| Patent Number |
Title Of Patent |
Date Issued |
| RE31443 |
Treatment of silica |
November 15, 1983 |
| A silica-containing composition suitable for supporting chromium to produce a catalyst capable of giving high melt flow olefin polymers for such applications as injection molding and the like requiring a narrow molecular weight distribution, is produced by treating a silica-containing |
| RE31390 |
Treatment of silica |
September 20, 1983 |
| A silica-containing composition suitable for supporting chromium to produce a catalyst capable of giving high melt flow olefin polymers for such applications as injection molding and the like requiring a narrow molecular weight distribution, is produced by treating a silica-containing |
| 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 |
| 4410671 |
Catalyst, method of producing the catalyst, and polymerization process employing the catalyst |
October 18, 1983 |
| A transition metal compound and a metal halide compound are chemically combined to form a composition of matter. The composition of matter is mixed with a precipitating agent to form an active olefin polymerization catalyst. The catalyst can be further treated with a halide ion exchangin |
| 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 |
| 4331791 |
Polymerization process using high molecular weight epoxides |
May 25, 1982 |
| Active polymerization catalyst is deactivated using a high molecular weight epoxide. |
| 4331558 |
Polymerization catalyst and process |
May 25, 1982 |
| 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 comprising aryl carbonic acid esters followed by treatment of the resulting milled product wi |
| 4326988 |
Catalyst, method of producing the catalyst, and polymerization process employing the catalyst |
April 27, 1982 |
| A transition metal compound and a metal halide compound are chemically combined to form a composition of matter. The composition of matter is mixed with a precipitating agent to form an active olefin polymerization catalyst. The catalyst can be further treated with a halide ion exchangin |
| 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 |
| 4307214 |
SC.sub.2 activation of supported chromium oxide catalysts |
December 22, 1981 |
| A method for producing activated catalysts in which a catalyst containing chromium on a silica-containing support is (1) contacted with a gaseous environment consisting essentially of sulfur dioxide and oxygen at a temperature in a range of about 450.degree. C. to about 1100.degree. C. |
| 4297460 |
Treatment of silica |
October 27, 1981 |
| A silica-containing composition suitable for supporting chromium to produce a catalyst capable of giving high melt flow olefin polymers for such applications as injection molding and the like requiring a narrow molecular weight distribution, is produced by treating a silica-containing |
| 4295997 |
SO.sub.2 Activation of supported chromium oxide catalysts |
October 20, 1981 |
| A method for producing activated catalysts in which a catalyst containing chromium on a silica-containing support is (1) contacted with a gaseous environment consisting essentially of sulfur dioxde and oxygen at a temperature in a range of about 450.degree. C. to about 1100.degree. C. |
| 4284748 |
Olefin polymerization |
August 18, 1981 |
| Polymerization of olefins in the presence of a catalyst system comprising a titanium-containing composition associated with silica and a cocatalyst comprising a metal hydride or organic metal compound derived from an element of Groups I-III of the Periodic Table. |
| 4277587 |
Sulfiding and reoxidation of chromium catalyst |
July 7, 1981 |
| High melt flow olefin polymers suitable for such applications as injection molding, and the like requiring a narrow molecular weight distribution are produced using a catalyst made by treating a chromium catalyst on a silica-containing base with a sulfur-containing material, and thereaft |
| 4248735 |
Treatment of silica |
February 3, 1981 |
| A silica-containing composition suitable for supporting chromium to produce a catalyst capable of giving high melt flow olefin polymers for such applications as injection molding and the like requiring a narrow molecular weight distribution, is produced by treating a silica-containing |
| 4247421 |
Activation of supported chromium oxide catalysts |
January 27, 1981 |
| A method for activating supported chromium oxide catalysts in which a dry catalyst of inorganic or organic chromium compound dispersed on a silica-containing substrate (1) is contacted with a normally liquid organic aliphatic hydroxy compound, preferably at or above the boiling point |
| 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 |
| 4238369 |
Chromium-silica catalysts by hydrothermal treating |
December 9, 1980 |
| A catalyst composition of a chromium compound supported on a silica-containing substrate is prepared by contacting the silica-containing substrate with a gaseous carrier containing water vapor at a temperature in the range above about 1100.degree. F. to about 2000.degree. F. for a ti |
| 4234710 |
Catalyst and a polymerization process employing the catalyst |
November 18, 1980 |
| Alpha olefins are polymerized employing a catalyst which forms on mixing a first component resulting from admixture of a halogenated titanium compound and a magnesium or manganese halide; a second component which is an organoaluminum compound; a third component which is a Lewis base; and |
| 4211863 |
Polymer slurry catalyst residue deactivation |
July 8, 1980 |
| Catalyst residues of a transition metal compound and an organometalliccompound contained in a polymer slurry are deactivated by contact with anhydrous carbon dioxide. Preferably the contacting is carried out in a transfer line connecting the reaction zone with a zone of sufficiently |
| 4182815 |
Reduction and reoxidation of cogel or self-reduced catalyst |
January 8, 1980 |
| High melt flow olefin polymers suitable for such applications as injection molding, and the like requiring a narrow molecular weight distribution are produced using a catalyst made by reducing and reoxidizing a chromium catalyst on either a titanium-silica cogel or a self-reduced sil |
| 4177162 |
Sulfiding and reoxidation of chromium catalyst |
December 4, 1979 |
| High melt flow olefin polymers suitable for such applications as injection molding, and the like requiring a narrow molecular weight distribution are produced using a catalyst made by treating a chromium catalyst on a silica-containing base with a sulfur-containing material, and thereaft |
| 4151122 |
Reduction and reoxidation of cogel or self-reduced catalyst |
April 24, 1979 |
| High melt flow olefin polymers suitable for such applications as injection molding, and the like requiring a narrow molecular weight distribution are produced using a catalyst made by reducing and reoxidizing a chromium catalyst on either a titanium-silica cogel or a self-reduced sil |
