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    2.
    发明专利
    未知

    公开(公告)号：DE3208695A1

    公开(公告)日：1983-09-22

    申请号：DE3208695

    申请日：1982-03-11

    Applicant: BASF AG

    Inventor： BROECKER FRANZ JOSEF DIPL CHEM ,  GETTERT HANS DIPL CHEM DR ,  KAEMPFER KNUT DIPL CHEM DR

    IPC: B01D53/86 ,  B01J8/02 ,  B01J8/04 ,  B01J8/06 ,  B01J23/22 ,  B01J23/74 ,  B01J23/88 ,  B01J27/00 ,  B01J27/232 ,  C01B17/04 ,  B01D53/36

    Abstract: H2S-containing gases are desulfurized by direct catalytic oxidation of the H2S to elementary sulfur by means of oxygen-containing gases in a tube reactor, with indirect removal of the heat of reaction by means of a coolant and with condensation of the sulfur formed, wherein either the catalyst is present in the jacket space around the tubes and the coolant is present in the tubes of the reactor or the coolant is present in the jacket space around the tubes and the catalyst is present in the tubes of the reactor, and the catalyst fills the tubes of the tube reactor or the jacket space around the tubes over the entire cross-section of the tubes or the jacket space respectively, the exit temperature of the gaseous reaction mixture leaving the tube reactor is kept at 180 DEG -400 DEG C. and the sulfur formed in the tube reactor is separated out of the reaction mixture, obtained in the reactor, in a condensation stage downstream of the reactor.

    6.
    发明专利
    未知

    公开(公告)号：DE2646804A1

    公开(公告)日：1978-04-20

    申请号：DE2646804

    申请日：1976-10-16

    Applicant: BASF AG

    Inventor： GETTERT HANS DIPL CHEM DR ,  FROMM HERMANN DIETER DIPL CHEM ,  MOLZAHN MARTIN DIPL ING DR ,  SCHIER ERNST-JUERGEN DIPL CHEM ,  SCHNEEHAGE HANS HENNIG DIPL CH

    IPC: B01D53/14 ,  C01C1/12

    Abstract: To isolate ammonia from gas mixtures containing ammonia and carbon dioxide, the gas mixture is first partially absorbed in a solvent, with residence times of at most 0.1 second, and the non-absorbed gas is then separated from the solution obtained. The solution is then subjected to a first desorption stage, in which only the ammonia present in an excess over a molar ratio of 3 parts of ammonia to 1 part of carbon dioxide is expelled by heating, and the entrained carbon dioxide is washed out of the expelled ammonia by means of solutions containing free ammonia. The solution remaining after the first desorption stage is substantially freed from ammonia and carbon dioxide in a second desorption stage and the expelled gas, containing solvent, together with fresh gas mixture is fed to the adsorption stage, while the solvent obtained from the second desorption stage is employed for the absorption.

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