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    Improvements in the continuous production of phthalodinitriles
    91.
    发明专利
    Improvements in the continuous production of phthalodinitriles 未知

    公开(公告)号：GB827355A

    公开(公告)日：1960-02-03

    申请号：GB1317558

    申请日：1958-04-25

    Applicant: BASF AG

    Inventor： KROEPER HUGO ,  FUCHS WERNER ,  PLATZ ROLF

    IPC: C07C255/51

    Abstract: The invention comprises a process for the continuous production of a phthalodinitrile, wherein a solid phthalic acid is fluidized by means of an inert gas current, with a dehydration catalyst, having a grain size of 0.1-1.0 mm. diameter, and the resultant fluidizable mixture is then conveyed by means of ammonia into a reaction zone, in which it is reacted at 250-500 DEG C. in a fluidized layer. Any of the isomeric phthalic acids may be used as starting materials. Examples of catalysts which may be used are aluminium oxide, boron phosphate, aluminium phosphate, silica gel, molybdic acid, titanium dioxide, mixtures thereof, or a silica gel impregnated with phosphoric acid. The ratio of the initial material to the catalyst is preferably 1 : 20 to 1 : 3. This mixture is fluidized by means of an inert gas stream in a preliminary vessel. Air or nitrogen may be used as the inert gas. The mixing vessel is preferably kept between room temperature and the melting-point of the initial material, e.g. 50-150 DEG C., and the fluidization may be carried out at normal or increased, e.g. 1-2 atmospheres, pressure. The fluidizable and flowable mixture obtained is then conveyed by a stream of ammonia into the actual reaction zone in such a way that the amount of catalyst in the reaction zone remains constant. The mol. ratio of initial material to ammonia during the reaction in the fluidized layer may be 1 : 3 to 1 : 20. Ammonia may also be additionally introduced directly into the fluidized layer. It is preferable to withdraw a part of the catalyst continuously from the reaction chamber and return it into the mixing vessel, where the substance to be reacted is mixed therewith by fluidization with an inert gas stream. A circulatory system for the unreacted ammonia is also preferably present. The end products are obtained, for example, by cooling from the gases leaving the reaction chamber. Examples are given of the preparation of terephthalonitrile and isophthalonitrile.

    PREPARATION OF AROMATIC URETHANES
    93.
    发明专利
    PREPARATION OF AROMATIC URETHANES 未知

    公开(公告)号：CA1150292A

    公开(公告)日：1983-07-19

    申请号：CA346047

    申请日：1980-02-20

    Applicant: BASF AG

    Inventor： MERGER FRANZ ,  PLATZ ROLF ,  TOWAE FRIEDRICH

    IPC: B01J23/38 ,  C07C271/06 ,  C07C125/065

    Abstract: Aromatic urethanes are prepared by reacting aromatic amines with hydroxy compounds, carbon monoxide and oxygen or nitro compounds at elevated temperatures and superatmospheric pressure, using special selenium or sulfur catalysts. The aromatic urethanes obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents, drugs and polyurethanes.

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