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    Dimerization of olefins
    2.
    发明授权
    Dimerization of olefins 失效

    公开(公告)号：US3622648A

    公开(公告)日：1971-11-23

    申请号：US3622648D

    申请日：1968-05-17

    Applicant: BASF AG

    Inventor： SCHLOEMER KARL ,  KROEPER HUGO ,  WEITZ HANS-MARTIN

    IPC: C07C2/32 ,  C07C3/20

    CPC classification number: C07C2/32 ,  C07C2523/04 ,  C07C2531/22 ,  C07C2531/26

    Abstract: An improved process for the dimerization of olefins in the presence of alkali metal catalysts at 60* to 200* C. and at atmospheric pressure up to 300 atmospheres, catalysts being used which have been derived from an alkali metal and an organic compound containing one or more than one carbonyl group. The process is particularly suitable for effective and selective dimerization of propylene to 4-methylpentene-1. Some of the dimers obtained are suitable as antiknock additives and for the production of polymers.

    METHOD FOR THE SEPARATION BY DISTILLATION OF SMALL QUANTITIES OF MIDDLE BOILING FRACTIONS FROM A LIQUID-MIXTURE
    7.
    发明专利
    METHOD FOR THE SEPARATION BY DISTILLATION OF SMALL QUANTITIES OF MIDDLE BOILING FRACTIONS FROM A LIQUID-MIXTURE 未知

    公开(公告)号：SK30490A3

    公开(公告)日：1998-11-04

    申请号：SK30490

    申请日：1990-01-22

    Applicant: BASF AG

    Inventor： KAIBEL GERD ,  SCHLOEMER KARL ,  MAYER HANS-HORST

    IPC: B01D3/14 ,  C07C7/04 ,  C07C29/80 ,  C07C35/08 ,  C07C35/20 ,  C07C45/82

    Abstract: Process for the separation by distillation of small quantities of a middle-boiling fraction from a liquid mixture by means of a distillation column (main column), comprising a rectification and a stripping component, where the liquid mixture contains relatively large amounts of higher- and lower-boiling constituents, and the rectification component being connected to the upper end and the stripping component to the lower end of a second distillation column (side column), and the middle-boiling fraction being removed in vapour or liquid form from its middle region, the concentration of the middle-boiling fraction in the liquid mixture being less than 2%, preferably less than 0.1%, and the amount of vapour introduced into the side column at its lower end from the main column being 1 to 20%, preferably 3 to 10%, relative to the amount of vapour in the main column at the relevant point.

    Separation of isobutene from gases
    9.
    发明专利
    Separation of isobutene from gases 未知

    公开(公告)号：GB941894A

    公开(公告)日：1963-11-13

    申请号：GB1924161

    申请日：1961-05-29

    Applicant: BASF AG

    Inventor： PLATZ ROLF ,  KROEPER HUGO ,  SCHLOEMER KARL

    IPC: C07C7/17

    Abstract: Isobutene is separated from gases containing it by reaction with a solution comprising a C1-C4 aliphatic carboxylic acid and an inorganic acid or boron trifluoride catalyst and recovering isobutene from the ester formed by adding water and heating. Suitable carboxylic acids are formic, acetic, propionic and butyric containing not more than 5% by weight of water and to which is added 0.1-10% by weight of boron trifluoride, perchloric acid or sulphuric acid. Absorption is effected at 0-40 DEG C. Desorption is achieved by adding 0.3-30% by weight of water to the solution and heating to 80-140 DEG C. In a continuous operation, the gas is supplied through pipe 2 and is contacted with absorption solution from pipe 3 in column 1. The solution flows through column 7 and condenser 8 to vessel 9 where water is added by pipe 11 and the solution is heated. Isobutene is removed by pipe 10 and also flows up through column 7 in counter-current to the solution, thereby stripping out undesired materials. The desorbed solution flows to vessel 14 where an azeotrope, e.g. of propionic acid and water, is distilled off by pipe 15 and used as the source of water for pipe 11 leaving acid which is cooled and recycled to pipe 3.

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