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Chevron Research Company Patents
Assignee:
Chevron Research Company
Address:
San Francisco, CA
No. of patents:
1864
Patents:












Patent Number Title Of Patent Date Issued
RE32866 Method and apparatus for distributing fluids within a subterranean wellbore February 14, 1989
A method and apparatus for distributing fluids within a subterranean borehole wherein a submersible pump is introduced into the borehole at a first location. An intake port of the pump is connected to the first end of an intake duct having an unconnected second end located at a second
RE32489 Herbicidal substituted 2-(1-(oxyamino)-alkylidene)-cyclohexane-1,3-diones September 1, 1987
Substituted 2-[1-(oxyamino)alkylidene]-cyclohexane-1,3-diones have herbicidal activity against grassy weeds.
RE31559 Combination flyer-jumper associated with a geophysical data acquisition system and method of man April 17, 1984
The method and apparatus of the present invention are described in which connection (and disconnection) of a plurality of geophones associated with a digital seismic data acquisition system is greatly simplified without sacrificing flexibility as to the number of geophone flyers per stat
RE31089 Transducer system for continuous monitoring liquid levels in _storage tanks and the like November 23, 1982
The liquid level within a storage tank network is continuously monitored by a transducer system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including a differential pressure (dp) cell in circuit with a digital volt meter (DVM) which, in turn, is
RE30019 Production of hydrocarbons from underground formations June 5, 1979
A method for recovering hydrocarbons by injecting a mixture of oxidizing gas and steam into a lateral conduit in a hydrocarbon-containing formation to produce a product gas and, based on values contained in such gas, controlling the reactions between mixtures of oxidizing gas and steam a
RE29661 Sulfurized metal phenates June 6, 1978
A novel multifunctional lube oil additive is provided and comprising the reaction product of an alkyl phenol having from 8 to 35 carbons in the alkyl group, sulfur and an alkaline earth metal oxide or hydroxide. The reaction is performed in a two step process in the presence of a mutual
RE29459 Equilibration of lower alkyl substituted polyalkyl aromatic hydrocarbons with reduced disproport October 25, 1977
Disproportionation losses in the isomerization of C.sub.8 aromatic hydrocarbons are reduced by the use of silica-alumina catalyst composites with high surface areas and having .[.pore.]. .Iadd.most of its pore volume from pores of .Iaddend. radii .[.in the main.]. above about 45.degr
D281900 Lawn sprayer December 24, 1985
D281899 Garden sprayer December 24, 1985
D277853 Conference wireless microphone housing or the like March 5, 1985
5603821 Low-aluminum boron beta zeolite February 18, 1997
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.
5593573 Demetalation of hydrocarbonaceous feedstocks using sulfuric acid and salts thereof January 14, 1997
Sulfuric acids or salts thereof are used to remove metals, particularly organically-bound calcium, from hydrocarbonaceous feedstocks. An aqueous solution of the acid or its salts is used to extract the metals from the feedstock prior to processing.
5464623 Process for pelletizing insecticidal N-hydrocarboyl phosphoroamidothioates and phosphoroamidodit November 7, 1995
Insecticidal pellet compositions of N-hydrocarboyl phosphoroamidothioates and phosphoroamidodithioates are provided. These compositions have improved odor control, thermal stability, attrition resistance, bulk density and handling characteristics over the powdered forms of the insect
5409598 Method of hydroprocessing April 25, 1995
On-stream catalyst replacement hydroprocessing method wherein an upstream mixture of hydrogen and hydrocarbon liquid counter flows through a downwardly moving bed of hydroprocessing catalyst in a reactor vessel. The mixed feed stream of hydrogen and liquid hydrocarbon components enters a
5393407 Hydrocarbon conversion utilizing a low-aluminum boron beta zeolite February 28, 1995
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.
5364546 Lubricating oil compositions containing very long chain alkylphenyl poly(oxyalkylene) aminocarba November 15, 1994
Disclosed are alkylphenyl poly(oxyalkylene) aminocarbamates having at least one basic nitrogen and an average molecular weight of about 800 to 6,000 and wherein the alkyl group contains at least 40 carbon atoms. Also disclosed are lubricating oil compositions and concentrates containing
5315053 Normally liquid alpha-olefin oligomers useful as base stocks and viscosity index improvers, and May 24, 1994
A lubricating oil composition comprising a normally liquid alpha-olefin oligomer consisting essentially of repeating units having the structural formula: ##STR1## wherein x represents an integer from 3 to 11, inclusive; andy represents the number of repeating units in the oligomer su
5312965 Lubricating oil composition containing substantially straight chain alkylphenyl poly(oxypropylen May 17, 1994
Disclosed are alkylphenyl poly(oxypropylene) aminocarbamates having at least one basic nitrogen and an average molecular weight of about 600 to 6,000 and wherein the alkyl group is substantially straight-chain of at least 15 carbon atoms. Also disclosed are lubricating oil compositions a
5312460 Fuel compositions containing substantially straight chain alkylphenyl poly (oxypropylene) amino May 17, 1994
Disclosed is a fuel composition comprising a hydrocarbon boiling in the gasoline or diesel range and from about 30 to about 5,000 parts per million of an alkylphenyl poly(oxypropylene) aminocarbamate having at least one basic nitrogen and an average molecular weight of about 600 to 6
5270018 Apparatus for withdrawing a particulate solid from a packed, non-fluidized bed December 14, 1993
Apparatus for withdrawing particulate spent catalyst particles from a packed, non-fluidized bed of such particles in contact with a liquid medium within a vessel wherein the apparatus is a withdrawal conduit or pipe which has an inlet that opens within the bottom of the bed and faces
5261461 Pipeline rehabilitation articulated gasketed-joint pipe November 16, 1993
A liner pipe comprising sections of polyethylene pipe connected by articulated gasketed joints of bell and spigot design which are specifically adapted for ease of compression lining of large diameter pipe with minimum disruption to surface traffic and pipeline flow.
5246605 Polyurea-based grease with metal borate and antimony additives September 21, 1993
Disclosed is a grease composition comprising a major amount of a lubricating oil base vehicle, a polyurea gellant in an amount sufficient to thicken the base vehicle to grease consistency, an alkali-metal borate in an amount sufficient to impart extreme-pressure properties to the gre
5246604 Grease composition with improved extreme pressure and antiwear properties September 21, 1993
Disclosed is a grease composition comprising a major amount of a lubricating oil base vehicle, a lithium gellant in an amount sufficient to thicken the base vehicle to grease consistency, an alkali-metal borate in an amount sufficient to impart extreme-pressure properties to the grease
5238662 Processes for recovering precious metals August 24, 1993
Disclosed is a process for recovering precious metals using a combination of smelting and an effective utilization of molten salt chlorination. More specifically, disclosed is a process including the steps of (i) contacting, for example, a matte with a chloride salt containing at least
5177276 Alpha-olefin oligomers useful as base stocks and viscosity index improvers, and lubricating oils January 5, 1993
An alpha-olefin oligomer consisting essentially of repeating units having the structural formula: ##STR1## wherein x represents an integer from 3 to 11, inclusive; andy represents the number of repeating units in the oligomer such that the weight average molecular weight is from abou
5166112 Isomerization catalyst and process for its use November 24, 1992
The present invention is a process and a catalyst for isomerizing normal and slightly branched C.sub.4 to C.sub.7 hydrocarbons. The catalyst comprises a Group VIII metal on Beta zeolite.
5166111 Low-aluminum boron beta zeolite November 24, 1992
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.
5160601 Hydrocarbon conversion with octane-enhancing catalysts November 3, 1992
Novel hydrocarbon conversion catalysts and methods for their preparation are disclosed. The catalysts are particularly appropriate for the conversion of hydrocarbon feeds to high octane gasoline, while increasing light cycle oil and decreasing heavy cycle oil yield. The catalyst comp
5149421 Catalytic dewaxing process for lube oils using a combination of a silicoaluminophosphate molecul September 22, 1992
The present invention relates to a process for catalytically dewaxing a hydrocarbon oil feedstock by contacting the feedstock with a combination of a catalyst comprising an intermediate pore size silicoaluminophosphate molecular sieve and a hydrogenation component and an intermediate por
5141660 Monoalkylamine complexes of borated alkyl catechols and lubricating oil compositions containing August 25, 1992
Borated alkyl catechols can be stabilized by the addition of certain defined monoalkylamines.Lubricating oils containing a borated alkyl catecholmonoalkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.
5135641 Catalytic cracking process employing silica/alumina cogel catalysts August 4, 1992
Novel hydrocarbon conversion catalysts and methods for their preparation and use are disclosed. The catalysts are particularly appropriate for the conversion of hydrocarbon feeds to high octane gasoline, while increasing light cycle oil and decreasing heavy cycle oil yield. The catalyst
5120425 Use of zeolite SSZ-33 in hydrocarbon conversion processes June 9, 1992
A crystalline zeolite SSZ-33 is prepared using a quaternary ion as a template wherein said zeolite is used in hydrocarbon conversion processes.
5113375 Method and apparatus for testing geophones May 12, 1992
A LCD display is driven by certain elements to indicate the responses of a geophone to various tests as a waveform. Waveforms are displayed for an impulse tests, wherein a current pulse is applied to the geophone and the response is displayed, and for a tap test, wherein the top of a geo
5108633 Long chain aliphatic hydrocarbyl amine additives having an oxyalkylene hydroxy connecting group April 28, 1992
Long chain aliphatic hydrocarbyl amine additives which comprise a long chain aliphatic hydrocarbyl component, an amine component and an oxy-alkylene hydroxy connecting group connecting the aliphatic hydrocarbyl component and amine component are useful as deposit control additives in
5104486 Alkenyl succinic anhydride composition April 14, 1992
An improved liquid alkenyl succinic anhydride composition having superior paper sizing properties. There is also disclosed a method for the sizing of paper and a method for imparting water-repellency to cellulosic fabrics using the composition of the invention.
5098554 Expedient method for altering the yield distribution from fluid catalytic cracking units March 24, 1992
A fluid catalytic cracking unit equipped with multiple feed injection points along the length of the riser is operated such that all of the fresh feed is charged to one of different feed injection points, depending on the ratio of light distillate (gasoline) to middle distillate (light
5098230 Method for withdrawing a particulate solid from a packed, fluidized bed March 24, 1992
A method is disclosed for withdrawing particulate spent catalyst particles from a packed, non-fluidized bed of such particles in contact with a liquid medium within a vessel having a withdrawal conduit or pipe which has an inlet that opens within the bottom of the bed and faces generally
5094991 Slurry catalyst for hydroprocessing heavy and refractory oils March 10, 1992
Group VIB metal sulfide slurry catalysts having a pore volume in the pore size range 10 to 300.ANG. radius of at least 0.1 cc/g. Also, Group VIB metal sulfide catalysts having a surface area of at least 20 m.sup.2 /g. Suitable Group VIB metals are molybdenum and tungsten, preferably
5092988 System for monitoring injection water quality using filtration, pressure regulation and mass mea March 3, 1992
An apparatus for testing water quality for subsurface injection that provides for samples of infinite volume to be passed over a membrane filter at a constant pressure. The apparatus uses a positive displacement pump drawing suction on the water source and discharging to a membrane f
5089461 Chromium/tin mixture as sulfur dioxide oxidation promoter for FCC units February 18, 1992
Controlling sulfur oxide emissions from FCC regenerator flue gas by mixing a sulfur sorbent in the circulating inventory and having present in the regeneration zone a chromium/tin sulfur dioxide oxidation promoter.
5087347 Silicoaluminophosphate hydrocarbon conversion process using SM-3 February 11, 1992
A silicoaluminophosphate molecular sieve is disclosed and is characterized in that the P.sub.2 O.sub.5 to alumina mole ratio at the surface is about 0.80 or less, the P.sub.2 O.sub.5 to alumina mole ratio of the bulk is 0.96 or greater and the silicon content at the surface is greater th
5082986 Process for producing lube oil from olefins by isomerization over a silicoaluminophosphate catal January 21, 1992
The present invention relates to a process for producing a C.sub.20 + lube oil from olefins or reducing the pour point of a lube oil comprising isomerizing the olefins over a catalyst comprising an intermediate pore size silicoaluminophosphate molecular sieve and at least one Group VIII
5076915 Apparatus for removing suspended solids from a liquid December 31, 1991
Disclosed is a gravity settler for separating finely divided solids such as coal fines from a liquid such as a mixture of coal oil and agglomerating agent by agglomeration. A feed slurry comprising finely divided solids and a liquid mixture of product oil and an agglomerating agent is di
5071998 Modified succinimides (III) December 10, 1991
Disclosed herein are additives which are useful as dispersants and detergents in lubricating oils. In particular, this invention is directed toward polyamino alkenyl or alkyl succinimides which have been modified by treatment with a compound of the formula: ##STR1## wherein W is
5071807 Hydrocarbon processing composition December 10, 1991
A composition useful for processing hydrocarbonaceous feedstocks is disclosed comprising a mixture of a calcium/magnesium-containing material and a magnesium-containing material. The preferred calcium/magnesium-containing material is dolomite and the preferred magnesium-containing ma
5059304 Process for removing sulfur from a hydrocarbon feedstream using a sulfur sorbent with alkali met October 22, 1991
A process is disclosed for removing sulfur from a naphtha feedstream comprising contacting a naphtha feed with a platinum on alumina sulfur conversion catalyst under mild reforming conditions so that thiophenic and other organic sulfur compounds are converted to hydrogen sulfide without
5055607 Long chain aliphatic hydrocarbyl amine additives having an oxy-carbonyl connecting group October 8, 1991
Long-chain aliphatic hydrocarbyl polyamino additives which comprise a long-chain aliphatic hydrocarbyl moiety, a polyamino moiety and an oxy-carbonyl connecting group which joins the aliphatic hydrocarbyl moiety and the polyamino moiety are useful as dispersants in fuel compositions
5053373 Zeolite SSZ-32 October 1, 1991
A crystalline zeolite SSZ-32 of novel composition is prepared using an N-lower alkyl-N'-isopropyl-imidazolium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-32.
5052490 Permeability of fines-containing earthen formations by removing liquid water October 1, 1991
A method is disclosed for improving the effectiveness of fluid transport in a petroleum reservoir. That method comprises increasing the permeability of a portion of the reservoir by removing liquid water from that portion by evaporating off the liquid water. Preferably, substantially all
5051163 Nitrogen-tolerant cracking process September 24, 1991
A process is disclosed for reducing the impact of basic compounds, such as nitrogen, on hydrocarbonaceous feed intended for catalytic cracking. In a preferred embodiment, a portion of the regenerated catalyst of a catalytic cracking process is separated and contacted with the hydrocarbon

 
 
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