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    • 76. 发明申请
    • Process for Making Crystalline Metallosilicates
    • 制备结晶金属硅酸盐的方法
    • US20110190561A1
    • 2011-08-04
    • US12994561
    • 2009-02-24
    • Metin BulutPierre JacobsDelphine MinouxNikolai NesternkoJean-Pierre DathSander Van Donk
    • Metin BulutPierre JacobsDelphine MinouxNikolai NesternkoJean-Pierre DathSander Van Donk
    • C07C1/20C01B39/00C01B39/02
    • B01J29/40B01J2229/62C01B37/005C01B39/02C01B39/04C01B39/38C01B39/40C07C2/864C07C2529/70C10G29/205Y02P20/52C07C15/08
    • The present invention relates to a process for making a crystalline metallosilicate composition comprising crystallites having an inner part (the core) and an outer part (the outer layer or shell) such that: the ratio Si/metal is higher in the outer part than in the inner part, the crystallites have a continuous distribution of metal and silicon over the crystalline cross-section, said process comprising: a) providing an aqueous medium comprising OH— anions and a metal source, b) providing an aqueous medium comprising an inorganic source of silicon and optionally a templating agent, c) optionally providing a non aqueous liquid medium comprising optionally an organic source of silica, d) mixing the medium a), b) and the optional c) at conditions effective to crystallyze the desired metallosilicate, e) recovering the desired metallosilicate, wherein in the mixture a)+b)+c), before crystallization, the ratio Si org/Si inorganic is
    • 本发明涉及一种制备结晶金属硅酸盐组合物的方法,其包含具有内部部分(芯部)和外部部分(外层或外壳)的微晶,使得:外部部分的Si /金属比例高于 所述内部部分,所述微晶在结晶截面上具有金属和硅的连续分布,所述方法包括:a)提供包含OH-阴离子和金属源的水性介质,b)提供包含无机源的水性介质 的硅和任选的模板剂,c)任选地提供包含任选的二氧化硅有机源的非水性液体培养基,d)在有效地使所需的金属硅酸盐水解的条件下,将培养基a),b)和任选的c) )回收所需的金属硅酸盐,其中在混合物a)+ b)+ c)中,在结晶之前,Si org / Si无机物的比例<0.3,有利地<0.2,优选为0,摩尔浓度 tio OH- / SiO 2为至少0.3,有利地为0.3至0.62,优选为0.31至0.61,更优选为0.32至0.61,非常优选为0.33至0.6,混合物a)+ b)+ c), 在结晶之前,高于13,优选高于13.1,更优选高于13.2,还更优选高于13.3,最优选高于13.4。
    • 80. 发明授权
    • Production of polyethylene having a bimodal molecular weight distribution
    • 生产具有双峰分子量分布的聚乙烯
    • US6015866A
    • 2000-01-18
    • US996256
    • 1997-12-22
    • Guy DebrasJean-Pierre Dath
    • Guy DebrasJean-Pierre Dath
    • C08F4/02C08F4/24C08F4/69C08F10/02C08F210/16C08F4/06
    • C08F10/02C08F210/16Y02P20/52
    • A process for producing high density polyethylene, the process comprising polymerising ethylene, or copolymerising ethylene and an alpha-olefinic comonomer comprising from 3 to 10 carbon atoms, in the presence of a catalyst system comprising first and second chromium-based catalysts, the first chromium-based catalyst having been reduced and reoxidised and the second chromium-based catalysts having been activated, fluordised before or during the activation step, and reduced, the first and second chromium-based catalysts having a pore volume difference of at least O.8 cc/g. There is further provided a catalyst system for the production of high density polyethylene by polymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising from 3 to 10 carbon atoms, the catalyst system comprising first and second chromium-based catalysts, the first chromium-based catalyst having been reduced and reoxidised and the second chromium-based catalyst having been activated, fluoridised before or after the activation step, and reduced, and the first and second chromium-based catalysts having a pore volume difference of at least 0.8 cc/g. There is further provided the use of the catalyst system for increasing the bimodalty of the molecular weight distribution of a high density polyethylene.
    • 一种生产高密度聚乙烯的方法,该方法包括在包含第一和第二铬基催化剂的催化剂体系存在下聚合乙烯或共聚乙烯和含有3-10个碳原子的α-烯烃共聚单体,第一种铬 的催化剂已经被还原和再氧化,并且第二铬基催化剂已经被活化,在活化步骤之前或期间发黄,并且还原了具有至少O.8cc的孔体积差的第一和第二种铬基催化剂 /G。 还提供了一种用于通过聚合乙烯或共聚乙烯和包含3至10个碳原子的α-烯烃共聚单体生产高密度聚乙烯的催化剂体系,所述催化剂体系包含第一和第二铬基催化剂,第一铬 - 已经还原和再氧化并且第二铬基催化剂已经在活化步骤之前或之后被活化,氟化并还原,并且第一和第二铬孔催化剂的孔体积差异至少为0.8cc / g 。 还提供了用于增加高密度聚乙烯的分子量分布的双峰的催化剂体系的用途。