Patents by Inventor Joosup Shim
Joosup Shim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5602086Abstract: The inclusion of alkylated aromatic base fluids, such as alkylated naphthalene, blending stocks with polyalphaolefin base fluids provides significant performance improvements in oxidation stability, solubility, elastomer compatibility and hydrolytic stability.Type: GrantFiled: April 19, 1996Date of Patent: February 11, 1997Assignee: Mobil Oil CorporationInventors: Quang N. Le, Joosup Shim
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Patent number: 5177284Abstract: This application discloses critical parameters, including process conditions and catalysts which effect the alpha:beta ratio of alkylated naphthalene isomers. The use of low alkylation temperatures and of low acidity zeolite catalysts (e.g. steamed USY and zeolite beta) lead to an increase in the alpha:beta ratio. The alkylated naphthalene fluids with higher alpha:beta ratio exhibited significantly enhanced product qualities, including thermal and oxidative stabilities.Type: GrantFiled: May 28, 1991Date of Patent: January 5, 1993Assignee: Mobil Oil CorporationInventors: Quang N. Le, Joosup Shim
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Patent number: 5107049Abstract: The thermal stability of poly alpha-olefin (PAO) lubricant basestocks are improved by reacting an aromatic compound with the alpha-olefin oligomer. The PAO materials are prepared by oligomerization of olefins such as 1-decene in the presence of a Lewis acid oligomerization catalyst. The resulting lubricant basestock product exhibits high viscosity, viscosity index and low pour point in addition to the unique enhancement in thermal stability. The reaction between the PAO and the aromatic is carried out in the presence of a solid, cyrstalline alkylation catalyst identified by a specific X-ray diffraction pattern. The preferred catalyst for this purpose is the material known as MCM-22.Type: GrantFiled: October 5, 1990Date of Patent: April 21, 1992Assignee: Mobil Oil CorporationInventors: Quang N. Le, Joosup Shim, Stephen S. Wong
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Patent number: 5105042Abstract: There is provided a sulfated layered titanium oxide catalyst. Relatively long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively long chain alkylating agent under alkylation reaction conditions in the presence of this sulfated layered material as alkylation catalyst. The layered material contains titanium oxide in the layers and oxide pillars separating the layers. The alkylation activity of the catalyst is increased by including sulfate ions in the layered material. This increased alkylation activity may be obtained by contacting the layered material with an aqueous solution of a sulfate compound such as sulfuric acid.Type: GrantFiled: November 21, 1990Date of Patent: April 14, 1992Assignee: Mobil Oil Corp.Inventors: Brent A. Aufdembrink, Charles T. Kresge, Quang N. Le, Joosup Shim, Stephen S. Wong
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Patent number: 5043508Abstract: Relatively long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively long chain alkylating agent under alkylation reaction conditions in the presence of a layered material as an alkylation catalyst. The layered material contains titanate in the layers and oxide pillars separating the layers. The layers also contain vacancies and/or metals incorporated therein. The degree of alkylation is a function of the interplanar d-spacing of the pillared material, which is, in turn a function of the chain length of the swelling agent used to prepare the layered material.Type: GrantFiled: February 23, 1990Date of Patent: August 27, 1991Assignee: Mobil Oil CorporationInventors: Brent A. Aufdembrink, Charles T. Kresge, Quang N. Le, Joosup Shim, Stephen S. Wong
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Patent number: 5034563Abstract: Long chain alkyl substituted naphthalenes are produced by the alkylation of naphthalene with an olefin or other alkylating agent possessing at least 6 carbon atoms, usually 12 to 20 carbon atoms, in the presence of an alkylation catalyst comprising a zeolite which contains cations having a radius of at least 2.5 .ANG.. Cations of this size may be provided by hydrated cations such as hydrated ammonium, sodium or potassium cations or by organoammonium cations such as tetraalkylammonium cations. The zeolite is usually a large pore size ze USY. The presence of the bulky cations in the zeolite increases the selectivity of the catalyst for the production of long chain mono-alkyl substituted naphthalenes in preference to more highly substituted products.Type: GrantFiled: April 6, 1990Date of Patent: July 23, 1991Assignee: Mobil Oil CorporationInventors: Henry Ashjian, Quang N. Le, David O. Marler, Joosup Shim, Stephen S. Wong
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Patent number: 5019670Abstract: The thermal and oxidative stability of HVI-PAO olefin oligomers is improved by alkylation in the presence of a solid, porous, acidic alkylation catalyst defined by a specific X-ray diffraction pattern. A preferred catalyst is the synthetic zeolite MCM-22. The olefinic oligomers used as alkylating agents are prepared from 1-alkene oligomerization in contact with a reduced metal oxide, preferably reduced chromium oxide, catalyst on support such as silica. Aromatics which may be used in the reaction include monocyclic aromatics such as benzene and toluene as well as bicyclic aromatics such as naphthalene. Substituted aromatics may be used in order to introduce functional groups such as hydroxyl groups into the products, for example by the use of hydroxyaromtics such as phenol or naphthaol.Type: GrantFiled: April 26, 1990Date of Patent: May 28, 1991Assignee: Mobil Oil CorporationInventors: Quang N. Le, Bruce P. Pelrine, Joosup Shim
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Patent number: 5008460Abstract: Synthetic lubricating oils having a predetermined alkylaromatic structure are prepared from a mixture of mono- or dialkenyl benzene with an aliphatic olefin by free-radical reaction in the presence of ditertiary-butyl peroxide, for example. Equivalent napthalene derivatives may be substituted for the dialkenyl benzene. The oils that are formed exhibit a high Viscosity Index, and a low pour point. The viscosity of the synthetic lube stock produced may be controlled by changing the amount of peroxide used.Type: GrantFiled: May 30, 1989Date of Patent: April 16, 1991Assignee: Mobil Oil Corp.Inventors: William E. Garwood, Quang N. Le, Joosup Shim, Stephen S. Wong
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Patent number: 4992185Abstract: A water-in-oil emulsion, having improved stability, is provided which comprises about 40 to 80 percent by weight of an oil of lubricating viscosity; about 10 to less than about 60 percent by weight water, said percentages based on the total weight of the emulsion; a water-in-oil emulsifier; and an emulsion stabilizing amount of a stabilizer selected from the group consisting of sulfurized diisobutylene, sulfurized triisobutylene and mixtures thereof.Type: GrantFiled: May 11, 1988Date of Patent: February 12, 1991Assignee: Mobil Oil CorporationInventor: Joosup Shim
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Patent number: 4962256Abstract: Long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a long chain alkylating agent in the presence of catalyst comprising a synthetic porous crystalline material characterized by an X-ray diffraction pattern including interplanar d-spacings at 12.36.+-.0.4, 11.03.+-.0.2, 8.83.+-.0.14, 6.18.+-.0.12, 6.00.+-.0.10, 4.06.+-.0.07, 3.91.+-.0.07 and 3.42.+-.0.06 Angstroms.Type: GrantFiled: January 25, 1990Date of Patent: October 9, 1990Assignee: Mobil Oil Corp.Inventors: Quang N. Le, David O. Marler, John P. McWilliams, Mae K. Rubin, Joosup Shim, Stephen S. Wong
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Patent number: 4912277Abstract: Relatively long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively long chain alkylating agent under alkylation reaction conditions in the pressure of a layered material as an alkylation catalyst. The layered material contains titanate in the layers and oxide pillars separating the layers. The layers also contain vacancies and/or metals incorporated therein.Type: GrantFiled: May 30, 1989Date of Patent: March 27, 1990Assignee: Mobil Oil CorporationInventors: Brent A. Aufdembrink, Charles T. Kresge, Quang N. Le, Joosup Shim, Stephen S. Wong
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Patent number: 4511481Abstract: Synthesized- and mineral-based industrial lubricants are stabilized with a triazole adduct of amine phosphates thereby providing excellent oxidation stability, antiwear and rust preventative performance for said industrial lubricants.Type: GrantFiled: August 31, 1983Date of Patent: April 16, 1985Assignee: Mobil Oil CorporationInventor: Joosup Shim
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Patent number: 4485026Abstract: Lubricating oils which in aqueous media are highly useful as, for example, hydraulic fluids, are provided having improved hard water stability characteristics when oil soluble alkylphenoxypolyethoxylated sulfonates are added thereto.Type: GrantFiled: September 30, 1982Date of Patent: November 27, 1984Assignee: Mobil Oil CorporationInventors: Kirk D. Schmitt, Joosup Shim
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Patent number: 4483777Abstract: Fire resistant hydraulic fluids comprising water in oil emulsions are stabilized with water soluble aminohydroxy compounds to provide superior high temperature emulsion stability.Type: GrantFiled: September 20, 1982Date of Patent: November 20, 1984Assignee: Mobil Oil CorporationInventor: Joosup Shim
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Patent number: 4456539Abstract: Oxidation in lubricants is reduced by adding to the lubricant a small portion of a triazole/dithiophosphate reaction product.Type: GrantFiled: July 29, 1982Date of Patent: June 26, 1984Assignee: Mobil Oil CorporationInventor: Joosup Shim
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Patent number: 4428855Abstract: High water content fluids, i.e. oil-in-water emulsion hydraulic fluids are stabilized and/or made resistant to hard water by a co-emulsifier system consisting of water soluble alkyl alkanol amines or a heterocyclic amine.Type: GrantFiled: August 25, 1982Date of Patent: January 31, 1984Assignee: Mobil Oil CorporationInventors: Derek A. Law, Joosup Shim
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Patent number: 4419251Abstract: A lubricant concentrate is provided for forming stable, translucent oil-in-water emulsions upon dilution with a major part of water. The concentrate comprises a suitble base oil with a combination emulsifier/dispersant system and antiwear/antirust inhibitor system. Typical emulsifier/dispersants include the metal soaps of rosin acids, the alkylene oxide condensation products of a fatty amine or the reaction product thereof with a polyalkenylsuccinic acid or anhydride. Zinc dialkyldithiophosphates and metal dialkylnaphthalene sulfonates are useful antiwear and antirust inhibitors.Type: GrantFiled: September 16, 1982Date of Patent: December 6, 1983Assignee: Mobil Oil CorporationInventors: Joosup Shim, Derek A. Law
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Patent number: 4419252Abstract: A lubricant concentrate is provided for forming stable, translucent oil-in-water emulsions upon dilution with a major part of water. The concentrate comprises a suitable base oil blended with polyisobutylene and an emulsifier/dispersant and antiwear/antirust inhibitor system. Typical emulsifier/dispersants include the metal soaps of rosin acids, the alkylene oxide condensation products of a fatty amine or the reaction product thereof with a polyalkenylsuccinic acid or anhydride. Zinc dialkyldithiophosphates and metal dialkylnaphthalene sulfonates are useful antiwear and antirust inhibitors.Type: GrantFiled: October 22, 1982Date of Patent: December 6, 1983Assignee: Mobil Oil CorporationInventor: Joosup Shim
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Patent number: 4264436Abstract: Soluble metal salts in used turbine/circulating oils are removed by treating the used oil with soluble triazole compounds and thereafter filtering or centrifuging said oil.Type: GrantFiled: February 15, 1980Date of Patent: April 28, 1981Assignee: Mobil Oil CorporationInventor: Joosup Shim
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Patent number: 4260501Abstract: Lubricant compositions containing oleaginous materials and, in an amount sufficient to impart oxidation stability and corrosion resistance thereto, an adduct of a benzotriazole compound and an alkyl vinyl ether or a vinyl ester of a carboxylic acid in combination with an alkyl dimercapto thiadiazole.Type: GrantFiled: May 11, 1979Date of Patent: April 7, 1981Assignee: Mobil Oil CorporationInventor: Joosup Shim