公开(公告)号：DE2939674A1

公开(公告)日：1981-04-09

申请号：DE2939674

申请日：1979-09-29

Applicant: HOECHST AG

Inventor： HERBRECHTSMEIER PETER DR ,  STEINER RUDOLF PROF DR ,  VILCSEK HERBERT DR

IPC: B01D53/18 ,  B01D53/34 ,  B01D53/56 ,  B01D53/77 ,  C01B21/40

Abstract: Nitric oxides can be absorbed from gas mixtures containing nitric oxides (NO and NO2) and oxygen by absorption with aqueous solutions. According to the invention, the absorption is effected in bubble columns, superficial velocities of 2 to 30 cm/second being maintained. It is advantageous to connect several bubble columns in series such that the gas and absorption liquid pass in counter-current to one another. In this embodiment, considerably less counter-current stages are required to achieve a high degree of absorption of NOx than in the case of conventional processes. At superficial velocities of 10 to 30 cm/second, large bubbles of gas can rapidly form from the gas introduced and can interact with the absorption liquid only with difficulty. In this case, gas distributor devices are incorporated in the bubble column. Since NO2 is more readily absorbed than NO, it is advantageous to connect flow reactors, in which NO2 is formed from NO and O2, upstream of the bubble columns.

公开(公告)号：DE3326639A1

公开(公告)日：1985-01-31

申请号：DE3326639

申请日：1983-07-23

Applicant: HOECHST AG

Inventor： SEMEL JOACHIM DR ,  VILCSEK HERBERT DR ,  WOLSTEIN FRIEDRICH DR

IPC: B01D53/94 ,  B01D53/86 ,  C01B21/26 ,  B01D53/36 ,  C01B21/38

公开(公告)号：DE3066504D1

公开(公告)日：1984-03-15

申请号：DE3066504

申请日：1980-09-20

Applicant: HOECHST AG

Inventor： HERBRECHTSMEIER PETER DR ,  STEINER RUDOLF DR PROF ,  VILCSEK HERBERT DR

IPC: B01D53/18 ,  B01D53/34 ,  B01D53/56 ,  B01D53/77 ,  C01B21/40

Abstract: Nitric oxides can be absorbed from gas mixtures containing nitric oxides (NO and NO2) and oxygen by absorption with aqueous solutions. According to the invention, the absorption is effected in bubble columns, superficial velocities of 2 to 30 cm/second being maintained. It is advantageous to connect several bubble columns in series such that the gas and absorption liquid pass in counter-current to one another. In this embodiment, considerably less counter-current stages are required to achieve a high degree of absorption of NOx than in the case of conventional processes. At superficial velocities of 10 to 30 cm/second, large bubbles of gas can rapidly form from the gas introduced and can interact with the absorption liquid only with difficulty. In this case, gas distributor devices are incorporated in the bubble column. Since NO2 is more readily absorbed than NO, it is advantageous to connect flow reactors, in which NO2 is formed from NO and O2, upstream of the bubble columns.

公开(公告)号：DE2929357A1

公开(公告)日：1981-02-12

申请号：DE2929357

申请日：1979-07-20

Applicant: HOECHST AG

Inventor： KAU HEINZ DIPL CHEM DR ,  SEMMLER HANS-JOACHIM DIPL CHEM ,  VILCSEK HERBERT DR

IPC: C25B1/00 ,  C25B1/16

公开(公告)号：CH375899A

公开(公告)日：1964-03-15

申请号：CH6187458

申请日：1958-07-17

Applicant: HOECHST AG

Inventor： STARCK WERNER DR ,  ROCHLITZ FRITZ DR ,  VILCSEK HERBERT DR ,  WINTER JAKOB DR

IPC: C08G79/04