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    Production of melamine
    1.
    发明授权
    Production of melamine 失效
    生产梅林

    公开(公告)号：US3657236A

    公开(公告)日：1972-04-18

    申请号：US3657236D

    申请日：1969-11-19

    Applicant: BASF AG

    Inventor： FROMM HERMANN DIETER ,  LEONHARD KARL WILHELM ,  MOHR RUDOLF ,  SCHWARZMANN MATTHIAS ,  WOEHRLE HORST

    IPC: B24B9/14 ,  C07D251/60 ,  C07D55/28

    CPC classification number: C07D251/60

    Abstract: TO PRODUCE MELAMINE, UREA AND/OR ITS THERMAL DECOMPOSITION PRODUCTS ARE REACTED AT 220* TO 400*C. IN CONTACT WITH AN ALUMINUM OXIDE HAVING A LARGE SURFACE AREA IN THE PRESENCE OF AMMONIA. THE ALUMINUM OXIDE USED HAS BEEN OBTAINED BY TREATMENT OF HYDROXIDES OF ALUMINUM (WHICH HAVE NOT BEEN PREVIOUSLY CALCINED) WITH UREA AND/OR ITS THERMAL DECOMPOSITION PRODUCTS AT TEMPERATURES OF FROM 150* TO 400*C. THE AVERAGE OF ALUMINUM OXIDE ACTIVATED IN THIS MANNER OVER ALUMINUM OXIDE OBTAINED BY CALCINING ALUMINUM HYDROXIDE CONSIST IN INCREASED UREA CONVERSION AND GREATER ATTRITION RESISTANCE.

    Demulsifying crude oil emulsions
    3.
    发明授权
    Demulsifying crude oil emulsions 失效
    破乳原油乳液

    公开(公告)号：US3907701A

    公开(公告)日：1975-09-23

    申请号：US36714773

    申请日：1973-06-05

    Applicant: BASF AG

    Inventor： LIEBOLD GERT ,  OPPENLAENDER KNUT ,  BUETTNER EGON ,  FIKENTSCHER ROLF ,  MOHR RUDOLF

    IPC: B01D17/04 ,  C08G73/02 ,  C10G33/04

    CPC classification number: C10G33/04 ,  C08G73/024

    Abstract: Rapid dehydration of crude oils containing salt water by addition of minor amounts of polyalkylene polyamines having at least fifty recurring ethylene imine or propylene imine units, the said polyalkylene polyamine being completely alkoxylated at the nitrogen atom with from 10 to 300 moles of ethylene oxide and/or propylene oxide. Using these compounds it is possible to effect dehydration, in an economical manner, of crude oils containing up to relatively large percentages of high molecular weight hydrocarbons.

    Abstract translation: 通过加入少量具有至少五十个重复乙烯亚胺或丙烯亚胺单元的聚亚烷基多胺，使含有盐水的原油快速脱水，所述多亚烷基多胺在氮原子下用10-300摩尔环氧乙烷和/ 或环氧丙烷。 使用这些化合物可以以经济的方式实现含有高达相当大百分比的高分子量烃的原油的脱水。

    Separating ammonia from offgas obtained in the synthesis of melamine
    4.
    发明授权
    Separating ammonia from offgas obtained in the synthesis of melamine 失效
    从合成梅洛胺中获得的废弃物分离氨

    公开(公告)号：US3555784A

    公开(公告)日：1971-01-19

    申请号：US3555784D

    申请日：1968-12-02

    Applicant: BASF AG

    Inventor： MOHR RUDOLF

    IPC: C01B21/12 ,  C01C1/12 ,  B01D19/00

    CPC classification number: C01B21/12 ,  C01C1/12

    Abstract: TO SEPARATE AMMONIA FROM OFFGAS OBTAINED IN THE SYNTHESIS OF MELAMINE FROM UREA, THE OFFGAS, AFTER MELAMINE HAS BEEN SEPARATED, IS TREATED WITH A MELT WHICH CONTAINS AMMONIUM NITRATE AND/OR AMMONIUM THIOCYANATE AND/OR UREA. TEMPERATURES WHICH ARE BETWEEN THE BOILING POINT OF AMMONIA AND THE DECOMPOSITION TEMPERATURE OF AMMONIUM CARBAMATE ARE MAINTAINED IN THE TREATMENT.

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