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    • 2. 发明申请
    • CHROMIUM(III) SILICATE CATALYSTS SUITABLE FOR PE SYNTHESIS
    • (III)适合PE合成的硅酸盐催化剂
    • WO2015007828A1
    • 2015-01-22
    • PCT/EP2014/065348
    • 2014-07-17
    • ETH ZURICH
    • COPÉRET, ChristopheCONLEY, MatthewDELLEY, Murielle
    • C08F4/22C08F4/24C08F10/02C08F4/02
    • C08F110/02C07F13/005C08F10/02C08F2410/03C08F4/22C08F4/24C08F4/025C08F2500/04
    • Molecular precursor chromium compounds and chromium on silica catalyst precursors suitable for use in producing chromium on silica catalysts are disclosed. The molecular precursor compounds can be chromium(II) and/or chromium(III) and/or chromium (IV) compounds wherein all ligands are easily removable, in particular ligands selected from the group consisting of anionic ligands of the type -O-CR 3 R 4 -CH-R 1 R 2 or -O-Si-(O- CR 3 R 4 -CH-R 1 R 2 ) 3 wherein R1, R2, R3 and R4 may be the same or different and may be any group that does not affect decomposition of the ligand via elimination of beta-hydrogen from -CR 3 R 4 -CH-R 1 R 2 , amide anionic ligands of the type -N-Si-R 5 R 6 R 7 and/or -N-C-R 5 R 6 R 7 , wherein R 5 , R 6 and R 7 can be the same or different and are preferably selected from hydrogen, methyl groups, ethyl groups, n-propyl groups, iso-propyl groups, tert-butyl groups or aromatic groups; as well as coordinating solvents. These molecular precursors can be grafted to silica and - if need be - either before or after heat treatment during which the ligands are removed, oxidized to Cr(III). The chromium on silica catalyst is characterized by the absence of any organic ligands.
    • 公开了分子前体铬化合物和适用于在二氧化硅催化剂上生产铬的二氧化硅催化剂前体上的铬。 分子前体化合物可以是其中所有配体易于除去的铬(II)和/或铬(III)和/或铬(IV)化合物,特别是选自-O-CR 3 R 4型阴离子配体的配体 -CH-R 1 R 2或-O-Si-(O-CR 3 R 4 -CH-R 1 R 2)3,其中R 1,R 2,R 3和R 4可以相同或不同,并且可以是不影响配体通过消除 来自-CR 3 R 4 -CH-R 1 R 2的β-氢,-N-Si-R 5 R 6 R 7和/或-NC-R 5 R 6 R 7的酰胺阴离子配位体,其中R 5,R 6和R 7可以相同或不同,优选选自氢, 甲基,乙基,正丙基,异丙基,叔丁基或芳基; 以及配位溶剂。 这些分子前体可以接枝到二氧化硅上,如果需要,在热处理之前或之后,将配体除去,氧化成Cr(III)。 二氧化硅催化剂上的铬的特征在于不存在任何有机配体。
    • 5. 发明申请
    • METHOD FOR OPTIMISING THE SUPPLY OF CATALYST SLURRY TO A POLYMERIZATION REACTOR
    • 优化催化剂浆料供应给聚合反应器的方法
    • WO2010057925A1
    • 2010-05-27
    • PCT/EP2009/065399
    • 2009-11-18
    • TOTAL PETROCHEMICALS RESEARCH FELUYTANGHE, Rudi
    • TANGHE, Rudi
    • C08F10/00C08F2/14C08F2/01C08F4/24
    • C08F10/00B01J8/002B01J8/0035B01J8/20B01J2208/00628B01J2208/00663B01J2208/00752B01J2208/00769C08F10/02C08F2400/02C08F2/00C08F4/24C08F2/01
    • The present invention relates to a method for optimizing the supply of a catalyst slurry during a polymerization process for preparing a polyolefin in a polymerization reactor (1), whereby said slurry consists of solid catalyst particles suspended in a hydrocarbon diluent and is characterised by a ratio of solid catalyst particles/diluent, whereby the catalyst slurry is fed to the reactor through at least two parallel catalyst feeding conduits (4, 104) which are intermittently operative in the polymerisation process, said method comprising the steps of : - determining an effective initial ratio solid catalyst particles/diluent for the polymerization process; - determining the actual ratio solid catalyst particles/diluent in a first operative feeding conduit (4); - calculating the difference between actual and initial ratio and in the event that said difference is more than a specified threshold, shutting down the first catalyst feeding conduit (4) and activating a second catalyst feeding conduit (104). The catalyst slurry is periodically supplied to the reactor. The invention also relates to polyolefin production processes and polyolefin producing units.
    • 本发明涉及在聚合反应器(1)中制备聚烯烃聚合过程中优化催化剂浆料供应的方法,其中所述浆料由悬浮在烃类稀释剂中的固体催化剂颗粒组成,其特征在于比例 的固体催化剂颗粒/稀释剂,由此催化剂浆料通过在聚合过程中间歇地操作的至少两个平行的催化剂进料导管(4,104)进料到反应器中,所述方法包括以下步骤: - 确定有效的初始 比固体催化剂颗粒/稀释剂用于聚合过程; - 确定第一操作进料管道(4)中固体催化剂颗粒/稀释剂的实际比例; - 计算实际和初始比率之间的差异,以及在所述差异大于指定阈值的情况下,关闭第一催化剂进料管道(4)并激活第二催化剂供给管道(104)。 催化剂浆料周期性地供应到反应器中。 本发明还涉及聚烯烃生产方法和聚烯烃生产单元。