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1.发明授权Controlled addition of alkali or alkaline earth salts to a chromium oxide catalyst 失效将碱金属盐或碱土金属盐控制加入到氧化铬催化剂中
公开(公告)号：US5444132A
公开(公告)日：1995-08-22
申请号：US162231
申请日：1993-12-06
CPC分类号： C08F10/00
摘要： An improved supported chromium oxide catalyst, a process for preparing the catalyst and a process for polymerizing olefin monomers utilizing the catalyst are provided. In accordance with the preparation process, chromium oxide and a support containing one or more of silica, titania, thoria, alumina, zirconia or aluminophosphates are combined, impregnated with a metal salt and activated. The metal salt is selected from the group consisting of alkali metal salts, alkaline earth metal salts and mixtures thereof.
摘要翻译： 提供改进的负载型氧化铬催化剂，制备催化剂的方法和利用该催化剂聚合烯烃单体的方法。 根据制备方法，将氧化铬和含有二氧化硅，二氧化钛，氧化钍，氧化铝，氧化锆或铝磷酸盐中的一种或多种的载体合并，浸渍金属盐并活化。 金属盐选自碱金属盐，碱土金属盐及其混合物。
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公开(公告)号：US5284811A
公开(公告)日：1994-02-08
申请号：US69695
申请日：1993-06-01
CPC分类号： C08F10/00
摘要： An improved supported chromium oxide catalyst, a process for preparing the catalyst and a process for polymerizing olefin monomers utilizing the catalyst are provided. In accordance with the preparation process, chromium oxide and a support containing one or more of silica, titania, thoria, alumina, zirconia or aluminophosphates are combined, impregnated with a metal salt and activated. The metal salt is selected from the group consisting of alkali metal salts, alkaline earth metal salts and mixtures thereof.
摘要翻译： 提供改进的负载型氧化铬催化剂，制备催化剂的方法和利用该催化剂聚合烯烃单体的方法。 根据制备方法，将氧化铬和含有二氧化硅，二氧化钛，氧化钍，氧化铝，氧化锆或铝磷酸盐中的一种或多种的载体合并，浸渍金属盐并活化。 金属盐选自碱金属盐，碱土金属盐及其混合物。
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公开(公告)号：US4392990A
公开(公告)日：1983-07-12
申请号：US340937
申请日：1982-01-20
申请人： Donald R. Witt
发明人： Donald R. Witt
IPC分类号： C08F4/00 , B01J21/06 , B01J23/26 , B01J37/00 , C08F4/06 , C08F4/22 , C08F4/24 , C08F10/00 , C08F210/16
CPC分类号： B01J21/063 , B01J23/26 , B01J37/0018 , C08F10/00
摘要： A silica hydrogel is contacted with a hydroxy-containing organic compound which is not completely miscible with water but which is sufficiently miscible with water so as to remove water, and thereafter the organic compound is removed by heating in an inert atmosphere prior to activation by heating in air. The heating in the inert atmosphere allows utilizing preferred organic compounds such as C.sub.5 and C.sub.6 alcohols which are desirable from a commercial standpoint because of the easy separation for recycle. In a preferred embodiment, the hydrogel is aged at a pH of 7 to 9 by means of either adding a base or by utilizing a chromium component containing bound nitrogen.
摘要翻译： 将二氧化硅水凝胶与不与水完全混溶但与水充分混溶以除去水的含羟基有机化合物接触，然后通过加热活化之前在惰性气氛中加热除去有机化合物 在空气中 在惰性气氛中的加热允许使用优选的有机化合物如C5和C6醇，这是有利于商业上的观点，因为容易的再循环分离。 在优选的实施方案中，通过加入碱或通过使用含有结合氮的铬组分，水解凝胶在pH为7至9的条件下老化。
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公开(公告)号：US4081407A
公开(公告)日：1978-03-28
申请号：US667935
申请日：1976-03-18
申请人： James N. Short , Donald R. Witt
发明人： James N. Short , Donald R. Witt
CPC分类号： C08F10/02 , Y10S526/905
摘要： A method is provided for treating a hydrogel with a saturated, aliphatic alcohol selected from the group consisting of 1-pentanol, 2-pentanol, 3-methyl-1-butanol, 4-methyl-2-pentanol, 2,2-dimethyl-1-propanol and 1-hexanol to remove water thereby producing a dried product that retains a porous structure and is particularly suitable upon impregnation with a polymerization catalyst for use in promoting the production of ethylene polymers of melt index in excess of about 6.6.
摘要翻译： 提供一种用饱和脂族醇处理水凝胶的方法，所述饱和脂族醇选自1-戊醇，2-戊醇，3-甲基-1-丁醇，4-甲基-2-戊醇，2,2-二甲基-2-戊醇， 1-丙醇和1-己醇以除去水，从而产生保留多孔结构的干燥产物，并且特别适用于浸渍聚合催化剂，用于促进熔体指数超过约6.6的乙烯聚合物的生产。
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5.发明授权Reactivation of organochromium olefin polymerization catalyst in presence of oxygen 失效有机铬烯烃聚合催化剂在氧气存在下的再活化
公开(公告)号：US4001196A
公开(公告)日：1977-01-04
申请号：US529534
申请日：1974-12-04
申请人： Donald R. Witt
发明人： Donald R. Witt
IPC分类号： C08F10/00 , C08F4/02 , C08F4/22 , C08F110/02
CPC分类号： C08F10/00 , Y02P20/584
摘要： A particulate catalyst support containing titanium is heated to activation temperature and thereafter impregnated with a .pi. bonded organochromium compound. Thereafter the chromium-containing catalyst is reactivated, at least a portion of the reactivation occurring in the presence of oxygen. Such catalysts are particularly suitable for the production of high melt index polymer from at least one mono-1-olefin containing 2 to 8 carbon atoms per molecule.
摘要翻译： 将含有钛的颗粒状催化剂载体加热至活化温度，然后用pi键合的有机铬化合物浸渍。 此后，含铬催化剂再活化，至少一部分再活化在氧气存在下进行。 这种催化剂特别适用于从每分子含有2至8个碳原子的至少一种单-1-烯烃生产高熔体指数聚合物。
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公开(公告)号：US4152503A
公开(公告)日：1979-05-01
申请号：US864112
申请日：1977-12-23
申请人： James N. Short , Donald R. Witt
发明人： James N. Short , Donald R. Witt
CPC分类号： C08F10/02 , Y10S526/905
摘要： A method is provided for treating a hydrogel with a saturated, aliphatic alcohol selected from the group consisting of 1-pentanol, 2-pentanol, 3-methyl-1-butanol, 4-methyl-2-pentanol, 2,2-dimethyl-1-propanol and 1-hexanol to remove water thereby producing a dried product that retains a porous structure and is particularly suitable upon impregnation with a polymerization catalyst for use in promoting the production of ethylene polymers of melt index in excess of about 6.6.
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公开(公告)号：US4136061A
公开(公告)日：1979-01-23
申请号：US858037
申请日：1977-12-06
申请人： John P. Hogan , Donald R. Witt
发明人： John P. Hogan , Donald R. Witt
IPC分类号： B01J8/28 , C08F110/02 , B01J29/00 , B01J8/00 , C01B17/82
CPC分类号： B01J8/28 , C08F110/02
摘要： A multiple zone apparatus for treating particulate solids and a method for treating particulate solids in seriatim multiple zones are provided. Particulate solids treatment such as the activation of chromium-silica olefin polymerization catalyst is carried out continuously by employing multiple fluidized beds with overflow of solids from one bed to the next lower bed. Each bed has its own source of heat and fluidizing gas to permit step-wise treatment of the particulate solids as particles pass through the system. Temperatures in each zone can be regulated for treatment of the solids in a predetermined manner. In a preferred embodiment each bed is transversely divided with a partition containing a hole sized for forwarding flow from the solids inlet side of the bed to the outlet side without backflow.
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公开(公告)号：US3974101A
公开(公告)日：1976-08-10
申请号：US505997
申请日：1974-09-16
申请人： Donald R. Witt
发明人： Donald R. Witt
IPC分类号： C01B33/154 , C01B33/16 , C08F10/00 , B01J29/00
CPC分类号： C01B33/16 , C01B33/154 , C08F10/00 , Y10S502/506 , Y10S502/513
摘要： A method for preparing silica-containing olefin polymerization catalysts, and the process performable therewith, the preparation involving adding an alkali metal silicate to an acid under defined conditions of addition to produce a hydrogel, recovering the gel in the substantially dry condition by employment of an oxygenated organic compound and impregnating the gel with a chromium compound.
摘要翻译： 一种制备含二氧化硅的烯烃聚合催化剂的方法及其可执行的方法，该方法包括在限定的添加条件下向酸中加入碱金属硅酸盐以制备水凝胶，通过使用 氧化有机化合物并用铬化合物浸渍凝胶。
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公开(公告)号：US5073531A
公开(公告)日：1991-12-17
申请号：US520372
申请日：1990-05-07
申请人： Donald R. Witt
发明人： Donald R. Witt
CPC分类号： C08F10/00
摘要： Sodium-free olefin polymerization catalysts having high polymerization activities and methods of preparing such catalysts are provided. A hydrolyzable silicate ester and a hydrolyzable acid-generating chromium compound are combined with water and an organic solvent whereby a hydrolysis reaction solution is formed comprising silica and chromium. Sufficient acid-neutralizing gelling agent is added to the solution to form a gelled silica-chromium catalyst and the catalyst is aged to stabilize its structure. Water and solvent are removed from the catalyst and the catalyst is activated.
摘要翻译： 提供了具有高聚合活性的无钠烯烃聚合催化剂和制备这种催化剂的方法。 将水解性硅酸酯和可产生水解酸的铬化合物与水和有机溶剂结合，由此形成包含二氧化硅和铬的水解反应溶液。 向溶液中加入足够的酸中和胶凝剂以形成凝胶状二氧化硅 - 铬催化剂，并使催化剂老化以稳定其结构。 从催化剂中除去水和溶剂，催化剂被活化。
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10.发明授权Polymerization process utilizing a catalyst prepared by aging of a chromium-containing gel at high pH 失效使用通过在高pH下老化含铬凝胶制备的催化剂的聚合方法
公开(公告)号：US4436882A
公开(公告)日：1984-03-13
申请号：US423593
申请日：1982-09-27
申请人： Donald R. Witt
发明人： Donald R. Witt
CPC分类号： C08F10/00
摘要： A silica hydrogel containing chromium is aged under conditions such that at least a portion of the aging is carried out at a pH within the range of 7 to 9. The resulting hydrogel is converted to a xerogel by treating with a volatile organic liquid. The desired pH can be obtained either by adding a basic material such as ammonia to the hydrogel prior to or during the aging process or by using a chromium component which inherently gives a higher pH and/or resists the natural tendency for the pH to decrease during aging. An example of such a chromium compound is chloropentammine chromium(III) chloride. The resulting catalyst on activation is particularly suitable for olefin polymerization under conditions where higher melt flow polymer is desired.
摘要翻译： 含有铬的二氧化硅水凝胶在使得至少一部分老化在pH7至9范围内进行的条件下老化。所得水凝胶通过用挥发性有机液体处理而转化为干凝胶。 期望的pH可以通过在老化过程之前或期间向水凝胶中添加碱性物质如氨来获得，或通过使用固有地赋予较高pH值的铬组分和/或抵抗pH降低的天然倾向 老化。 这种铬化合物的实例是氯丙胺氯化铬（III）。 所得到的活化催化剂特别适合在需要较高熔体流动聚合物的条件下进行烯烃聚合。
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