Abstract: An esterification process and the products resulting from it which achieves a mixture of secondary esters which are effectively used with invert drilling muds, the process involving the addition of one or more C.sub.1 -C.sub.5 carboxylic acids and one or more C.sub.3 -C.sub.22 olefins in the presence of an acid catalyst.
Abstract: The present invention relates to synthetic hydrocarbons produced by skeletal isomerization, and the isomerization process. The products are especially useful as the continuous phase of a drilling fluid, for example when prepared from C.sub.14 to C.sub.18 linear alpha-olefins via isomerization or hydroisomerization, and as lube oils.The present invention also relates to a process for producing synthetic hydrocarbons by skeletally isomerizing C.sub.12+ olefins over a catalyst comprising an intermediate pore size molecular sieve, with or without Group VIII metals under skeletal isomerization conditions which result in little, preferably in substantially no, olefin cracking or oligomerization.
Type:
Grant
Filed:
August 27, 1997
Date of Patent:
April 25, 2000
Assignee:
Chevron Chemical Company LLC
Inventors:
Jeffrey C. Gee, Roger C. Williamson, Christophe J. Lawrie, Stephen J. Miller
Abstract: The invention discloses a method of making 2,6-dimethylnaphthalene from any DMN with one methyl on each ring in a two-step hydroisomerization/dehydrogenation process. The catalyst used in the hydroisomerization step is an acidic catalyst such as a silica aluminum catalyst with a hydrogenation/dehydrogenation metal. The catalyst used in the dehydrogenation step is a reforming type catalyst.
Abstract: A synthetic lubricant material is produced by forming a catalyst complex of a boron trifluoride catalyst and at least one alcohol promoter in the absence of olefinic monomer, then oligomerizing a C.sub.4-16 olefinic monomer by adding the olefinic monomer to a reaction vessel containing the catalyst complex, under boron trifluoride pressure, to produce an oligomer product. At least 50 weight % of the olefinic monomer is C.sub.8-16 olefinic monomer.
Abstract: Disclosed is a catalyst precursor, useful to make catalysts useful in the polymerization of olefins, comprising the product obtained by adding a preformed magnesium source to a solution comprising a solvent having dissolved therein a transition metal compound and an alkyl halide.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
October 19, 1999
Assignee:
Chevron Chemical Company
Inventors:
Ronald G. Abbott, Michael J. Krause, David L. Beach
Abstract: A polymerization process is provided comprising contacting under polymerization conditions a catalyst, a taming agent, ethylene and optionally a comonomer, wherein the catalyst comprises chromium oxide, titanium oxide and an inorganic refractory oxide, wherein the taming agent is selected from the group consisting of water, alcohols, aldehydes, ketones, esters, and organic acids and mixtures thereof. The process is especially suited for polymerizing ethylene resins suitable for blow molding use.
Abstract: A process for producing a synthetic hydrocarbon product is provided comprising contacting under isomerization conditions an olefin feed comprising linear olefins with a catalyst comprising an intermediate pore size molecular sieve, wherein the catalyst is substantially free of Group VIII metals. The synthetic hydrocarbon product exhibits a low pour point and low toxicity to marine life.
Type:
Grant
Filed:
December 3, 1996
Date of Patent:
October 12, 1999
Assignee:
Chevron Chemical Company
Inventors:
Jeffrey C. Gee, Roger C. Williamson, Christophe J. Lawrie, Stephen J. Miller
Abstract: A hydrocarbon feed is reformed to enhance para-xylene yield and to minimize ethylbenzene production. The hydrocarbon feed is subjected to catalytic aromatization at elevated temperatures in the presence of hydrogen, using a non-acidic catalyst having at least one Group VIII metal on a non-acidic zeolite support, to produce a reformate stream containing ethylbenzene and xylenes in which the para-xylene content of the xylene fraction is less than equilibrium. Then, at least some of the reformate is reacted at elevated temperatures in the presence of hydrogen, using an intermediate pore size zeolitic catalyst having a modifier in the absence of a Group VIII metal, to isomerize the non-equilibrium xylene fraction. The modifier can be magnesium, calcium, barium, or phosphorus. At least 20 wt. % of the ethylbenzene in the reformate is converted by hydrodealkylation.
Abstract: Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of added sulfur.
Type:
Grant
Filed:
January 11, 1996
Date of Patent:
February 2, 1999
Assignee:
Chevron Chemical Company
Inventors:
John V. Heyse, Bernard F. Mulaskey, Robert A. Innes, Daniel P. Hagewiesche, William J. Cannella, David C. Kramer
Abstract: Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of sulfur.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
December 15, 1998
Assignee:
Chevron Chemical Company
Inventors:
John V. Heyse, Bernard F. Mulaskey, Robert A. Innes, Daniel P. Hagewiesche, William J. Cannella, David C. Kramer
Abstract: Methods for cracking hydrocarbons in reactor systems having improved resistances to carburization and coking. The reactor system comprises a steel portion having provided thereon a Group VIB metal protective layer to isolate the steel portion from hydrocarbons, applied to a thickness effective for isolating the steel portion from the hydrocarbon environment. The protective layer is anchored to the steel substrate through an intermediate carbide-rich, bonding layer.
Abstract: A dimer composition has an improved low temperature viscosity if it has less than a certain amount of normal paraffin. A 1-octene dimer should have less than 0.50 wt. % normal hexadecane, a 1-decene dimer should have less than 0.05 wt. % normal eicosane, a 1-dodecene dimer should have less than 0.60 wt. % normal tetracosane, and a 1-tetradecene dimer should have less than 0.10 wt. % normal octacosane.
Type:
Grant
Filed:
June 16, 1997
Date of Patent:
October 6, 1998
Assignee:
Chevron Chemical Company
Inventors:
Kenneth D. Hope, Ting C. Ho, Barrett L. Cupples
Abstract: A composition is disclosed which comprises a copolymer of ethylene and alkyl acrylate having improved melt-point temperature and/or improved adhesiveness to polymeric substrates. A process for making these compositions is also disclosed. In addition, an ionomer made from the copolymer and a method for making the ionomer are disclosed.
Type:
Grant
Filed:
August 19, 1996
Date of Patent:
September 8, 1998
Assignee:
Chevron Chemical Company
Inventors:
Jerry G. Latiolais, J. Paul Gathright, Nicholas R. Galante, M. Stephen Galland, J. Diores Gallet, Lewis R. Compton, George L. Baker, James H. Wang
Abstract: An oxygen scavenging composition or system is provided comprising at least one polyterpene and at least one catalyst effective in catalyzing an oxygen scavenging reaction. A film, a multi-phase composition, a multi-layer composition, an article comprising the oxygen scavenging composition, a method for preparing the oxygen scavenging composition, and a method for scavenging oxygen are also provided.