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    • 1. 发明授权
    • Method for producing an ethylene copolymer
    • 乙烯共聚物的制造方法
    • US06586540B1
    • 2003-07-01
    • US09889607
    • 2001-07-19
    • Paulus De LangeVolker BillertBernd BrunnerWerner RitterAndreas Deckers
    • Paulus De LangeVolker BillertBernd BrunnerWerner RitterAndreas Deckers
    • C08F21016
    • C08F210/16C08F2/002C08F210/14C08F2500/12C08F2500/07C08F210/08
    • The invention relates to a method for the production of copolymer based on ethylene by continuous copolymerization of ethylene and comonomer in a reactor in the presence of a catalyst. In this method, in a first step of the copolymerization, a mixture comprising ethylene and comonomer of such a composition that a copolymer-containing coating deposits in the reactor is metered into the reactor and/or generated in the reactor, and, in a second step, the concentration of the comonomer in the metered-in mixture and/or in the mixture generated in the reactor is reduced sufficiently and/or the concentration of the ethylene in the metered-in mixture and/or in the mixture generated in the reactor is increased sufficiently that the coating is removed from the reactor either partially or completely. The method has the advantage that the production of copolymer does not have to be interrupted during cleaning of the reactor.
    • 本发明涉及在反应器中在催化剂存在下通过乙烯和共聚单体的连续共聚制备基于乙烯的共聚物的方法。 在该方法中,在共聚的第一步骤中,将含有共聚物的涂层沉积在反应器中的组合物的乙烯和共聚单体的混合物计量加入反应器和/或在反应器中产生,并且在第二步中 步骤中,在计量混合物中和/或在反应器中产生的混合物中的共聚单体的浓度被充分降低和/或在计量混合物中和/或在反应器中产生的混合物中的乙烯浓度 充分增加,使得涂层部分或完全从反应器中除去。 该方法的优点在于,在反应器的清洗期间不必中断共聚物的制备。
    • 3. 发明授权
    • Optimized method for the production of catalyst supports based on silica gel and chromium catalysts supported on silica gel
    • 基于硅胶和载于硅胶上的铬催化剂生产催化剂载体的优化方法
    • US06645900B2
    • 2003-11-11
    • US10087012
    • 2002-02-28
    • Paulus de LangeGuido FunkAndreas DeckersPeter Kölle
    • Paulus de LangeGuido FunkAndreas DeckersPeter Kölle
    • B01J29035
    • C08F10/00B01J21/08B01J37/0072B01J37/036C08F4/02C08F4/24
    • The invention relates to a catalyst support and to a method for the production of the catalyst support comprising the following steps: a) production of a silicic acid hydrogel having a solids content of from 10 to 25% by weight (calculated as SiO2) whose particles are substantially spherical, b) extraction of the hydrogel particles with an alcohol until at least 60% of the water present in the hydrogel has been removed, c) drying of the resultant hydrogel until the residual alcohol content is less than 10% by weight (xerogel formation) at temperatures of ≧160° C. at atmospheric pressure using an inert entraining gas, d) setting of the desired particle size of the resultant xerogel, in which the hydrogel particles have a particle size of ≧8 mm before the extraction, and to a catalyst and to a method for the production of the catalyst by loading the catalyst support with a chromium compound. The invention also relates to a method for the production of polyolefins using the catalyst.
    • 本发明涉及一种催化剂载体和用于生产催化剂载体的方法,包括以下步骤:a)制备固体含量为10至25重量%(以SiO 2计)的硅酸水凝胶,其颗粒 基本上是球形的,b)用醇萃取水凝胶颗粒,直到水凝胶中存在的至少60%的水已被除去,c)干燥所得的水凝胶,直到残余的醇含量低于10重量% 干燥剂形成),在大气压下使用惰性夹带气体,在大气压力= 160℃的温度下,d)设定所得干燥剂的所需粒度,其中水凝胶颗粒的颗粒尺寸> 萃取和催化剂的制备方法,以及通过用铬化合物负载催化剂载体来生产催化剂的方法。 本发明还涉及使用该催化剂生产聚烯烃的方法。