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| Number | Title | Issue Date |
| 5871635 | Hydroprocessing of petroleum fractions with a dual catalyst system Hydrocarbonaceous feedstocks admixed with a flow-through catalyst and hydrogen are hydroprocessed in a hydroprocessing reactor containing a captive hydroprocessing catalyst. The flow-through catalyst is continually withdrawn with the hydroprocessed feed f... | 02/16/1999 |
| 5858213 | Monitoring for coke formation during hydrocarbon feed processing Incipient coke formation during hydrocarbon processing operations is detected by monitoring for C6- -fractions in heated hydrocarbon materials. The amount of C6- -fraction is an indication of the coke-forming tendency of the hydrocar... | 01/12/1999 |
| 5846405 | Process oils and manufacturing process for such using aromatic enrichment and two pass hydrofinishing A method for producing a process oil is provided in which an aromatic extract oil is added to a napthenic rich feed. The combined feed is then hydrotreated in a first hydrotreating stage to convert at least a portion of sulfur and nitrogen in the feed to ... | 12/08/1998 |
| 5824208 | Short contact time catalytic cracking process Disclosed is a catalytic cracking process which incorporates a short contact time catalytic cracking step. The short contact time cracking step provides for an overall increase in distillate quality as well as provides for an overall increase in the quant... | 10/20/1998 |
| 5807478 | Bitumen modification using fly ash derived from bitumen coke A method for lowering the viscosity and specific gravity of a heavy hydrocarbon to render it pipelineable is disclosed. The method comprises adding a vanadium and nickel containing coke fly ash to the heavy hydrocarbon; reacting the heavy hydrocarbon in t... | 09/15/1998 |
| 5799877 | Fluid distribution across a particulate bed A means and method for spraying liquid and gas onto and across a particulate bed includes a horizontal liquid distribution tray disposed over the bed containing a plurality of gas and liquid spray distributors extending through the tray. The distributors ... | 09/01/1998 |
| 5740834 | Reverse angle integrally counter-weighted trickle valve A trickle valve useful for removing solids from the bottom of a cyclone separator dipleg includes a valve seat and a reverse angle, integrally counter-weighted flapper plate pivotally mounted on the valve and closed against the valve seat which opens to r... | 04/21/1998 |
| 5658862 | Engine oil with improved fuel economy properties (law372). A lubricating oil composition having improved fuel economy and fuel economy retention property which comprises a lubricating oil basestock, a boron containing alkenyl succinimide, molybdenum, di-thiocarbamate and/or molybdenum dithiophosphate, calcium and... | 08/19/1997 |
| 5632785 | Fuel economy additives A method for reducing fuel consumption in an internal combustion engine comprises operating said engine on a fuel composition comprising a major amount of fuel and a minor amount of an additive comprising an ester of a polyhydric polyether having ether ox... | 05/27/1997 |
| 5631212 | Engine oil A lubricating oil composition having improved fuel economy, wear resistance and antioxidancy properties which comprise a lubricating oil basestock, an oil-soluble copper salt, an oil-soluble molybdenum salt, a Group II metal salicylate and a borated polya... | 05/20/1997 |
| 5591411 | Catayltic cracking apparatus Disclosed is a fluid catalytic cracking apparatus. The apparatus includes means for decreasing and increasing the slip velocity of a hydrocarbon reaction stream to further enhance catalytic cracking of the hydrocarbon within the reaction stream. The appar... | 01/07/1997 |
| 5585335 | Imide and pyrrolidone grease thickeners with terephthalate complexing agent A grease composition comprises an effective amount of a lubricating oil containing an imide or pyrrolidone thickening agent or an imide or pyrrolidone thickening agent comprising a metal salt of a carboxylic acid in combination with a bimetal phthalate co... | 12/17/1996 |
| 5365006 | Process and apparatus for dehydrogenating alkanes An alkane-containing feedstream is passed through one or more tubes, which may contain alkane-dehydrogenation catalyst, immersed in a bed of fluidized particles. The bed is at an elevated temperature which maintains the temperature within the tube(s) at a... | 11/15/1994 |
| 5250181 | Process for removing elemental sulfur from fluids A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The fluids are contacted with an aqueous solution containing caustic, an aliphatic mer... | 10/05/1993 |
| 5199978 | Process for removing elemental sulfur from fluids The present invention provides a process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The sulfur-containing fluids are mixed with an inorgani... | 04/06/1993 |
| 5200062 | Process for removing elemental sulfur from fluids A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The fluids are contacted with a soluble quaternary ammonium hydroxide and preferably a... | 04/06/1993 |
| 5200063 | Coal hydroconversion process comprising solvent enhanced pretreatment with carbon monoxide This invention is directed to a staged process for producing liquids from coal or similar carbonaceous feeds combining a pretreatment stage and a liquefaction stage. In the process, the feed is dispersed in an organic solvent and reacted with carbon monox... | 04/06/1993 |
| 5160045 | Process for removing elemental sulfur from fluids A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines for the transportation of sour hydrocarbon streams. The fluids are contacted with an aqueous solution containing caustic, sulfide and opti... | 11/03/1992 |
| 5102427 | Middle distillate fuel having improved low temperature flow properties The present invention provides for a middle distillate fuel having a boiling range within about 120° to about 400° C. which has enhanced low temperature flow properties. These enhanced properties are provided by the addition of a mixture comprising: a) ... | 04/07/1992 |
| 5098680 | Aqueous ammonia injection scheme An improved process for reducing nitrogen oxide emissions to the atmosphere comprises the injection of ammonia vapor, formed by the vaporization of an aqueous ammonia solution, into a combustion effluent. A dilute aqueous ammonia phase, produced by such v... | 03/24/1992 |
| 5094666 | Composition for improving cold flow properties of middle distillates A wax-containing middle distillate, such as diesel fuel, having improved low temperature flow properties comprises three or more components including (A) an oil-soluble ethylene backbone flow improving polymer such as ethylene vinyl acetate copolymer, (B)... | 03/10/1992 |
| 5092908 | Composition for improving cold flow properties of middle distillates (OP-3571) A wax-containing middle distillate, such as diesel fuel, having improved low temperature flow properties comprises three or more components including (A) an oil-soluble ethylene backbone flow improving polymer such as ethylene vinyl acetate copolymer, (B)... | 03/03/1992 |
| 5076945 | Lubricating oil containing ashless non-phosphorus additive A lubricating oil composition having improved antiwear, antioxidation, and extreme pressure performance comprises a lubricating oil and a long chain hydrocarbyl amine, such as tallow amine, salt or amide of a derivative of benzoic acid or dithiobenzoic ac... | 12/31/1991 |
| 5037532 | Slurry hydrotreating process A slurry hydrotreating process is described in which a hydrotreating catalyst of small particle size is contacted with a heavy fossil fuel. High catalyst activity is maintained by circulating the catalyst between a hydrotreating zone and a reactivating zo... | 08/06/1991 |
| 5026475 | Coal hydroconversion process comprising solvent extraction (OP-3472) An improved process for the hydroconversion of coal comprising pretreating coal in an aqueous carbon monoxide-containing environment, followed by extracting a soluble hydrocarbon material from the coal, and subsequently hydroconverting the extracted mater... | 06/25/1991 |
| 4988434 | Removal of metallic contaminants from a hydrocarbonaceous liquid A method of reducing the concentration of metal contaminants, such as vanadium and nickel, in a petroleum distillate or other hydrocarbonaceous liquid is disclosed. The method comprises demetallizing the distillate over an activated-carbon supported vanad... | 01/29/1991 |
| 4985135 | Surface silylated zeolite cataysts, and processes for the preparation, and use of said catalysts in the production of high octane gasoline A novel zeolite hydrocracking catalyst which contains NH4+ sites, at ambient temperatures, and surface sites constituted of a chemisorbed silica-containing species, and process for producing said catalyst. The process for preparation... | 01/15/1991 |
| 4983297 | Waste water treating process scheme Waste water, such as water separated from crude oil at a production well which comprises an alkali metal component, a Group II A metal component, organic pollutants and insoluble oils and solids, is treated by the sequential steps of oils and solids remov... | 01/08/1991 |
| 4956161 | Process for removing SO from a gaseous mixture (OP-3409) A gas desulfurization process is provided in which a gaseous mixture comprising sulfur oxides is contacted in an absorption zone, at absorption conditions, with an aqueous composition comprising ammonium carbonate, or ammonium bicarbonate or mixtures ther... | 09/11/1990 |
| 4954247 | Process for separating hydrocarbons A process for improving the separation of a hydrocarbonaceous oil is provided, in which the oil is separated into fractions in an atmospheric distillation zone. The heavy bottoms fraction (atmospheric residuum) is split into two streams. One stream is pas... | 09/04/1990 |
| 4943672 | Process for the hydroisomerization of Fischer-Tropsch wax to produce lubricating oil (OP-3403) Fischer-Tropsch wax is converted to a lubricating oil having a high viscosity index and a low pour point by first hydrotreating the wax under relatively severe conditions and thereafter hydroisomerizing the hydrotreated wax in the presence of hydrogen on ... | 07/24/1990 |
| 4923841 | Catalyst for the hydroisomerization and hydrocracking of waxes to produce liquid hydrocarbon fuels and process for preparing the catalyst A fluorided platinum-on-alumina catalyst for wax isomerization wherein the platinum is substantially uniformly distributed throughout the catalyst in the form of relatively small crystallites, of the total fluoride present in the catalyst very little is l... | 05/08/1990 |
| 4919786 | Process for the hydroisomerization of was to produce middle distillate products (OP-3403) A process for selectively producing middle distillate fuel products from paraffin waxes such as slack wax and Fischer-Tropsch wax by hydroisomerizing the wax to convert 60-95 weight percent per pass of the 700° F.+ fraction contained in said w... | 04/24/1990 |
| 4919794 | Process for separating hydrocarbons A process for improving the separation of a hydrocarbon mixture is provided in which the hydrocarbon mixture is separated into fractions in a distillation zone. A liquid fraction and a portion of the vapor phase fraction are removed from the distillation ... | 04/24/1990 |
| 4906599 | Surface silylated zeolite catalysts, and processes for the preparation, and use of said catalysts in the production of high octane gasoline A novel zeolite hydrocracking catalyst which contains NH4+ sites, at ambient temperatures, and surface sites constituted of a chemisorbed silica-containing species, and process for producing said catalyst. The process for preparation... | 03/06/1990 |
| 4875992 | Process for the production of high density jet fuel from fused multi-ring aromatics and hydroaromatics A process for the conversion of a feed rich in fused two-ring aromatic and fused two-ring hydroaromatic hydrocarbons, notably light cat cycle oil, furnance oils, coal liquids, tar sands liquids, shale oil liquids, and the like to high density jet fuels. S... | 10/24/1989 |
| 4836829 | Fuel composition and process for multi-port fuel injection systems (PNE-509) Vehicle driveability problems associated with deposits formed in multiport fuel injectors are alleviated by delivering fuel comprising a particular amine containing various C6 to C24 alkyl, aryl, cycloaliphatic, heterocyclic, substit... | 06/06/1989 |
| 4832819 | Process for the hydroisomerization and hydrocracking of Fisher-Tropsch waxes to produce a syncrude and upgraded hydrocarbon products A process for producing a pumpable syncrude from a Fischer-Tropsch wax by fractionating the wax into relatively low boiling fraction containing oxygenate compounds and a relatively high boiling fraction which is substantially free of oxygenate compounds a... | 05/23/1989 |
| 4831003 | Catalyst composition and process of making A catalyst composition prepared by depositing a metal or metal compound onto a carbon support formed, in effect, simultaneously with the deposition of the metal or metal compound via partial combustion of an unsaturated hydrocarbon and thereafter converti... | 05/16/1989 |
| 4828676 | Process for the production of ultra high octane gasoline, and other fuels from aromatic hydrocrackates A process for the production of high octane gasoline, or high octane gasoline blending components from a sulfur and nitrogen-containing feed composition of wide boiling range rich in fused multi-ring aromatic hydrocarbons containing two, and three or more... | 05/09/1989 |
