1
Shang Chou, Curtis B Campbell: Oil recovery method for waxy crude oil using alkylaryl sulfonate surfactants derived from alpha-olefins and the alpha-olefin compositions. Chevron U, Chevron Chemical Company, A Stephen Zavell, August 7, 2001: US06269881 (127 worldwide citation)

An oil recovery process is disclosed which uses a particular class of alkylaryl sulfonate surfactants. The surfactants are derived from an alpha-olefin stream having a broad distribution of even carbon numbers ranging from 12 to 58. The olefin stream is reacted with aromatic feedstock, such as benze ...


2
Gary A Ash, Nhu Q Dao, Arnold J Gloyn, N J Haritatos, Paul I Hodgen, Stuart R MacPherson, Scott Gordon Morrison, Gerald J Nacamuli, Paul M Spindler, Bruce J Thom, Eric P Weber, Richard Wolpert: Process for converting hydrocarbon feed to high purity benzene and high purity paraxylene. Chevron Chemical Company, Tobor Goldstein & Healey L, December 21, 1999: US06004452 (68 worldwide citation)

A process is provided for producing high purity benzene and high purity paraxylene from a hydrocarbon feed. In one aspect, the process comprises: (a) reforming a hydrocarbon feed using either a monofunctional catalyst or a bifunctional catalyst to provide one or more reformate streams; (b) fractiona ...


3
James J Harrison, William R Ruhe Jr: Polyalkylene succinimides and post-treated derivatives thereof. Chevron Chemical Company, Ernest A Schaal, February 10, 1998: US05716912 (55 worldwide citation)

A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions; then treating the reaction product with either a cyclic carbonate or a linear mono- or polycarbonate or boro ...


4
Stuart H Brown: Grease composition with improved antiwear properties. Chevron Chemical Company, Ernest A Schaal, June 24, 1997: US05641730 (55 worldwide citation)

An antiwear additive has an alkali metal borate; and a thiadiazole compound. That thiadiazole compound may be a 2,5-dimercapto-1,3,4-thiadiazole, a 2-alkylpolythio-5-mercapto-1,3,4-thiadiazole, or a 2-alkylestermercapto-5-mercapto-1,3,4-thiadiazole. If the thiadiazole compound is a 2-alkylpolythio-5 ...


5
Kiyoshi Katsumoto, Ta Yen Ching, Leslie P Theard, Steven P Current: Multi-component oxygen scavenger system useful in film packaging. Chevron Chemical Company, Burns Doane Swecker & Mathis, August 26, 1997: US05660761 (50 worldwide citation)

An improved oxygen scavenging system is provided. The system involves an oxygen scavenging phase containing at least one oxygen-scavenger and a second phase comprising at least one catalyst effective in catalyzing a scavenging reaction. The oxygen scavenging phase is substantially devoid of any cata ...


6
Kenneth D Hope, Michael S Driver, Thomas V Harris: High viscosity polyalphaolefins prepared with ionic liquid catalyst. Chevron Chemical Company, Charles W Stewart, May 28, 2002: US06395948 (50 worldwide citation)

A process for preparing very high viscosity polyalphaolefins using an acidic ionic liquid oligomerization catalyst in the absence of an organic diluent and the products formed thereby.


7
Thomas V Harris, Curt B Campbell, Mohammed M Habib: Process for producing an alkylated, non-oxygen-containing aromatic hydrocarbon. Chevron Chemical Company, Ernest A Schaal, July 13, 1999: US05922922 (45 worldwide citation)

An alkylated aromatic hydrocarbon is produced having the following properties: (a) less than 40 wt. % of the alkylated aromatic hydrocarbon is 2-aryl; and (b) at least 20 wt. % of the alkylated aromatic hydrocarbon is a monoalkylate. That alkylated aromatic hydrocarbon is produced by isomerizing a n ...


8
James J Harrison, William R Ruhe Jr: Dispersant compositions having polyalkylene succinimides. Chevron Chemical Company, Ernest A Schaal, December 22, 1998: US05851965 (44 worldwide citation)

A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuccinic acid derivative has a Mn of from 1000 to 50 ...


9
James J Harrison, William R Ruhe Jr: Polymeric dispersants having polyalkylene and succinic groups. Chevron Chemical Company, Ernest A Schaal, April 1, 1997: US05616668 (42 worldwide citation)

Novel copolymers of unsaturated acidic reactants and high molecular weight olefins are useful as dispersants in lubricating oils and fuels and also may be used to prepare polysuccinimides and other post-treated additives useful in lubricating oils and fuels. The ratio of anhydride groups to the hydr ...


10
James J Harrison, William R Ruhe Jr: Fuel compositions having polyalkylene succinimides and preparation thereof. Chevron Chemical Company, Ernest A Schaal, December 29, 1998: US05853434 (42 worldwide citation)

A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuccinic acid derivative has a Mn of from 1000 to 50 ...