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    2.
    发明专利
    未知

    公开(公告)号：DD269324A5

    公开(公告)日：1989-06-28

    申请号：DD31356888

    申请日：1988-03-10

    Applicant: HOECHST AG

    Inventor： BENNOIT HORST ,  FROEHLICH WALTER ,  HOELTERMANN ROLF ,  KRUMBOECK REINHARD

    IPC: B01D17/038 ,  B04C5/081 ,  C07C17/156 ,  C07C17/38 ,  B04C5/00 ,  C07C17/34

    Abstract: A process for the removal of solid particles from a mixture containing at least one liquid chlorinated hydrocarbon is described. The solids-containing liquid mixture is introduced into at least one hydrocyclone having a downstream separator. The liquid mixture which has been enriched in solids and discharged from the hydrocyclone is preferably subjected to sedimentation of the solid particles, without the use of centrifugal forces. Efficient removal of interfering particles is achieved in this way, together, with long service lives and a minimum of emission.

    5.
    发明专利
    未知

    公开(公告)号：NO173593B

    公开(公告)日：1993-09-27

    申请号：NO881110

    申请日：1988-03-11

    Applicant: HOECHST AG

    Inventor： BENNOIT HORST ,  FROELICH WALTER ,  HOELTERMANN ROLF ,  KRUMBOECK REINHARD

    IPC: B01D17/038 ,  B04C5/081 ,  C07C17/156 ,  C07C17/38

    Abstract: A process for the removal of solid particles from a mixture containing at least one liquid chlorinated hydrocarbon is described. The solids-containing liquid mixture is introduced into at least one hydrocyclone having a downstream separator. The liquid mixture which has been enriched in solids and discharged from the hydrocyclone is preferably subjected to sedimentation of the solid particles, without the use of centrifugal forces. Efficient removal of interfering particles is achieved in this way, together, with long service lives and a minimum of emission.

    Process for the removal of lead and cadmium form phosphoric acid
    7.
    发明专利
    Process for the removal of lead and cadmium form phosphoric acid 未知

    公开(公告)号：ZA946065B

    公开(公告)日：1996-02-12

    申请号：ZA946065

    申请日：1994-08-12

    Applicant: HOECHST AG

    Inventor： BENNOIT HORST ,  VERMAIRE DIRK CORNELIS ,  DAMMAN BERNARDUS JOHANNES

    IPC: C01B25/238 ,  C01G

    Abstract: To remove lead and cadmium from phosphoric acid, alkali metal hydroxide solution and aqueous sulphide solution are simultaneously introduced with a thorough mixing into a phosphoric acid having a P2O5 content of up to 32% by weight, an iron content of up to 0.3% by weight and an alkali/P ratio of up to 0.30. The temperature of the phosphoric acid mixed with alkali metal hydroxide solution and sulphide solution is set to temperatures of from 58 to 72 DEG C with the excess hydrogen sulphide being given off. To complete the sulphide precipitation, the temperature is reduced to below 45 DEG C. Finally, the precipitated sulphides of lead and cadmium are separated off from the phosphoric acid.

    8.
    发明专利
    未知

    公开(公告)号：MX171295B

    公开(公告)日：1993-10-18

    申请号：MX1073388

    申请日：1988-03-11

    Applicant: HOECHST AG

    Inventor： KRUMBOCK REINHARD ,  BENNOIT HORST ,  FROHLICH WALTER ,  HOLTERMANN ROLF

    IPC: B01D17/038 ,  B04C5/081 ,  C07C17/156 ,  C07C17/38 ,  B04C5/14 ,  B04C5/28

    Abstract: A process for the removal of solid particles from a mixture containing at least one liquid chlorinated hydrocarbon is described. The solids-containing liquid mixture is introduced into at least one hydrocyclone having a downstream separator. The liquid mixture which has been enriched in solids and discharged from the hydrocyclone is preferably subjected to sedimentation of the solid particles, without the use of centrifugal forces. Efficient removal of interfering particles is achieved in this way, together, with long service lives and a minimum of emission.

    9.
    发明专利
    未知

    公开(公告)号：BR8801119A

    公开(公告)日：1988-10-18

    申请号：BR8801119

    申请日：1988-03-11

    Applicant: HOECHST AG

    Inventor： BENNOIT HORST ,  FROEHLICH WALTER ,  HOELTERMANN ROLF ,  KRUMBOECK REINHARD

    IPC: B01D17/038 ,  B04C5/081 ,  C07C17/156 ,  C07C17/38 ,  B01D21/26 ,  B04C1/00

    Abstract: A process for the removal of solid particles from a mixture containing at least one liquid chlorinated hydrocarbon is described. The solids-containing liquid mixture is introduced into at least one hydrocyclone having a downstream separator. The liquid mixture which has been enriched in solids and discharged from the hydrocyclone is preferably subjected to sedimentation of the solid particles, without the use of centrifugal forces. Efficient removal of interfering particles is achieved in this way, together, with long service lives and a minimum of emission.

    10.
    发明专利
    未知

    公开(公告)号：DE3708010A1

    公开(公告)日：1988-09-22

    申请号：DE3708010

    申请日：1987-03-12

    Applicant: HOECHST AG

    Inventor： BENNOIT HORST ,  FROEHLICH WALTER DR ,  HOELTERMANN ROLF ,  KRUMBOECK REINHARD

    IPC: B01D17/038 ,  B04C5/081 ,  C07C17/156 ,  C07C17/38 ,  B04C5/00 ,  B04C5/14 ,  B04C5/28

    Abstract: A process for the removal of solid particles from a mixture containing at least one liquid chlorinated hydrocarbon is described. The solids-containing liquid mixture is introduced into at least one hydrocyclone having a downstream separator. The liquid mixture which has been enriched in solids and discharged from the hydrocyclone is preferably subjected to sedimentation of the solid particles, without the use of centrifugal forces. Efficient removal of interfering particles is achieved in this way, together, with long service lives and a minimum of emission.

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