-
公开(公告)号：US5610244A
公开(公告)日：1997-03-11
申请号：US537708
申请日：1995-12-08
申请人： Gabriele Govoni , Roberto Rinaldi , Giuseppe Penzo
发明人： Gabriele Govoni , Roberto Rinaldi , Giuseppe Penzo
CPC分类号： C08F10/00 , B01J8/0015 , B01J8/26 , Y10S526/901
摘要： A process for polymerizing olefins using a fluidized bed, in which the monomer entry point is located at a point above the bed height. A pre-polymerization step can be conducted using a Z/N catalyst along with an alkane diluent, and resultant liquid phase is introduced into the fluidized bed above the bed height. The process may use several reactors in series arrangement.
摘要翻译： PCT No.PCT / EP95 / 00544 Sec。 371 1995年12月8日第 102（e）日期1995年12月8日PCT提交1995年2月15日PCT公布。 出版物WO95 / 22565 日期1995年8月24日使用流化床聚合烯烃的方法，其中单体入口点位于床高度上方。 可以使用Z / N催化剂和烷烃稀释剂进行预聚合步骤，并将所得液相引入床高度上方的流化床。 该方法可以使用几个串联的反应器。
-
公开(公告)号：US4316009A
公开(公告)日：1982-02-16
申请号：US117787
申请日：1980-02-01
CPC分类号： C08G64/406
摘要： Organic-solvent solutions of polycarbonates containing impurities, e.g., sodium chloride and sodium carbonate formed during the preparation of the polycarbonates, and/or catalysts, are purified by sending aqueous emulsions of polycarbonates in water-immiscible organic solvents, in particular the aqueous emulsions coming from the various purification phases of the organic polycarbonate solutions obtained in the synthesis, through a layer of fibers in which the dispersed droplets of the emulsion coalesce, with the formation of two layers each consisting essentially of one of the two separate phases of the emulsion.
摘要翻译： 含有杂质的聚碳酸酯的有机溶剂溶液，例如在制备聚碳酸酯期间形成的氯化钠和碳酸钠和/或催化剂，通过将聚碳酸酯的水性乳液送到与水不混溶的有机溶剂中，特别是水乳液来进行纯化 通过合成中获得的有机聚碳酸酯溶液的各种净化阶段，通过其中分散的乳液聚集的纤维层，形成两层，每层基本上由乳液的两个分离相中的一个组成。
-
公开(公告)号：US5698642A
公开(公告)日：1997-12-16
申请号：US684411
申请日：1996-07-19
申请人： Gabriele Govoni , Roberto Rinaldi , Massimo Covezzi , Paolo Galli
发明人： Gabriele Govoni , Roberto Rinaldi , Massimo Covezzi , Paolo Galli
IPC分类号： B01J8/18 , B01J8/38 , B01J19/24 , C08F2/00 , C08F2/34 , C08F10/00 , C08F110/06 , C08F210/16
CPC分类号： C08F10/00 , B01J19/2435 , B01J8/1863 , B01J8/388 , C08F110/06 , C08F210/16 , Y10S526/901
摘要： Process for gas-phase polymerization carried out in two interconnected polymerization zones, to which one or more .alpha.-olefins CH.sub.2 .dbd.CHR are fed in the presence of catalyst under reaction conditions and from which the polymer product is discharged. The process is characterized in that the growing polymer flows through a first polymerization zone under fast fluidization conditions, leaves said first zone and enters a second polymerization zone through which it flows in a densified form under the action of gravity, leaves said second zone and is reintroduced into the first polymerization zone, thus establishing a circulation of polymer around the two polymerization zones. The novel process allows olefins to be polymerized in the gas phase with high productivity per unit volume of the reactor without incurring the problems of the fluidized-bed technologies of the known state of the art.
摘要翻译： 在两个相互连接的聚合区中进行气相聚合的方法，在催化剂存在下，在反应条件下将一种或多种α-烯烃CH 2 = CHR加入其中，聚合物产物从其中排出。 该方法的特征在于，生长的聚合物在快速流化条件下流过第一聚合区，离开所述第一区并进入第二聚合区，通过该第二聚合区，其在重力作用下以致密化形式流动，离开所述第二区，并且是 重新引入第一聚合区，从而建立聚合物周围两个聚合区的循环。 该新方法允许烯烃在气相中以每单位体积的反应器的高生产率聚合，而不会引起现有技术的流化床技术的问题。
-
公开(公告)号：US06228956B1
公开(公告)日：2001-05-08
申请号：US08476063
申请日：1995-06-07
申请人： Massimo Covezzi , Paolo Galli , Gabriele Govoni , Roberto Rinaldi
发明人： Massimo Covezzi , Paolo Galli , Gabriele Govoni , Roberto Rinaldi
IPC分类号： C08F444
CPC分类号： C08F10/00 , C08F210/16 , C08F4/6492 , C08F2/001
摘要： Process for the gas-phase polymerization of olefins of the formula CH2═CHR where R is hydrogen or an alkyl or aryl radical with 1 to 8 carbon atoms carried out in one or more reactors having a fluidized or mechanically agitated bed, using a catalyst obtained by reaction of a titanium halide or haloalcoholate and optionally an electron-donor compound supported on an active Mg-dihalide with an Al-trialkyl compound and optionally an electron-donor compound, comprising the steps of: a) contacting the catalyst components in the absence of polymerizable olefin or optionally in the presence of said olefin in an amount to from up to 3 g per g of solid catalyst component; b) prepolymerizing propylene or mixtures of propylene with ethylene or an alpha-olefin to form a propylene polymer having an insolubility in xylene of at least 60% by weight, in an amount of from 5 g of polymer per g of solid catalyst component to 10% by weight of the final catalyst yield; and c) polymerizing one or more CH2═CHR olefins in the gas phase in the presence of the prepolymer-catalyst system obtained in b), while maintaining in the gas phase an alkane in a molar concentration with respect to the total gases of from 20 to 90%.
摘要翻译： 式CH 2 = CHR的烯烃的气相聚合方法，其中R是氢或具有1至8个碳原子的烷基或芳基，在具有流化床或机械搅拌床的一个或多个反应器中进行，使用获得的催化剂 通过卤化钛或卤代醇化物和任选的负载在活性二卤化镁上的电子给体化合物与Al-三烷基化合物和任选的电子给体化合物的反应，包括以下步骤：a）在不存在的情况下使催化剂组分接触 的可聚合烯烃或任选地在所述烯烃存在下的量为每克固体催化剂组分高达3克; b）将丙烯或丙烯与乙烯或α-烯烃的混合物预聚合以形成具有不溶性的丙烯聚合物 在二甲苯中至少60重量％，每克固体催化剂组分为5克聚合物至最终催化剂产率的10重量％; 在气相中，在b）中得到的预聚物 - 催化剂体系存在下，在气相中聚合一种或多种CH 2 = CHR烯烃，同时在气相中保持相对于总气体的摩尔浓度为20〜 90％。
-
公开(公告)号：US5733987A
公开(公告)日：1998-03-31
申请号：US30654
申请日：1993-03-12
申请人： Massimo Covezzi , Paolo Galli , Gabriele Govoni , Roberto Rinaldi
发明人： Massimo Covezzi , Paolo Galli , Gabriele Govoni , Roberto Rinaldi
CPC分类号： C08F10/02 , Y10S526/901
摘要： Process for the gas-phase polymerization of ethylene and ethylene mixtures with .alpha.-olefins CH.sub.2 .dbd.CHR in the presence of a high activity catalyst comprising a titanium compound containing at least one Ti-halogen bond, supported on magnesium dichloride in active form said process comprising the steps of: (a) contacting the catalyst component; (b) prepolymerizing ethylene or ethylene mixtures with .alpha.-olefins in order to produce a polymer amount of from approximately 5 g per g of solid component, up to an amount corresponding to about 10% of the final catalyst yield; (c) polymerizing ethylene or ethylene mixtures with .alpha.-olefins in the gas-phase, in the presence of the prepolymer-catalyst system obtained in (b), while maintaining in the gas phase a molar concentration concentration of the alkane comprised between 20 and 90% with respect to the total gases.
摘要翻译： 在含活性形式负载在二氯化镁上的含有至少一个Ti-卤键的钛化合物的高活性催化剂存在下，用α-烯烃CH 2 = CHR气相聚合乙烯和乙烯混合物的方法，所述方法包括 步骤：（a）使催化剂组分接触; （b）将乙烯或乙烯混合物与α-烯烃预聚合，以产生约5g / g固体组分的聚合物量，至多相当于最终催化剂产率的约10％的量; （c）在（b）中获得的预聚物 - 催化剂体系的存在下，在气相中与α-烯烃聚合乙烯或乙烯混合物，同时在气相中保持烷烃的摩尔浓度浓度在20和 相对于总气体为90％。
-
公开(公告)号：US4332933A
公开(公告)日：1982-06-01
申请号：US165017
申请日：1980-07-01
CPC分类号： C08F6/02
摘要： The halogen and organic substances content of the catalyst residues in alpha-olefin crystalline (co)-polymers prepared with catalysts obtained by reacting:(a) a metallorganic Al compound with(b) a Ti compound supported on a Mg halide, in which an electron-donor is combined with the Ti compound and/or the Mg compound and optionally with (a),are reduced by passing a stream of superheated steam (optionally mixed with other gaseous fluids) over the polymer in powder form at a temperature of 105.degree.-140.degree. C. and under a pressure of 0.1-10 kg/cm.sup.2 gauge, the steam/polymer ratio being comprised between 0.10 and 1 by weight.
摘要翻译： 通过使（a）金属有机Al化合物与（b）负载在卤化镁上的Ti化合物反应获得的催化剂制备的α-烯烃结晶（共）聚合物中的催化剂残余物的卤素和有机物质含量，其中 电子给体与Ti化合物和/或Mg化合物任选地与（a）组合，通过使过热蒸汽（任选地与其它气态流体混合）在粉末形式的聚合物上在105℃的温度下被还原 在-1.0〜10kg / cm2的压力下，蒸汽/聚合物的比例在0.10-1重量份之间。
-
公开(公告)号：US06413477B1
公开(公告)日：2002-07-02
申请号：US08943748
申请日：1997-10-03
申请人： Gabriele Govoni , Roberto Rinaldi , Massimo Covezzi , Paolo Galli
发明人： Gabriele Govoni , Roberto Rinaldi , Massimo Covezzi , Paolo Galli
IPC分类号： B01J808
CPC分类号： C08F10/00 , B01J8/1863 , B01J8/388 , B01J19/2435 , C08F110/06 , C08F210/16 , Y10S526/901 , C08F2/001 , C08F2/34 , C08F2500/18 , C08F210/14 , C08F2500/12 , C08F2500/08
摘要： Process for gas-phase polymerization carried out in two interconnected polymerization zones, to which one or more &agr;-olefins CH2═CHR are fed in the presence of catalyst under reaction conditions and from which the polymer product is discharged. The process is characterized in that the growing polymer flows through a first polymerization zone under fast fluidization conditions, leaves said first zone and enters a second polymerization zone through which it flows in a densified form under the action of gravity, leaves said second zone and is reintroduced into the first polymerization zone, thus establishing a circulation of polymer around the two polymerization zones. The novel process allows olefins to be polymerized in the gas phase with high productivity per unit volume of the reactor without incurring the problems of the fluidized-bed technologies of the known state of the art.
摘要翻译： 在两个相互连接的聚合区中进行气相聚合的方法，一个或多个α-烯烃CH 2 = CHR在催化剂存在下在反应条件下进料，聚合物产物从其中排出。 该方法的特征在于，生长的聚合物在快速流化条件下流过第一聚合区，离开所述第一区并进入第二聚合区，通过该第二聚合区，其在重力作用下以致密化形式流动，离开所述第二区，并且是 重新引入第一聚合区，从而建立聚合物周围两个聚合区的循环。 该新方法允许烯烃在气相中以每单位体积的反应器的高生产率聚合，而不会引起现有技术的流化床技术的问题。
-
公开(公告)号：US5728353A
公开(公告)日：1998-03-17
申请号：US711133
申请日：1996-09-09
IPC分类号： B01J8/24 , B01J8/08 , B01J8/26 , C08F2/00 , C08F2/14 , C08F2/34 , C08F2/38 , C08F4/60 , C08F4/654 , C08F10/00 , C08F10/02 , F27B15/08
CPC分类号： C08F10/00 , B01J8/26 , Y10S526/904
摘要： Gas-phase process for the preparation of polymers and copolymers of olefins CH.sub.2 .dbd.CHR, carried out in at least 2 fluidized or mechanically agitated bed gas-phase reactors operating under different reaction conditions so as to obtain different polymers in the different reactors; the process is characterized in that the polymer is at least partially recycled among the different reactors by using ratios of the flow rate of circulation among the different reactors to the discharge flow rate comprised between 2 and 6.
摘要翻译： 用于制备烯烃CH2 = CHR的聚合物和共聚物的气相方法，在不同反应条件下运行的至少2个流化床或机械搅拌床气相反应器中进行，以便在不同反应器中获得不同的聚合物; 该方法的特征在于，通过使用不同反应器之间的循环流量与包含在2和6之间的排出流速的比率，聚合物在不同的反应器中至少部分地再循环。
-
9.发明授权Process for the production of heterophasic polymer compositions, and compositions thus obtained 失效用于生产多相聚合物组合物的方法和由此获得的组合物公开(公告)号：US06355731B1
公开(公告)日：2002-03-12
申请号：US09509659
申请日：2000-03-30
申请人： Gabriele Govoni , Massimo Covezzi , Jean News
发明人： Gabriele Govoni , Massimo Covezzi , Jean News
IPC分类号： C08F29708
CPC分类号： C08F297/083 , C08F4/65912 , C08F10/00 , C08F10/06 , C08F210/06 , C08F297/08 , C08L23/0815 , C08L23/14 , C08L2207/02 , C08L2308/00 , C08F4/65927 , C08F2/001 , C08F2/42 , C08L2666/04 , C08F210/16 , C08F2500/12 , C08F2500/17
摘要： A process for the preparation of heterophasic polyolefin compositions by (i) polymerizing to form (a) a crystalline propylene or ethylene polymer, and (b) an elastomeric copolymer of ethylene and a C3-C10 &agr;-olefin, wherein the polymerizations are carried out in the presence of a Ziegler-Natta catalyst, (ii) contacting the polymer obtained in (i) with: (a) a compound capable of deactivating the catalyst present in (i), and (b) a catalyst (2) obtained by contacting (I) a compound containing a transition metal M, and at least one ligand coordinated with the metal M by a &pgr; bond, and (II) a cocatalyst, and (iii) copolymerizing ethylene and a C3-C10 &agr;-olefin in the presence of the polymer treated as in (ii), and the catalyst (2).
摘要翻译： 通过（i）聚合以形成（a）结晶丙烯或乙烯聚合物和（b）乙烯和C 3 -C 10α-烯烃的弹性共聚物来制备多相聚烯烃组合物的方法，其中进行聚合 在齐格勒 - 纳塔催化剂存在下，使（ⅰ）中得到的聚合物与（ⅰ）使（ⅰ）中存在的催化剂失活的化合物和（b）由（ⅰ）中得到的催化剂 使（I）含有过渡金属M的化合物和至少一种通过π键与金属M配位的配体，和（II）助催化剂，和（iii）使乙烯和C 3 -C 10α-烯烃在 （ii）中处理的聚合物的存在和催化剂（2）。
-
公开(公告)号：US06686307B2
公开(公告)日：2004-02-03
申请号：US09993512
申请日：2001-11-05
申请人： Mario Sacchetti , Gabriele Govoni , Anna Fait
发明人： Mario Sacchetti , Gabriele Govoni , Anna Fait
IPC分类号： B01J3100
CPC分类号： B01J27/138 , B01J31/0201 , C08F10/00 , C08F110/06 , C08F4/6545 , C08F2500/18 , C08F2500/20 , C08F4/6543 , C08F4/022
摘要： The present invention relates to MgCl2.mROH.nH2O adducts, where R is a C1-C10 alkyl, 2≦m≦4.2, 0≦n≦0.7, characterized by an X-ray diffraction spectrum in which, in the range of 2&thgr; diffraction angles between 5° and 15°, the three main diffraction lines are present at diffraction angles 2&thgr; of 8.8±0.2°, 9.4±0.2° and 9.8±0.2°, the most intense diffraction lines being the one at 2&thgr;=8.8±0.2°, the intensity of the other two diffraction lines being at least 0.2 times the intensity of the most intense diffraction line. Catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity and stereospecificity with respect to the catalysts prepared from the adducts of the prior art.
摘要翻译： 本发明涉及MgCl 2·mROH·nH 2 O加合物，其中R是C 1 -C 10烷基，2 <= m <= 4.2,0 <= n <0.7，其特征在于X射线衍射光谱，其中在 2θ衍射角在5°和15°之间的范围内，三条主要的衍射线分别以8.8±0.2°，9.4±0.2°和9.8±0.2°的衍射角2θ处存在，最强的衍射线为2θ= 8.8±0.2°，其他两条衍射线的强度是最强衍射线强度的0.2倍。由本发明的加合物得到的催化剂成分能够提供用于烯烃聚合的催化剂，其特征在于增强的 相对于由现有技术的加合物制备的催化剂的活性和立体定向性。
-
-
-
-
-
-
-
-
-
搜索结果
35 条记录 (耗时 0.017 秒)