中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.019 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE3784148D1

    公开(公告)日：1993-03-25

    申请号：DE3784148

    申请日：1987-11-25

    Applicant: BASF AG

    Inventor： GRUBER WOLFGANG DR ,  SCHWEIER GUENTHER DR ,  SCHOENE WERNER DR ,  SCHNEIDER PAUL ,  KUCHNER KARL DR ,  HUBER KARL

    IPC: C08F2/34 ,  C08F4/00 ,  C08F4/60 ,  C08F4/64 ,  C08F210/16

    Abstract: Continuous prodn. of random copolymers (I) of propene with other monoalkenes is carried out in the qas phase in the presence of a Ziegler-Natta catalyst system at 50-80 deg.C and 20-35 bar in a centric stirred bed of small polymer particles with a Froude No. of 1-3, in which the heat of polymerisation is removed by evaporative cooling. The monomer mixt. is supplied and (I) is discharged from the polymerisation zone continuously or cyclically. The process is carried out under conditions such that: (a) the polymerisation zone is kept in a pressure and temp. range at which the monomer mixt. is gaseous; (b) the unpolymerised monomer mixt. is discharged as gas, liquefied, stored and recycled to the polymerisation zone in liq. form; (c) the temp. in the polymerisa-tion zone is controlled by monitoring the temp. continuously and varying the amt. of liq. monomer mixt. introduced in unit time, which vaporises in the reactor; and (d) replacing the polymerised monomers by supplying fresh monomers. The novelty is that the monomer mixt. used contains 0.5-3.5 mole-% ethylene and 0.2-1.0 mole-%. H2 w.r.t. propene nand the dwell time of the monomer mixt. in the polymerisation zone is 0.5-8 min.

    Production of propylene polymers by polymerization of propylene using ziegler catalysts
    7.
    发明专利
    Production of propylene polymers by polymerization of propylene using ziegler catalysts 未知

    公开(公告)号：GB1079544A

    公开(公告)日：1967-08-16

    申请号：GB4805064

    申请日：1964-11-26

    Applicant: BASF AG

    Inventor： WEBER HEINZ ,  SCHNEIDER PAUL ,  WINDERL SIEGFRIED ,  FLICKINGER ERICH

    IPC: C08F10/06

    Abstract: Propylene polymers are produced by homopolymerization or copolymerization of propylene using a catalyst composed of an organometallic compound or metal hydride and a compound of a transition metal of Groups IV to VI of the Mendeleef Periodic System at a temperature of from - 20 DEG to + 160 DEG C. and a pressure of from atmospheric pressure to 25 atmospheres wherein the polymerization is carried out in the presence of an ethylenically unsaturated halogen compound which is a substituted alkene containing three or four carbon atoms and at least two chlorine and/or bromine atoms and having a terminal double bond, one of the halogen atoms being bound in the 1- or 2-position and another halogen atom being bound in the 3 position of the substituted alkene. Polymers produced are polypropylene, copolymers of ethylene/propylene, propylene/butene-1, and a terpolymer of ethylene / propylene / dicyclopentadiene. Unsaturated halogen compounds exemplified are 2,3 - dichloropropene - 1, 1,2 - dibromo - 3 - chlorobutene - 1 and 1,2,3 - trichloropropene-1. Also specified are 2-chloro-3,4-dibromobutene-1 and 1,2,3 - trichlorobutene - 1. Catalysts exemplified are 3TiCl3.AlCl3 with diethyl aluminium chloride, triisobutyl aluminium, butyl lithium or lithium aluminium hydride, and VOCl3 with diethyl aluminium chloride or methyl aluminium sesquichloride. Polymerization is effected in organic solvents such as petroleum ether alone or mixed with trichloroethylene, and cyclohexane. In one example, propylene is polymerized first with lithium aluminium hydride and then 3TiCl3.AlCl3 is added and the polymerization is completed. The unsaturated halogen compound acts as a molecular weight regulator. Conventional co-catalysts for increasing the stereospecificity of the catalyst may be co-employed. In a comparative example, 2-methyl-4-chlorobutene-2 is used as a regulator.

    MANUFACTURE OF A MODIFIED TITANIUM COMPONENT FOR CATALYSTS OF THE ZIEGLER-NATTA TYPE
    10.
    发明专利
    MANUFACTURE OF A MODIFIED TITANIUM COMPONENT FOR CATALYSTS OF THE ZIEGLER-NATTA TYPE 未知

    公开(公告)号：CA1055469A

    公开(公告)日：1979-05-29

    申请号：CA233667

    申请日：1975-08-18

    Applicant: BASF AG

    Inventor： SCHNEIDER PAUL ,  SCHICK HANS ,  MUELLER-TAMM HEINZ ,  HENNENBERGER PETER

    IPC: C08F4/00 ,  C01G23/02 ,  C08F4/60 ,  C08F4/647 ,  C08F4/76 ,  C08F10/00 ,  C08F4/16

    Abstract: A process for the manufacture of a modified titanium-contain-ing component or a catalyst for the polymerization of .alpha.-mono-olefins by the Ziegler-Natta method wherein (a) a compound containing titanium and (b) a compound containing phosphorus are ground dry in a vibratory ball mill. It is characterisrtic of the process that (1) a mill Or relatively large useful volume is employed, (2) the mill is first charged with the compound (a) containing titanium, (3) wilst grinding the material at a low temperature, the compound (b) containing phosphorus is added gradually, thereafter (4) the materials is gradually brought to a higher temperature, whilst continuing the grinding, and is kept at about this temperature for a prolonged period, then (5) a finely particulate 1-alkene polymer having a particular glass transition temperature and a particular intrinsic viscostiy is added to the material and finally (6) the material is kept at a low temperature for a prolonged period, whilst continuing the grinding.

Patent Agency Ranking