Polymerization Of Olefins Only Patents (Class 585/255)
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Patent number: 7989670Abstract: This invention relates to processes to produce liquid poly-alpha-olefins (PAOs) having a kinematic viscosity at 100° C. of more than 20 cSt in the presence of a metallocene catalyst with a non-coordinating anion activator and hydrogen.Type: GrantFiled: January 22, 2007Date of Patent: August 2, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Catalina L. Coker, John F. Walzer, Jr., Peijun Jiang, Steven P. Rucker
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Patent number: 7960486Abstract: The purpose of the present invention is provite a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight even in the presence of hydrogen and can obtain an olefin polymer having good powder characteristics by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; adding a hydrogenation catalyst into the gas phase reaction vessel; and adding a polymerization activity depressant.Type: GrantFiled: August 3, 2009Date of Patent: June 14, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
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Publication number: 20110137091Abstract: In oligomerizing alpha-olefins to produce poly alpha-olefins, the feedstock consists of nonene, or a blend of alpha-olefins comprising nonene. The nonene comprising alpha-olefin feedstock and at least one catalyst are subjected to oligomerization or polymerization conditions in a reactor. Following reaction, the mixture may be subjected to distillations to removed unreacted alpha-olefins and dimers of the alpha-olefins. The resulting product may also be hydrogenated. The final product may also be fractioned to recover at least two fractions of poly alpha-olefins of differing nominal viscosities.Type: ApplicationFiled: November 8, 2010Publication date: June 9, 2011Inventors: Norman Yang, Phillip T. Matsunaga, Maria C.B. Goze
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Publication number: 20110046422Abstract: The invention provides for methods, compositions and systems using bioisoprene derived from renewable carbon for production of a variety of hydrocarbon fuels and fuel additives.Type: ApplicationFiled: June 17, 2010Publication date: February 24, 2011Inventors: Joseph C. MCAULIFFE, Sergey E. Paramonov, Karl J. Sanford
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Publication number: 20100317904Abstract: This disclosure provides for alpha olefin oligomers and polyalphaolefins (or PAOs) and methods of making the alpha olefin oligomers and PAOs. This disclosure encompasses metallocene-based alpha olefin oligomerization catalyst systems, including those that include at least one metallocene and an activator comprising a solid oxide chemically-treated with an electron withdrawing anion. The alpha olefin oligomers and PAOs prepared with these catalyst systems can have a high viscosity index combined with a low pour point, making them particularly useful in lubricant compositions and as viscosity modifiers.Type: ApplicationFiled: June 15, 2010Publication date: December 16, 2010Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Brooke L. Small, Kenneth D. Hope, Albert P. Masino, Max P. McDaniel, Richard M. Buck, William B. Beaulieu, Qing Yang, Eduardo J. Baralt, Eric J. Netemeyer, Bruce Kreischer
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Patent number: 7776277Abstract: A polymerization method comprises, prior to polymerization of a monomer of the cyclic dimer of alpha-hydroxycarboxylic acid, a first mixture of a polymerization catalyst by bypassing a part of the monomer of the cyclic dimer is prepared. Then, the first mixture is mixed with a dominant amount of the monomer introduced into a polymerization reactor. The monomer of the cyclic dimer in the polymerization reactor is conducted in the presence of a polymerization initiator.Type: GrantFiled: July 13, 2007Date of Patent: August 17, 2010Assignee: Hitachi Plant Technologies, Ltd.Inventors: Mamoru Mizumoto, Toshiaki Matsuo, Takayuki Matsumoto, Naruyasu Okamoto, Ryuuji Kajiya
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Patent number: 7510646Abstract: Process for the production of hydrocarbon blends with a high octane number by the hydrogenation of hydrocarbon blends, containing branched C8, C12 and C16 olefinic cuts, characterized by sending said blends, as such or fractionated into two streams, one substantially containing the branched C8 olefinic cut, the other substantially containing the branched C12 and C16 olefinic cuts, to a single hydrogenation zone or to two hydrogenation zones in parallel, respectively, only the stream substantially containing of saturated C8 hydrocarbons, obtained by the fractionation of the stream produced by the single hydrogenation zone or obtained by the hydrogenation zone fed by the fractionated stream substantially containing the branched C8 olefinic cut, being at least partly recycled to the single hydrogenation zone or to the hydrogenation zone fed by the fractionated stream substantially containing the branched C8 olefinic cut, and the hydrocarbon blend with a high octane number, obtained by the fractionation of the stType: GrantFiled: December 29, 2003Date of Patent: March 31, 2009Assignee: Snamprogetti S.p.A.Inventors: Roberto Catani, Marco Di Girolamo, Massimo Conte, Ambrogio Gusberti
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Patent number: 7456329Abstract: Polyolefins made in accordance with the present invention are produced by polymerizing an unsaturated olefin or combination of unsaturated olefins to produce an unsaturated polyolefin, isomerizing the unsaturated polyolefin in the presence of an acid catalyst under conditions to produce a substantially unsaturated-isomerized polyolefin, and hydrogenating the unsaturated-isomerized polyolefin to produce a saturated isomerized polyolefin. A lube oil comprising the inventive saturated isomerized polyolefin is also disclosed.Type: GrantFiled: November 30, 2005Date of Patent: November 25, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Norman Yang, Anatoly Ilich Kramer
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Patent number: 7429553Abstract: This invention relates to a method for reducing the toxicity of a mixture of hydrocarbons by means of fractional distillation, a distillate having a reduced toxicity and a composition including the distillate.Type: GrantFiled: May 15, 2007Date of Patent: September 30, 2008Assignee: Petroleum Oil and Gas Corporation of South Africa (Pty) Ltd.Inventors: Carl Dunlop, Stewart Hlohloza, Petrus Johannes Hoffmann, Cyril David Knottenbelt, Leon Walliser
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Patent number: 7342143Abstract: A method for the processing of a polyalphaolefin feedstock having a concentration of organic halide to thereby yield a polyalphaolefin end-product having a low concentration of organic halide. The method includes a hydrogenation step whereby the polyalphaolefin feedstock is contacted under suitable reaction conditions with a specific hydrogenation catalyst composition that is resistant to halide deactivation. The hydrogenation catalyst comprises a noble metal on a support material comprising silica and alumina. The hydrogenated polyalphaolefin feedstock is further processed to remove the hydrogen halide produced during the hydrogenation step to yield the polyalphaolefin end-product.Type: GrantFiled: September 9, 2004Date of Patent: March 11, 2008Assignee: Shell Oil CompanyInventors: Peter Birke, Kristi Ann Morris, Hans-Dieter Neubauer, Rainer Schoedel
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Patent number: 7326817Abstract: This invention relates to a method for reducing the toxicity of a mixture of hydrocarbons by means of fractional distillation, a distillate having a reduced toxicity and a composition including the distillate.Type: GrantFiled: October 27, 2004Date of Patent: February 5, 2008Assignee: Petroleum Oil and Gas Corporation of South Africa (Pty) Ltd.Inventors: Carl Dunlop, Stewart Hlohloza, Petrus Johannes Hoffmann, Cyril David Knottenbelt, Leon Walliser
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Patent number: 7273957Abstract: A process for the production of gasoline stocks wherein lower molecular weight olefins are first oligomerized and the oligomers then hydrogenated. In the first instance the oligomerization is carried out in a single pass fixed bed boiling point reactor. The oligomers are then hydrogenated in a distillation column reactor.Type: GrantFiled: October 29, 2004Date of Patent: September 25, 2007Assignee: Catalytic Distillation TechnologiesInventors: Amarjit S. Bakshi, Mitchell E. Loescher, Nishit Sahay
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Patent number: 7129197Abstract: One or more oligomers of an olefin are prepared in the presence of a single-site catalyst. Preferably, the olefin is an ?-olefin, and the oligomers are a poly-alpha-olefin (PAO). The PAO so prepared is completely or substantially free of tertiary hydrogen resulting from isomerization. Consequently, the PAO possesses improved biodegradability, improved oxidation resistance, and/or a relatively higher viscosity index. The PAO has many useful applications, such as a component of a lubricant.Type: GrantFiled: August 29, 2002Date of Patent: October 31, 2006Assignee: Shell Oil CompanyInventors: Wei Song, William J. Heilman
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Patent number: 7022784Abstract: A liquid polymer suitable for use as a lubricant base oil is produced by polymerizing ethylene and at least one alpha-olefin using a metallocene catalyst to provide a polymer which is then isomerized and hydrogenated to produce the liquid polymer.Type: GrantFiled: September 16, 2003Date of Patent: April 4, 2006Assignee: ExxonMobil Research and Engineering CompanyInventors: Margaret May-Som Wu, Steven P. Rucker, Richard T. Spissell, Steven Edward Donnachie
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Patent number: 6703356Abstract: The present invention provides a process for polymerizing an olefin to produce poly-olefins using a crystalline catalyst. The resulting poly-olefins have low viscosity and low volatility and may be used in various functional fluids.Type: GrantFiled: March 23, 2000Date of Patent: March 9, 2004Assignee: ExxonMobil Research and Engineering CompanyInventor: Margaret M. Wu
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Patent number: 6613108Abstract: The invention relates to process for dimerizing olefinic hydrocarbon feedstock, to hydrocarbon compositions and to fuel components produced by the process. According to the invention, fresh olefinic hydrocarbon feedstock is fed to a reaction zone of a system including at least one reaction zone and at least one distillation zone. The olefinic hydrocarbon feedstock is contacted with an acidic catalyst in the presence of an oxygenate at conditions in which at least a part of the olefins dimerizes. The effluent from the reaction zone is conducted to the distillation zone where dimerized reaction product is separated from effluent, and at least one flow comprising oxygenate is withdrawn from the side of at least one distillation column. The flow is circulated from distillation zone back to dimerization. The reaction mixture is recovered and optionally hydrogenated to form a parafinic reaction product.Type: GrantFiled: June 30, 1999Date of Patent: September 2, 2003Assignee: Fortum Oil & Gas OyInventors: Juhani Aittamaa, Juha Jakkula, Petri Lindqvist, Matti Koskinen, Juha Linnekoski, Outi Krause, Mauri Sourander, Jyrki Ignatius, Antti Pyhälahti
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Patent number: 6583239Abstract: A process for producing a polymer of an &agr;-olefin which comprises polymerizing an &agr;-olefin having at least 4 carbon atoms in the presence of a catalyst for producing polymers of olefins which comprises (A) a specific metal compound and (B) at least one compound selected from (b-1) an organoaluminum oxy compound and (b-2) an ionic compound. The polymer of an &agr;-olefin is useful as a component of lubricant.Type: GrantFiled: April 15, 2002Date of Patent: June 24, 2003Assignees: Idemitsu Petrochemical Co., Ltd., Idemitsu Kosan Co., Ltd.Inventors: Yutaka Minami, Tatsuya Egawa
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Patent number: 6476283Abstract: Organic compounds are hydrogenated in the presence of certain bis(pentadienyl) divalent Group IV metal complexes having &pgr;-bound, neutral, conjugated diene ligands. These complexes are effective hydrogenation catalysts for polymers containing ethylenic unsaturation. They further provide for selective hydrogenation of ethylenic unsaturation sites in the presence of aromatic groups.Type: GrantFiled: June 29, 2000Date of Patent: November 5, 2002Assignee: The Dow Chemical CompanyInventors: David D. Devore, James C. Stevens, Stephen F. Hahn, Francis J. Timmers, David R. Wilson
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Patent number: 6388149Abstract: A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, wherein from 10 to 50% of the pore volume of the support comprises macropores having a pore diameter in the range of from 50 nm to 10,000 nm and from 50 to 90% of the pore volume of the support comprises mesopores having a pore diameter in the range of from 2 to 50 nm, the sum of said pore volumes being 100%, and said catalyst as such.Type: GrantFiled: November 30, 2000Date of Patent: May 14, 2002Assignee: BASF AktiengesellschaftInventors: Thomas Rühl, Boris Breitscheidel, Jochem Henkelmann, Andreas Henne, Rolf Lebkücher, Konrad Knoll, Paul Naegele, Hermann Gausepohl, Sabine Weiguny, Norbert Niessner
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Patent number: 6376731Abstract: A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and lower alkane diluent; advantageously the isobutylene is derived from the dehydration of tertiary butyl alcohol.Type: GrantFiled: January 14, 2000Date of Patent: April 23, 2002Assignee: Arco Chemical Technology, l.p.Inventors: Thomas I. Evans, Lawrence J. Karas, Ramesh Rameswaran
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Publication number: 20010051759Abstract: Catalyst based on molibden and silicon having a surface area ranging from 20 to 400 m2/g and a molar ratio Mo/Si>0.Type: ApplicationFiled: June 23, 1999Publication date: December 13, 2001Inventors: STEFANO PERATELLO, ANGELA CARATI, GIUSEPPE BELLUSSI, CATERINA RIZZO
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Patent number: 6274783Abstract: A process is disclosed for the concurrent production and hydrogenation of diisobutene in a single distillation column reactor containing both a dimerization catalyst and a hydrogenation catalyst by the dimerized of isobutene to diisobutene. The catalysts may be in alternating beds or physically mixed together in one or more beds. Alternatively a bifunctional catalyst having both dimerization and hydrogenation properties may be used.Type: GrantFiled: March 20, 2000Date of Patent: August 14, 2001Assignee: Catalytic Distillation TechnologiesInventors: Gary R. Gildert, Mitchell E. Loescher
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Publication number: 20010001804Abstract: The present invention relates to a process of producing a highly oxidatively stable polyalphaolefin by hydrogenating a polyalphaolefin to greatly decrease its level of unsaturation.Type: ApplicationFiled: June 30, 1999Publication date: May 24, 2001Inventors: GREGG M. SKLEDAR, KENNETH D. HOPE
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Patent number: 5998685Abstract: A highly flexible process for preparing butene oligomers from field butanes. The process can be controlled to produce the desired oligomerization products by appropriate selection of the starting materials.Type: GrantFiled: July 24, 1997Date of Patent: December 7, 1999Assignee: Huels AktiengesellschaftInventors: Franz Nierlich, Paul Olbrich, Wilhelm Droste, Richard Mueller, Walter Toetsch
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Patent number: 5895830Abstract: A process for the production of C.sub.8 alkene isomers by the oligomerization of light olefins to heavier olefins is improved by the addition of heavy paraffins to the oligomerization zone. The recycle of the heavy paraffins improves the selectivity of the oligomerization for C.sub.8 olefin isomers that have a high octane number when saturated and reduces catalyst fouling. The saturated octane number of the resulting C.sub.8 isomers is particularly improved when the oligomerization zone is operated at reduced temperature conditions.Type: GrantFiled: December 15, 1997Date of Patent: April 20, 1999Assignee: UOP LLCInventors: Laurence O. Stine, Brian S. Muldoon, Steven C. Gimre, Robert R. Frame
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Patent number: 5877372Abstract: A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and isoalkane diluent; advantageously the isobutylene is derived from the dehydration of tertiary butyl alcohol and the isoalkane used as diluent in the dimerization is the product formed by hydrogenation of the oligomerization product.Type: GrantFiled: November 21, 1997Date of Patent: March 2, 1999Assignee: Arco Chemical Technology, L.P.Inventors: Thomas I. Evans, Lawrence J. Karas, Ramesh Rameswaran
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Patent number: 5856604Abstract: A process for the production motor fuel components from isoparaffins by dehydrogenation, oligomerization and saturation uses a single compressor to provide all feed and recycle requirements within the process arrangement. The single compressor can be employed for the integration of all three processes while surprisingly reducing equipment requirements throughout the integrated process arrangement. The compressor raises the effluent pressure of the effluent from the dehydrogenation zone to a level that eliminates the need for any additional compression for the recycle of hydrogen to the saturation zone, eliminates the need for refrigeration to recover butanes from the dehydrogenation zone effluent and allow an essentially complete elimination of heavies from the feed to the oligomerization reaction zone.Type: GrantFiled: September 23, 1997Date of Patent: January 5, 1999Assignee: UOP LLCInventors: Laurence O. Stine, Steven C. Gimre
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Patent number: 5811608Abstract: A process for the production of saturated oligomers by the oligomerization of light olefins to heavier olefins and the saturation of the heavy olefins is improved by the recycle of the heavy paraffins to the oligomerization zone. The recycle of the heavy paraffins improves the selectivity of the oligomerization for C.sub.8 paraffin products and reduces catalyst fouling. The reduced catalyst fouling can be used to operate the oligomerization zone at lower pressure and facilitate its integration with a dehydrogenation zone for the production of the light olefin stream.Type: GrantFiled: December 15, 1995Date of Patent: September 22, 1998Assignee: UOP LLCInventors: Laurence O. Stine, Brian S. Muldoon, Steven C. Gimre, Robert R. Frame
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Patent number: 5780699Abstract: A process is described for the production of synthetic basestocks from an alpha-olefin feedstock with carbon number in the range C.sub.7 -C.sub.30 the feedstock having origin in an ethylene polymerization process, the process comprising contacting the feedstock with a solid or soluble cationic AlCl.sub.3 catalyst. After separation and distilling out of the light fraction of the oligomer, a basestock of excellent viscometric, rheological and thermal stability properties is obtained. The basestocks so obtained are also described.Type: GrantFiled: August 26, 1996Date of Patent: July 14, 1998Assignee: Petroleo Brasileiro S.A.-PetrobrasInventors: Odyr Do Coutto Filho, Noemi Tatizawa
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Patent number: 5714661Abstract: A process for the preparation of oligomers which are used in synthetic lubricant base stocks. The oligomers are prepared by contacting a mixture of linear olefins and n-paraffins contained in cracked refinery streams having 6 to 24 carbon atoms with activated Y-zeolites. The oligomers and unreacted monomers are subjected to the step of hydrogenation and the lower saturated paraffins are separated therefrom to produce synthetic lubricant base stock.Type: GrantFiled: May 31, 1996Date of Patent: February 3, 1998Inventors: Deepak Kumar Tuli, Sabyasachi Sinha Ray, Rakesh Sarin, Madan Mohan Rai, Sobhan Ghosh, Akhilesh Kumar Bhatnagar
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Patent number: 5573657Abstract: A hydrogenation process for reducing the unsaturation of lubricants uses a catalyst which is based on an ultra-large pore crystalline material. The crystalline material has pores of at least 13 .ANG. diameter arranged in a uniform manner and exhibits unusually large sorption capacity demonstrated by its benzene adsorption capacity of greater than about 15 grams benzene/100 grams (50 torr and 25.degree. C.). A preferred form of the catalyst has a hexagonal structure which exhibits a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 .ANG.. The hydrogenation catalysts based on these materials are capable of reducing the unsaturation in poly alpha olefin lubricants to a low level.Type: GrantFiled: September 20, 1994Date of Patent: November 12, 1996Assignee: Mobil Oil CorporationInventors: Thomas F. Degnan, Richard C. Dougherty, George H. Hatzikos, Stuart S. Shih, Tsoung Y. Yan
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Patent number: 5382739Abstract: This invention relates to a process for the production of lubricating oils having a viscosity index of at least 120 and a pour point of at least -45.degree. C. by (a) oligomerizing a mixture of C5-C20 1-olefins comprising at least 2.6% w/w of 1-decene and at least 6% w/w of 1-hexene in the presence of a catalyst. The lubricating oil so formed may be hydrogenated in the presence of hydrogen to improve the oxidation stability thereof. The process is particularly suited to olefins feeds produced during a Fischer-Tropsch synthesis in which carbon monoxide and hydrogen are passed over a heated catalyst.Type: GrantFiled: July 12, 1993Date of Patent: January 17, 1995Assignee: BP Chemicals LimitedInventors: Martin P. Atkins, Mark R. Smith
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Patent number: 5378767Abstract: A method for hydrogenating unsaturated low molecular weight polymers, preferably polydiene monool, diol and polyol polymers, which comprises contacting the polymers under hydrogenation conditions with hydrogen in the presence of a fixed bed heterogeneous catalyst which is comprised of platinum, palladium or a mixture of the two supported on an alpha alumina support.Type: GrantFiled: June 18, 1993Date of Patent: January 3, 1995Assignee: Shell Oil CompanyInventor: Stephen N. Massie
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Patent number: 5344582Abstract: A traction fluid lubricant is disclosed which contains a naphthenic ingredient having a weight average molecular weight of 200-300 and obtained by hydrogenating oligomers of cyclopentadiene having a ratio of the number of norbornenic double bond to that of cyclopentenic double bond of smaller than 0.9 but not smaller than 0.1. The naphthenic ingredient is suitably used in conjunction with an auxiliary ingredient selected from a polybutene having a viscosity of 5-60 cSt at 40.degree. C. and a bicyclohexyl compound.Type: GrantFiled: July 29, 1992Date of Patent: September 6, 1994Assignee: Tonen CorporationInventors: Noboru Umemoto, Takeshi Nomura, Toshiaki Kuribayashi, Takehisa Sato, Hirotaka Tomizawa
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Patent number: 5321175Abstract: Procedure of olefin hydrogenation in liquid phase in the presence of homogeneous catalysts that contain, as essential component, a titanocene of general formula Cp CpTiR.sub.2, Cp CpTiR.sub.2, Cp Cp[CpTiR.sub.2 ].sub.2, or Cp Cp[Cp TiR.sub.2 ].sub.2 where Cp is a pentamethylcyclopentadienyl, Cp cyclopentadienyl, Cp Cp are two cyclopentadienyl rings linked together by a dimethylsililene (Me.sub.2 Si), and R is an alyl, aryl, alkylaryl, or alcoxide group containing between 1 and 20 carbon atoms or a halogen atom, a PPh.sub.2, CH.sub.2 SiMe.sub.3, CH.sub.2 PPh.sub.2, or H.These catalysts are very active in the hydrogenation of linear and branched, internal and external olefins, cycloolefins and diolefins.Type: GrantFiled: December 4, 1992Date of Patent: June 14, 1994Assignee: Repsol Quimica S.A.Inventors: Juan Antonio Barrio Calle, Maria Dolores Parellada Ferrer, Agreda Tomas C., Juan C. F. Serrano, Pascual R. Gracia
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Patent number: 5276229Abstract: A process for the production of synthetic lubricants having high viscosity index by oligomerizing a mixture of alpha-olefins produced from the thermal cracking of slack wax or recycled slack wax. The oligomerization is carried out with a reduced metal oxide catalyst, preferably a carbon monoxide reduced chromium oxide on a silica support. The olefin product from the thermal cracking step is purified, preferably by hydrotreating prior to the oligomerization step.Type: GrantFiled: June 24, 1992Date of Patent: January 4, 1994Assignee: Mobil Oil Corp.Inventors: J. Scott Buchanan, Margaret M. Wu
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Patent number: 5210347Abstract: The 350.degree.-650.degree. F. (177.degree.-343.degree. C.) portion of the product from the oligomerization of light olefin with surface deactivated shape selective medium pore zeolite catalyst particles comprises olefinic hydrocarbons having unique and desirable structures as precursors for high cetane value clean fuels. These oligomers are near linear in structure and contain no aromatics. Following hydrogenation they produce cetane values between 50 and 75. When the near linear olefinic hydrocarbons from surface deactivated zeolite catalyzed oligomerization of light olefins are subjected to ethene metathesis to alpha olefins and oligomerization following the process of Chen et al in U.S. Pat. No. 4,962,249 the overall process reaction product comprises a mixture of a 650.degree. F.+ portion comprising high VI lubricant and a 350.degree.-650.degree. F. portion comprising high cetane clean fuels precursor. Hydrogenation of the 350.degree.-650.degree. F.Type: GrantFiled: September 23, 1991Date of Patent: May 11, 1993Assignee: Mobil Oil CorporationInventors: Catherine S. H. Chen, Dennis H. Hoskin, Suzanne E. Schramm
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Patent number: 5210349Abstract: Cyclic polyenes are selectively hydrogenated to cyclic monoenes under suitable hydrogenation conditions in the presence of an activated ruthenium catalyst complexes. The ruthenium catalyst complex is activated by hydrogenating a minimal amount of cyclic polyene under suitable hydrogenation conditions.Type: GrantFiled: March 4, 1992Date of Patent: May 11, 1993Assignee: Phillips Petroleum CompanyInventors: Michael S. Matson, Harold J. Swindell
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Patent number: 5191130Abstract: An improved process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks are prepared in good yield by oligomerizing linear olefins using montmorillonite clays which have a halogenated phosphorous- containing acid deposited thereon.Type: GrantFiled: December 16, 1991Date of Patent: March 2, 1993Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, John F. Knifton
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Patent number: 5180864Abstract: An improved process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks are prepared in good yield by oligomerizing linear olefins using certain acidic calcium montmorillonite clay catalysts which have aluminum nitrate deposited thereon.Type: GrantFiled: April 30, 1990Date of Patent: January 19, 1993Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, John F. Knifton
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Patent number: 5180869Abstract: A process is disclosed for preparing synthetic lubricant base stocks having improved properties. Synthetic lubricant base stocks may be prepared in good yield by oligomerizing linear olefins using certain acidic montmorillonite clay catalysts. When a mixture of poly(isobutylene) and long-chain linear olefin, in which up to about 10 wt. % of the mixture is poly(isobutylene), is co-reacted in the presence of these catalysts, a synthetic lubricant base stock having a high viscosity and a high viscosity index is prepared.Type: GrantFiled: May 14, 1991Date of Patent: January 19, 1993Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, Edward T. Marquis
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Patent number: 5177277Abstract: A process for the preparation of hydrogenated deodorized polybutene polymers, wherein the polybutene polymer is hydrogenated, distilled to substantially remove low boiling odorous compounds, and treated with silica gel to substantially remove the remaining odorous compounds thereby providing an improved hydrogenated, distilled, silica gel-treated polybutene polymer substantially free of odorous compounds.Type: GrantFiled: December 4, 1991Date of Patent: January 5, 1993Assignee: Amoco CorporationInventors: William S. Eryman, James B. Lents, Yin-Chou Lin, Thomas E. Rehm, Egils Vitands
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Patent number: 5171909Abstract: A process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks may be prepared in good yield by oligomerizing long-chain olefins using certain acidic calcium montmorillonite clay catalysts. When long-chain vinylidene olefin and long-chain alpha- and/or internal-olefin are co-oligomerized, a synthetic lubricant base stock having a lower pour point is obtained.Type: GrantFiled: September 4, 1990Date of Patent: December 15, 1992Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, Edward T. Marquis
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Patent number: 5171918Abstract: Heat transfer, lubricating, functional and/or insulating fluid compositions for use in apparatus such as electrical transformers contain up to 25 weight percent of one or more oil additives and a 1-octene and/or 1-decene dimer and/or a 1-octene and 1-decene co-dimer oil having improved low temperature properties which oil contains less than about 2.5 weight percent of, respectively, the 7-methylpentadecene, 9-methylnonadecene and, 7- and 9-methylheptadecene isomers. The dimers can be hydrogenated to provide the saturated counterparts of the isomers.Type: GrantFiled: May 28, 1991Date of Patent: December 15, 1992Assignee: Ethyl CorporationInventors: Ronald L. Shubkin, Kevin J. Theriot
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Patent number: 5171904Abstract: Synthetic lubricant base stocks having a low pour point are disclosed. These synthetic lubricant base stocks comprise a mixture of (1) oligomers prepared from a linear olefin having from 10 to 24 carbon atoms; and (2) alkylated decalin having an alkyl group containing from 10 to 24 carbon atoms. These synthetic lubricant base stocks may be prepared by hydrogenating the co-reaction products of a linear olefin having from 10 to 24 carbon atoms and naphthalene.Type: GrantFiled: May 31, 1990Date of Patent: December 15, 1992Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, Edward T. Marquis
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Patent number: 5171908Abstract: The invention is directed to method of making a thermally and oxidatively stable lubricating oil having a high viscosity index and a low pour point by the thermal polymerization of 1-olefins containing 8 to 10 carbon atoms, the preferred 1-olefins are 1-decanes. The polymerization is conducted at temperatures ranging from 280.degree. C. to 350.degree. C. and low pressures, of less than about 280 psig, in a reactor which is free of catalytic material. Thereafter, the polyalphaolefin is hydrotreated over a nickel catalyst, preferably nickel on Kieselguhr. In an improved process the polyalphaolefin is separated from a low molecular weight product by distillation. The low molecular product contains unreacted 1-olefins which are recycled to the thermal polymerization zone to produce more of the lubricant base stock.Type: GrantFiled: November 18, 1991Date of Patent: December 15, 1992Assignee: Mobil Oil CorporationInventor: Leslie R. Rudnick
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Patent number: 5146023Abstract: A process is disclosed for preparing synthetic lubricant base stocks having improved properties. Synthetic lubricant base stocks may be prepared in good yield by oligomerizing linear olefins using certain acidic calcium montmorillonite clay catalysts. When a mixture of alpha and internal-olefins having up to 50 wt. % internal-olefin is used, and the oligomers prepared therefrom are hydrogenated, a synthetic lubricant base stock having a higher viscosity index and a lower pour point is prepared.Type: GrantFiled: April 30, 1990Date of Patent: September 8, 1992Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, Edward T. Marquis
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Patent number: 5146022Abstract: A process is disclosed for the production of synthetic lubricants having high viscosity index and thermal stability by oligomerizing a mixture of C.sub.5 -C.sub.18 or C.sub.6 -C.sub.16 alpha-olefins produced from the thermal cracking of slack wax or recycled slack wax. The oligomerization is carried out with Lewis acid catalyst. Promoted aluminum chloride is a preferred catalyst.Type: GrantFiled: August 23, 1990Date of Patent: September 8, 1992Assignee: Mobil Oil CorporationInventors: J. Scott Buchanan, Margaret M. Wu
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Patent number: 5136118Abstract: A process is disclosed for the production of synthetic hydrocarbon lubricants having high viscosity index by oligomerizing a mixture of alpha-olefins comprising the reaction product from the thermal cracking of refined wax. The oligomerization is carried out with Lewis acid catalyst or reduced chromium oxide on porous support.Type: GrantFiled: August 23, 1990Date of Patent: August 4, 1992Assignee: Mobil Oil CorporationInventors: J. Scott Buchanan, Margaret M. Wu
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Patent number: 5120891Abstract: An improved process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks are prepared in good yield by oligomerizing linear olefins using a catalyst comprising a super-dealuminated Y-zeolite.Type: GrantFiled: September 26, 1990Date of Patent: June 9, 1992Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, Pei S. E. Dai, John F. Knifton