| Patent Number |
Title Of Patent |
Date Issued |
| 4618595 |
Polymerization of olefins |
October 21, 1986 |
| A catalyst, a process of forming the catalyst, and polymerizing at least one alpha-olefin with the catalyst, said catalyst produced by precipitating a composition from a solution of a metal halide, for example, magnesium dihalide, and a transition metal compound, for example, titaniu |
| 4532272 |
Creation and maintenance of the bed of a particle form evaporator |
July 30, 1985 |
| An additive comprising at least one parting agent is added to a particle form evaporator to reduce the buildup of polymer on the walls and rotor of the agitated bed of the particle form evaporator. In an alternate embodiment, the additive employed further comprises at least one filler. |
| 4472523 |
Zirconium-titanium catalyzed olefin polymerization |
September 18, 1984 |
| Olefins such as ethylene can be polymerized in high productivities using a catalyst system wherein one catalyst component comprises a precipitated complex of zirconium tetrahydrocarbyloxide and/or titanium tetrahydrocarbyloxide and dihydrocarbylmagnesium. The productivity of the pref |
| 4410451 |
Catalyst and process |
October 18, 1983 |
| A high surface area catalyst component or support is produced by swelling a magnesium halide, e.g., MgCl.sub.2, with a secondary or tertiary alcohol, adding a hydrocarbon diluent, and removing some or substantially all of the free or unreacted alcohol. In one preferred embodiment, the al |
| 4396747 |
Zirconium-titanium catalyzed olefin polymerization |
August 2, 1983 |
| Olefins such as ethylene can be polymerized in high productivities using a catalyst system wherein one catalyst component comprises a precipitated complex of zirconium tetrahydrocarbyloxide and/or titanium tetrahydrocarbyloxide and dihydrocarbylmagnesium. The productivity of the pref |
| 4362648 |
Polymerization of olefins |
December 7, 1982 |
| A catalyst composition can be obtained by gently milling a milled mixture of magnesium chloride and a titanium tetrahalide with a magnesium alkoxide. The catalyst composition can be combined with a metallic hydride or, preferably, an organometallic co-catalyst, e.g., an organoaluminum |
| 4347161 |
Polymerization of olefins |
August 31, 1982 |
| A catalyst composition can be obtained by treating a magnesium halide-tetravalent, halogenated titanium compound mixture with a magnesium alkoxide. The catalyst composition can be combined with a metallic hydride or, preferably, an organometallic co-catalyst, e.g., an organoaluminum |
| 4316818 |
Polymerization catalyst and process |
February 23, 1982 |
| An active olefin polymerization catalyst is produced by halogenating magnesium oxide, contacting the halogenated magnesium oxide product with an alcohol, and treating the product thus produced with a titanium tetrahalide to obtain the catalyst. The catalyst can be combined with a coc |
| 4312968 |
Polymerization of olefins |
January 26, 1982 |
| A process for polymerizing alpha-olefins in the presence of a catalyst comprising two components. Component A is obtained by mixing a milled mixture of magnesium and particulate inorganic solid with an alcohol and then contacting the resultant product with a tetravalent halogenated t |
| 4243552 |
Polymerization catalyst and process |
January 6, 1981 |
| Alpha-olefins are polymerized employing a catalyst which forms on mixing a catalyst component A formed by milling together a magnesium halide or manganous halide with selected catalyst adjuvants followed by treatment of the resulting milled product with a halogenated tetravalent titanium |
| 4240929 |
Polymerization of olefins |
December 23, 1980 |
| A catalyst composition can be obtained by treating a magnesium halide-tetravalent, halogenated titanium compound mixture with a magnesium alkoxide. The catalyst composition can be combined with a metallic hydride or, preferably, an organometallic co-catalyst, e.g., an organoaluminum |
| 4238354 |
Polymerization of olefins |
December 9, 1980 |
| A process for polymerizing alpha-olefins in the presence of a catalyst comprising two components. Component A is obtained by mixing a milled mixture of magnesium and particulate inorganic solid with an alcohol and then contacting the resultant product with a tetravalent halogenated t |
| 4235746 |
Polymerization of olefins |
November 25, 1980 |
| A process for polymerizing alpha-olefins in the presence of a catalyst comprising two components. Component A is obtained by mixing a magnesium dihydrocarbyloxide compound with a tetravalent, halogenated titanium compound and then contacting the resultant product with a dihydrocarbyl |
| 4194076 |
Washing magnesium reducing agent prepared in absence of complexing diluent |
March 18, 1980 |
| An organic halide is reacted with magnesium metal in the absence of an ether or other complexing diluent, preferably in the absence of any extraneous diluent to produce a magnesium reducing agent. In one embodiment, the halide is added dropwise to the magnesium metal. The resulting m |
| 4194075 |
Magnesium reducing agent-hydrocarbylaluminum halide cocatalyst for titanium tetrahalide |
March 18, 1980 |
| A magnesium reducing agent is prepared by reacting an organic halide with magnesium metal in the absence of an ether or other complexing diluent, preferably in the absence of any extraneous diluent, to form a magnesium reducing agent which is thereafter mixed with an organoaluminum halid |
| 4186260 |
Olefin polymerization process |
January 29, 1980 |
| A method for preparing a composition of matter comprising silica and titanium, convertible to a catalyst suitable for olefin polymerization by the addition of chromium and the process performable therewith, the preparation involving adding an alkali metal silicate to an acid containi |
| 4130505 |
Two stage activation of fluorided chromium-containing catalyst |
December 19, 1978 |
| Catalyst is produced by first activating a chromium-containing silicon-containing support at calcination temperature, treating with a fluoride compound and thereafter heating at a lower temperature of 300.degree. to 1000.degree.F for about 1 to 20 hours. Catalysts thus produced are o |
| 4119569 |
Olefin polymerization catalyst |
October 10, 1978 |
| A method for preparing a composition of matter comprising silica and titanium, convertible to a catalyst suitable for olefin polymerization by the addition of chromium and the process performable therewith, the preparation involving adding an alkali metal silicate to an acid containi |
