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    • 1. 发明公开
    • 크롬-기재 촉매
    • 基于铬的催化剂
    • KR1020080112295A
    • 2008-12-24
    • KR1020087025005
    • 2007-04-13
    • 토탈 리서치 앤드 테크놀로지 펠루이
    • 보다필리쁘데브라기담스미에케
    • C08F4/22C08F4/646C08F10/02C08F4/16
    • C08F10/00C08F210/16Y02P20/52C08F4/24C08F4/76C08F4/025C08F210/14C08F2500/12C08F2500/19C08F2500/07C08F2500/04C08F2500/13
    • The present invention provides a process for preparing a supported chromium-based catalyst for the production of polyethylene comprising the steps of a) providing a silica-based support having a specific surface area of at least 250 m2/g and of less than 400 m2/g and comprising a chromium compound deposited thereon, the ratio of the specific surface area of the support to chromium content being at least 50000 m2/g Cr; b) dehydrating the product of step a); and c) titanating the product of step b) in an atmosphere of dry and inert gas containing at least one vaporised titanium compound of the general formula selected from RnTi(OR')m and (RO)nTi(OR')m, wherein R and R' are the same or different hydrocarbyl groups containing from 1 to 12 carbon atoms, and wherein n is 0 to 3, m is 1 to 4 and m+n equals 4, to form a titanated chromium-based catalyst having a ratio of specific surface area of the support to titanium content of the titanated catalyst ranging from 5000 to 20000 m2/g Ti. ® KIPO & WIPO 2009
    • 本发明提供一种制备用于生产聚乙烯的负载型铬基催化剂的方法,包括以下步骤:a)提供比表面积至少为250m 2 / g且小于400m 2 / g的二氧化硅基载体, g并且包含沉积在其上的铬化合物,载体的比表面积与铬含量的比率为至少50000m 2 / g Cr; b)使步骤a)的产物脱水; 和c)在含有至少一种选自RnTi(OR')m和(RO)n Ti(OR')m的通式的蒸发的钛化合物的干燥和惰性气体的气氛中对步骤b)的产物进行钛酸化,其中R 和R'是含有1至12个碳原子的相同或不同的烃基,并且其中n为0至3,m为1至4,m + n等于4,以形成钛酸根化合物的比例为 载体的比表面积为钛酸根催化剂的钛含量为5000〜20000m2 / g Ti。 ®KIPO&WIPO 2009
    • 2. 发明公开
    • 분지형 저 및 중밀도 폴리에틸렌
    • 分散低密度聚乙烯和中密度聚乙烯
    • KR1020080108265A
    • 2008-12-12
    • KR1020087024036
    • 2007-04-13
    • 토탈 리서치 앤드 테크놀로지 펠루이
    • 미쉘자끄데브라기보다필리쁘담스미에케샬리에파스깔
    • C08F10/02C08F4/22C08F4/16C08J5/18
    • C08F210/16C08F10/02C08F4/24C08F210/14C08F2500/12C08F2500/04C08F2500/09C08F2500/19
    • The invention relates to a long chain branched medium and low density polyethylene having a combination of the following properties: a) a density of from 0.910 to 0.945 g/cm3; b) an HLMI of from 2 to 150 dg/min and an Ml2 of from 0.01 to 2 dg/min; c) a polydispersity index (PDI) Mw/Mn of at least 7, wherein Mw is the weight average molecular weight and Mn is the number average molecular weight of the polyethylene; and d) and a minimum amount of long chain branching measured by a value selected from one of grheo and LCBI. The invention also relates to a process for obtaining said polyethylene comprising the following steps: a) injecting ethylene, one or more alpha-olefinic comonomers comprising 3 to 10 carbon atoms and an activated chromium-based catalyst into a gas phase polymerisation reactor; b) copolymerising said ethylene and comonomer in said reactor in the gas phase; and c) retrieving an ethylene copolymer having a density of from 0.910 to 0.945 g/cm3 from said reactor; said activated catalyst having a chromium concentration of at least 0.1 wt-% and of at most 1.0 wt-% based on the weight of the titanated chromium-based catalyst and a titanium concentration of from 1 wt-% to 5 wt-% based on the weight of the titanated chromium-based catalyst, whereby the catalyst was titanated with vaporised titanium compound and activated at a temperature of at least 500‹C. ® KIPO & WIPO 2009
    • 本发明涉及具有以下特性的组合的长链支化介质和低密度聚乙烯:a)0.910至0.945g / cm 3的密度; b)HLMI为2至150dg / min,M12为0.01至2dg / min; c)多分散指数(PDI)Mw / Mn至少为7,其中Mw是重均分子量,Mn是聚乙烯的数均分子量; 和d)和通过选自格莱和LCBI之一的值测量的最小量的长链分支。 本发明还涉及一种获得所述聚乙烯的方法,包括以下步骤:a)将乙烯,一种或多种含有3至10个碳原子的α-烯烃共聚单体和活化的铬基催化剂注入气相聚合反应器中; b)在气相中在所述反应器中共聚所述乙烯和共聚单体; 和c)从所述反应器中回收密度为0.910至0.945g / cm 3的乙烯共聚物; 所述活化催化剂的铬浓度基于钛酸化铬基催化剂的重量为至少0.1重量%至多1.0重量%,钛浓度为1重量%至5重量%,基于 钛酸铬催化剂的重量,由此催化剂用蒸发的钛化合物钛化,并在至少500℃的温度下活化。 ®KIPO&WIPO 2009
    • 3. 发明公开
    • 중합 방법에서 정전기 전하의 감소
    • 降低聚合过程中的静电电荷
    • KR1020080112296A
    • 2008-12-24
    • KR1020087025006
    • 2007-04-13
    • 토탈 리서치 앤드 테크놀로지 펠루이
    • 보다필리쁘데브라기담스미에케부뀌오요위야흐야
    • C08F4/22C08F10/02C08F2/00
    • C08F10/02C08F10/00C08F210/16C08F4/76C08F2/002C08F4/22C08F210/14C08F2500/12
    • The present invention relates to a method for polymerising ethylene, or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, comprising the steps of injecting an activated catalyst into a gas-phase polymerisation reactor, injecting ethylene and any optional alpha-olefinic comonomer into said reactor, allowing said ethylene and any optional comonomer to (co)polymerise and recovering a polyethylene powder, wherein the activated catalyst is manufactured by a process comprising the steps of a) providing a support with a chromium compound deposited thereon, b) dehydrating the product of step a), c) titanating the product of step b) in an atmosphere of dry and inert gas containing at least one vaporised titanium alkoxide compound, and d) activating the product of step c) at a temperature of at least 500‹C. The invention also relates to the use of a chromium-based catalyst in a gas-phase polymerisation of ethylene. ® KIPO & WIPO 2009
    • 本发明涉及聚合乙烯或共聚乙烯和含有3至10个碳原子的α-烯烃共聚单体的方法,包括将活化的催化剂注入气相聚合反应器中,注入乙烯和任何任选的α-烯烃共聚单体, 烯烃共聚单体进入所述反应器,允许所述乙烯和任何任选的共聚单体(共)聚合并回收聚乙烯粉末,其中活化催化剂通过包括以下步骤的方法制备:a)提供其上沉积有铬化合物的载体,b )使步骤a)的产物脱水,c)将步骤b)的产物在包含至少一种蒸发的钛醇盐化合物的干燥和惰性气体的气氛中进行钛酸化,和d)在步骤c)的温度下活化步骤c)的产物 至少500