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    Continuous polycondensation of lactams
    3.
    发明专利
    Continuous polycondensation of lactams 未知

    公开(公告)号：GB1113357A

    公开(公告)日：1968-05-15

    申请号：GB3952465

    申请日：1965-09-16

    Applicant: BASF AG

    Inventor： GUENTHER ERNST ,  LINGE HERMANN ,  NOE KURT ,  PIRZER HANS

    IPC: B01J19/00 ,  B01J19/18 ,  C08G69/16

    Abstract: Lactams having 5-13 ring atoms are continously polymerized at atmospheric pressure in a vertical tube, the top portion of which contains a stirrer, the lactam in a molten state being added to the mixture of lactam and prepolymer at the top of the tube which is at the polymerization temperature. The top quarter of the tube may be 30-80% wider than the remainder and may contain a regulator for the lactam level and a heating coil. The remainder of the tube may contain a heat exchanger and a means for achieving uniform flow in the melt, e.g. a series of gratings. The lactam, e.g. e caprolactam may contain up to 15% water and other additives, e.g. pigments, catalysts, fillers, master batches and stabilizers. The polymerization temperature may be 240-280 DEG C.

    PROCESS AND APPARATUS FOR ACHIEVING A UNIFORM FLOW PROFILE
    6.
    发明专利
    PROCESS AND APPARATUS FOR ACHIEVING A UNIFORM FLOW PROFILE 未知

    公开(公告)号：CA1083012A

    公开(公告)日：1980-08-05

    申请号：CA247615

    申请日：1976-03-10

    Applicant: BASF AG

    Inventor： HOERAUF WERNER ,  PIRZER HANS ,  GUENTHER ERNST ,  NEUMANN ECKART ,  DIETRICH ERNST

    IPC: F15D1/02 ,  F16K47/00

    Abstract: A process and apparatus for achieving a uniform flow profile of very viscous liquids when flowing through a tube or reaction chamber. The very viscous liquid is passed through at least two sets of annular spaces arranged at axial intervals within the tube or reaction chamber, the annular spaces of each set extending concentrically with increasing diameter over the entire cross-section of the tube or reaction chamber and having the same depth in the direction of flow, the annular spaces of two consecutive sets being staggered with respect to each other as viewed in the direction of flow. The apparatus of the invention consists of a combination of two or more discs arranged at axial intervals within a tube transversely to the direction of flow, each disc consisting of a plurality of ring-shaped bands of increasing diameter, the bands being arranged freely of one another and concentrically at intervals on a grid supporting means to provide correspondingly concentric open spaces between the bands over the entire cross-section of the tube, with the walls of the bands running parallel to the direction of flow, and the bands of the separate discs being staggered with respect to each other as viewed in the direction of flow.

    Synthetic lubricants
    7.
    发明专利
    Synthetic lubricants 未知

    公开(公告)号：GB1124469A

    公开(公告)日：1968-08-21

    申请号：GB5451865

    申请日：1965-12-23

    Applicant: BASF AG

    Inventor： BECKE FRIEDRICH ,  PIRZER HANS ,  SANDER BRUNO

    IPC: C09D11/16

    Abstract: A lubricant comprises one or more diesters of one or more cyclohexane carboxylic acids with linear diols said diesters having the general formula where R is H or alkyl and n is 2-10, together with one or more prior art lubricants, and/or additives. Diesters specified are butanediol-1, 4 - di - (methylcyclohexanate), ethylene glycol dicyclohexanate, pentanediol - 1,5 - di - (methylcyclohexanate) and hexanediol - 1,6-di-(methylcyclohexanate).

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