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Assignee: Chevron Research Company


Location: SanFrancisco, CA
No. of patents: 1854

1                      
NumberTitleIssue Date
5603821Low-aluminum boron beta zeolite
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template....
02/18/1997
5593573Demetalation of hydrocarbonaceous feedstocks using sulfuric acid and salts thereof
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....
01/14/1997
5464623Process for pelletizing insecticidal N-hydrocarboyl phosphoroamidothioates and phosphoroamidodithioates
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...
11/07/1995
5409598Method of hydroprocessing
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 liqui...
04/25/1995
5393407Hydrocarbon conversion utilizing a low-aluminum boron beta zeolite
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template....
02/28/1995
5364546Lubricating oil compositions containing very long chain alkylphenyl poly(oxyalkylene) aminocarbamates
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 composit...
11/15/1994
5315053Normally liquid alpha-olefin oligomers useful as base stocks and viscosity index improvers, and lubricating oils containing same
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; and y represents the number of...
05/24/1994
5312965Lubricating oil composition containing substantially straight chain alkylphenyl poly(oxypropylene) aminocarbamates
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 a...
05/17/1994
5312460Fuel compositions containing substantially straight chain alkylphenyl poly (oxypropylene) amino carbamates
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 molec...
05/17/1994
5270018Apparatus for withdrawing a particulate solid from a packed, non-fluidized bed
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 th...
12/14/1993
5261461Pipeline rehabilitation articulated gasketed-joint pipe
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 pi...
11/16/1993
5246604Grease composition with improved extreme pressure and antiwear properties
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-pr...
09/21/1993
5246605Polyurea-based grease with metal borate and antimony additives
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-p...
09/21/1993
5238662Processes for recovering precious metals
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 ch...
08/24/1993
5177276Alpha-olefin oligomers useful as base stocks and viscosity index improvers, and lubricating oils containing same
An alpha-olefin oligomer consisting essentially of repeating units having the structural formula: ##STR1## wherein x represents an integer from 3 to 11, inclusive; and y represents the number of repeating units in the oligomer such that the weight av...
01/05/1993
5166111Low-aluminum boron beta zeolite
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template....
11/24/1992
5166112Isomerization catalyst and process for its use
The present invention is a process and a catalyst for isomerizing normal and slightly branched C4 to C7 hydrocarbons. The catalyst comprises a Group VIII metal on Beta zeolite....
11/24/1992
5160601Hydrocarbon conversion with octane-enhancing catalysts
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...
11/03/1992
5149421Catalytic dewaxing process for lube oils using a combination of a silicoaluminophosphate molecular sieve catalyst and an aluminosilicate zeolite catalyst
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 ...
09/22/1992
5141660Monoalkylamine complexes of borated alkyl catechols and lubricating oil compositions containing the same
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 engin...
08/25/1992
5135641Catalytic cracking process employing silica/alumina cogel catalysts
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 hea...
08/04/1992
5120425Use of zeolite SSZ-33 in hydrocarbon conversion processes
A crystalline zeolite SSZ-33 is prepared using a quaternary ion as a template wherein said zeolite is used in hydrocarbon conversion processes....
06/09/1992
5113375Method and apparatus for testing geophones
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 t...
05/12/1992
5108633Long chain aliphatic hydrocarbyl amine additives having an oxyalkylene hydroxy connecting group
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 ...
04/28/1992
5104486Alkenyl succinic anhydride composition
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 inve...
04/14/1992
5098230Method for withdrawing a particulate solid from a packed, fluidized bed
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 bott...
03/24/1992
5098554Expedient method for altering the yield distribution from fluid catalytic cracking units
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 (gasoli...
03/24/1992
5094991Slurry catalyst for hydroprocessing heavy and refractory oils
Group VIB metal sulfide slurry catalysts having a pore volume in the pore size range 10 to 300Å radius of at least 0.1 cc/g. Also, Group VIB metal sulfide catalysts having a surface area of at least 20 m2 /g. Suitable Group VIB metals are moly...
03/10/1992
5092988System for monitoring injection water quality using filtration, pressure regulation and mass measuring
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 an...
03/03/1992
5089461Chromium/tin mixture as sulfur dioxide oxidation promoter for FCC units
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....
02/18/1992
5087347Silicoaluminophosphate hydrocarbon conversion process using SM-3
A silicoaluminophosphate molecular sieve is disclosed and is characterized in that the P2 O5 to alumina mole ratio at the surface is about 0.80 or less, the P2 O5 to alumina mole ratio of the bulk is 0.96 or gre...
02/11/1992
5082986Process for producing lube oil from olefins by isomerization over a silicoaluminophosphate catalyst
The present invention relates to a process for producing a C20 + 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 molec...
01/21/1992
5076915Apparatus for removing suspended solids from a liquid
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...
12/31/1991
5071998Modified succinimides (III)
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 formul...
12/10/1991
5071807Hydrocarbon processing composition
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 pref...
12/10/1991
5059304Process for removing sulfur from a hydrocarbon feedstream using a sulfur sorbent with alkali metal components or alkaline earth metal components
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 conve...
10/22/1991
5055607Long chain aliphatic hydrocarbyl amine additives having an oxy-carbonyl connecting group
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 disp...
10/08/1991
5052490Permeability of fines-containing earthen formations by removing liquid water
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 wat...
10/01/1991
5053373Zeolite SSZ-32
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....
10/01/1991
5051163Nitrogen-tolerant cracking process
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 a...
09/24/1991
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