公开(公告)号：DE2736872A1

公开(公告)日：1979-02-22

申请号：DE2736872

申请日：1977-08-16

Applicant: BASF AG

Inventor： RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN ,  WOLF DIETER DIPL ING DR ,  KUERTEN HERIBERT DIPL ING DR ,  ZEHNER PETER DIPL ING DR

IPC: B01J10/00 ,  B01J19/24 ,  B01J19/26 ,  B01J23/00 ,  C01B21/14

Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction mixture is recycled and the gas mixture, containing nitric oxide and hydrogen, present in the gas space above the reaction zone, is introduced, by means of one or more downwardly directed jets of liquid, consisting of the recycled reaction mixture and issuing from a nozzle orifice, into one or more circulation zones which are present in the reaction zone, are open at both sides, extend in the direction of the entering jet of liquid and are completely covered by the reaction mixture, the reaction mixture leaving the bottom of the circulation zone and containing unconverted gases is deflected, passed upwards in the annular zone externally surrounding the circulation zone, and at the same time reaction mixture of low gas content is recycled from a separation zone located under the reaction zone.

公开(公告)号：DE2645780A1

公开(公告)日：1978-04-13

申请号：DE2645780

申请日：1976-10-09

Applicant: BASF AG

Inventor： KUERTEN HERIBERT DIPL CHEM DR ,  NAGEL OTTO DIPL ING DR ,  ZEHNER PETER DIPL ING DR

IPC: B01F3/04 ,  B01F3/08 ,  B01F5/02 ,  B01F5/10 ,  B01J8/22 ,  B01J10/00 ,  B01J19/24 ,  B01J19/26

Abstract: A process for treating a liquid with a gas in a circulatory reactor, in which the gas is introduced by a jet of liquid into a circulating liquid, is entrained downwards in a tube, rises in an annular space surrounding the tube and-if it has not reacted completely-is again entrained downward over the upper edge of the tube. Using the process according to the invention, a very uniform gas distribution and, in the case of heterogeneous reactions, also a very uniform distribution of the suspended catalyst, is achieved over the entire reaction space.