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    Improvements in the polymerisation of alpha, beta-unsaturated olefines with two to four carbon atoms
    3.
    发明专利
    Improvements in the polymerisation of alpha, beta-unsaturated olefines with two to four carbon atoms 未知

    公开(公告)号：GB899147A

    公开(公告)日：1962-06-20

    申请号：GB1781560

    申请日：1960-05-20

    Applicant: BASF AG

    Inventor： SPAENIG HERMANN ,  SCHMIDT-THOMEE GEORG

    IPC: C08F10/00

    Abstract: C2 to C4 olefins, e.g. ethylene and propylene, are polymerized with or without an inert solvent and using as catalyst an oxide of Ti, Zr, Hf or Th containing less oxygen than corresponds to the formula MeO2 wherein Me is the metal. Carriers and other metal oxides may be present and specified are active carbon, aluminium oxide, pumice, silicon dioxide, magnesium oxide, calcium oxide, boron oxide, copper oxide, iron oxide and manganese oxide. The catalysts may be obtained by reduction, e.g. TiO2 or titanium phosphate reduced by hydrogen or a metal of Group Ia, IIa or IIIb, or by oxidation, e.g. Ti+TiO2 or MnO, or by a combination of oxidation and reduction, e.g. Ti+ZrO2. Optionally the catalysts may be treated with BF3, SiF4, AlCl3, FeCl2 or ZnCl2. In examples the catalysts used also are ground to a finely divided state; octane and steam are used in the purification of the products. Specifications 823,307, 825,306 and 849,855 are referred to.

    A process for the thermal oxidative degradation and simultaneous purification of linear polyolefines
    9.
    发明专利
    A process for the thermal oxidative degradation and simultaneous purification of linear polyolefines 未知

    公开(公告)号：GB883804A

    公开(公告)日：1961-12-06

    申请号：GB2642660

    申请日：1960-07-29

    Applicant: BASF AG

    Inventor： WISSEROTH KARL ,  HERBECK RUDOLF ,  LAUTENSCHLAGER HANS ,  MOELLER HANS ,  SCHMIDT-THOMEE GEORG ,  STAIGER GERHARD ,  TRIESCHMANN HANS GEORG ,  WEBER HEINZ

    IPC: C08F6/02 ,  C08F8/06 ,  C08F8/50

    Abstract: Linear polyolefines which have been prepared by the polymerization of olefines containing two to four carbon atoms using as catalysts heavy metals of Group IV(a), V(a), or VI(a) of the Mendelleeff Periodic System are simultaneously purified and thermally degraded by dissolving or swelling the polyolefine in an inert organic solvent and heating the solution in the presence of oxygen or oxygen-supplying compounds for 15 to 200 minutes at a temperature between 70 DEG and 240 DEG C. Optionally the heat-treatment may be effected in the presence of 2 to 20% of water and in the presence of such an amount of an alkaline compound that the pH in the aqueous solution after the heat-treatment step is 6 to 7. Substances which have a large internal surface on to which impurities are absorbed may be added to the polymers before, during, or after the heat-treatment. Suitable substances are carbon, aluminium oxide, bleaching earths, and kieselguhr. The linear polymers may be polyethylene, polypropylene, or copolymers of ethylene and/or propylene and/or butene-1. Specified solvents are tetra- or decahydro-naphthalene, cyclohexane, benzene, toluene, xylene, and ethylbenzene. The oxygen-supplying compounds may be peroxides. Alkaline compounds which may be included in the heat-treatment step are ammonia, sodium, potassium, or calcium hydroxide, hydroxylamine or aniline.

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