C209/14 ,  C07C209/18 ,  C07C211/48

公开(公告)号：JPH03106851A

公开(公告)日：1991-05-07

申请号：JP22015090

申请日：1990-08-23

Applicant: BAYER AG

Inventor： HANSUUYOZEFU BUISHIYU ,  HAINRITSUHI PERUSUTAA ,  ROTAARU PUTSUPE ,  PEETAA BIMAA

IPC: B01J29/06 ,  B01J29/70 ,  C07B61/00 ,  C07C209/14 ,  C07C209/18 ,  C07C211/48

公开(公告)号：JPH021431A

公开(公告)日：1990-01-05

申请号：JP2093089

申请日：1989-02-01

Applicant: BAYER AG

Inventor： GIYUNTAA KURUUKU ,  HANSUUYOZEFU BUISHIYU ,  ROTAARU PUTSUPE

IPC: B01J29/06 ,  B01J29/40 ,  B01J29/80 ,  C07B61/00 ,  C07C67/00 ,  C07C209/00 ,  C07C209/14 ,  C07C209/18 ,  C07C211/48 ,  C07C211/52 ,  C07C213/02 ,  C07C217/84

公开(公告)号：JPS6072864A

公开(公告)日：1985-04-24

申请号：JP18663484

申请日：1984-09-07

Applicant: BAYER AG

Inventor： HERUMUUTO RE BURANKU ,  ROTAARU PUTSUPE ,  KARURUFURIITO BEDEMAIYAA

IPC: C07D213/73

公开(公告)号：JPS53125996A

公开(公告)日：1978-11-02

申请号：JP4045078

申请日：1978-04-07

Applicant: BAYER AG

Inventor： HORUSUTO BEEBAA ,  GIYUNTAA URITSUSHIYU ,  ROTAARU PUTSUPE

IPC: C01B39/18 ,  C01B20060101 ,  C01B33/26 ,  C08K3/34

公开(公告)号：JPH03118341A

公开(公告)日：1991-05-20

申请号：JP23726690

申请日：1990-09-10

Applicant: BAYER AG

Inventor： ARUTOUURU BOTSUTA ,  HANSUUYOZEFU BUISHIYU ,  ROTAARU PUTSUPE

IPC: C07C41/22 ,  B01J29/50 ,  B01J29/60 ,  B01J29/70 ,  C07B61/00 ,  C07C17/12 ,  C07C25/18 ,  C07C41/38 ,  C07C43/225

公开(公告)号：JPH02139019A

公开(公告)日：1990-05-29

申请号：JP22476489

申请日：1989-09-01

Applicant: BAYER AG ,  VOLKSWAGEN AG

Inventor： BORUFUGANGU HERUTO ,  AKUSERU KEENIHI ,  ROTAARU PUTSUPE

IPC: B01D53/94 ,  B01J29/06 ,  B01J29/072 ,  F01N3/20 ,  F01N13/02

Abstract: PURPOSE: To remove nitrogen oxides from the exhaust gases of internal combustion engines by adding urea or a urea-contg. reducing agent to the exhaust gases and brining the exhaust gases into contact with a zeolite-contg. catalyst under oxidizing conditions. CONSTITUTION: When the exhaust gas is brought into contact with the zeolite- contg. catalyst 5 under oxidizing conditions in the presence of a reducing agent in the exhaust gas so as to reduce nitrogen oxides in the exhaust gas of an internal combustion engine 1, urea or a urea-cong. substance is used as the reducing agent. Before the reducing agent in a tank 8 is added to the exhaust gas, the reducing agent is heated to the decomposition temp. by a heating device 10. The amt. of the reducing agent to be added is controlled depending on the operation parameters of the engine which produces the exhaust gas, namely, the rotation speed and the load of the engine. Namely, the add amt. of the reducing agent is controlled so that the necessary amt. to completely reduce nitrogen oxides is added by comparing to the memory device 11 of the characteristics curves of the nitrogen oxides content in the exhaust gas with respect to the various values of the operation parameters.