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| Number | Title | Issue Date |
| 4481099 | Solvent extraction method A method is disclosed for solvent-extracting an extractable component from a mixture including the extractable component and subdivided solids, comprising: (a) maintaining a vertically extending bed comprising said solids in a vertically extending extract... | 11/06/1984 |
| 4417974 | Riser cracking of catalyst-deactivating feeds Conversion of a hydrocarbon feed containing a catalyst-deactivating component in a riser FCC cracking system can be increased by employing a baffle in the lower part of the riser to exclude a portion of the upwardly flowing catalyst from initial contact w... | 11/29/1983 |
| 4400314 | Method for the ultimate disposal of high level radioactive waste A method is disclosed for disposing of an aqueous solution of radioactive nuclides, in which the solution is diluted with formation water recovered from a subsea reservoir in a porous geological formation and, after dilution, the dilute solution is inject... | 08/23/1983 |
| 4359378 | Catalytic cracking process for improved octane A process is disclosed for converting hydrocarbons with a particulate catalyst containing a crystalline solid which has pore openings and maximum cage dimensions of 5.5-7.0 Angstroms; an active metal with both dehydrogenation activity and oxidation activi... | 11/16/1982 |
| 4332672 | Process for controlling sulfur oxides using an alumina-impregnated catalyst Sulfur oxides are removed from flue gas in a catalyst regenerator in a fluid catalyst cracking system while liquid-hydrocarbon product yield from the system is maintained at a high level by heating a nonzeolitic, silica-containing catalyst to 800°-1500°... | 06/01/1982 |
| 4331532 | Method for recovering bitumen from tar sand In recovering bitumen from tar sand by separation using an aqueous liquid, contamination of the aqueous phase with dispersed, finely divided solids is prevented by a mild heat treatment of the bituminous sand to reduce its water content before the sand is... | 05/25/1982 |
| 4325833 | Three-stage catalyst regeneration Coke-containing catalyst is regenerated in a three-stage system to provide complete coke removal while avoiding carbon monoxide and nitrogen oxides contamination of the flue gas formed in burning the coke.... | 04/20/1982 |
| 4317730 | Purification of aqueous liquids used in manganese nodule processing Fine particulate solids are removed from aqueous liquid previously employed in processing manganese nodules by subjecting the liquid to high gradient magnetic separation.... | 03/02/1982 |
| 4313848 | Method for removing coke from particulate catalyst Coke is removed from particulate catalyst by passing coke-containing catalyst downwardly through a regenerator without backmixing, in a countercurrent flow with respect to a regeneration gas having a limited free-oxygen content, so that nitrogen oxides ar... | 02/02/1982 |
| 4308076 | Method for cleaning heat exchangers in situ A feed-effluent heat exchanger in a sour water stripping system having sour water stripping means, sour water storage means, and a stripper feed-effluent heat exchanger, is cleaned when the stripped water pathway in the heat exchanger becomes fouled, by p... | 12/29/1981 |
| 4295936 | Fractionation apparatus providing improved heat recovery from bottom stream An energy efficient design of fractionation column in which the liquid at the column bottom must be cooled to prevent thermal degradation, the column being provided with a perforated annular baffle through which liquid from the lowermost tray is channeled... | 10/20/1981 |
| 4268376 | Cracking catalyst rejuvenation A process is disclosed for cracking hydrocarbons with a faujasite-type zeolite catalyst, in which the catalyst is rejuvenated by ion-exchange with rare earth metal cations to restore its activity.... | 05/19/1981 |
| 4266672 | Catalytic cracking with sepiolite A process is disclosed for cracking hydrocarbons by contacting the hydrocarbons with a catalyst composition comprising dispersed rods of fibrous form sepiolite and an inorganic oxide gel for binding the sepiolite rods.... | 05/12/1981 |
| 4259976 | Method for the recovery and transport of the chemical and energy value of light hydrocarbons Disclosed is an improved method for the recovery and transportation of the chemical and energy value of light hydrocarbons. Light, normally gaseous hydrocarbons are converted to methanol and mixed with a viscous hydrocarbon for transport in a pipeline.... | 04/07/1981 |
| 4260475 | Hydrocarbon cracking process A process for cracking hydrocarbons is disclosed in which catalyst particles are regenerated in two stages, the first employing an entrained bed of upwardly moving catalyst in cocurrent flow with regeneration gas, and the second employing a fluidized bed ... | 04/07/1981 |
| 4259176 | Restricting silica content of catalyst inventory to prevent alumina poisoning for SOx control Removal of sulfur oxides from cracking catalyst regenerator flue gas using particulate alumina is enhanced by employing a zeolitic cracking catalyst containing little or no silica in the catalyst matrix.... | 03/31/1981 |
| 4252635 | Sulfur oxides control in cracking catalyst regeneration In removing sulfur oxides from flue gas in a cracking catalyst regenerator in the presence of a silica-containing particulate catalyst by reacting the sulfur oxides with alumina in a particulate solid other than the catalyst, activity loss in the alumina ... | 02/24/1981 |
| 4239742 | Process for improving a gas containing a minor amount of sulfur dioxide impurity and producing a hydrogen sulfide-rich gas A process is provided for adsorbing sulfur dioxide impurity from an impure gas and producing a hydrogen sulfide-rich gas. In the process, a first adsorbate containing oxidized sulfur is produced by contacting the impure gas with an adsorbent comprising a ... | 12/16/1980 |
| 4238372 | Catalytic reforming catalyst An improved catalyst, having a reduced fouling rate when used in a catalytic reforming process, said catalyst comprising platinum disposed on an alumina support wherein the alumina support is obtained by removing water from aluminum hydroxide produced as ... | 12/09/1980 |
| 4238463 | Method for desulfurizing gases with iron oxide Removal of hydrogen sulfide from gases using iron oxide-containing solids is improved by introducing a liquid containing a primary or secondary amine into the iron oxide-containing solids.... | 12/09/1980 |
| 4204944 | Process for removing pollutants from nonzeolitic catalyst regenerator flue gas Carbon monoxide and sulfur oxides are removed from catalyst regenerator flue gas in an FCC system using a nonzeolitic cracking catalyst and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the crac... | 05/27/1980 |
| 4204945 | Removing pollutants from flue gas in nonzeolitic catalytic cracking Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the syst... | 05/27/1980 |
| 4199435 | NOx Control in cracking catalyst regeneration The amount of NOx formed during regeneration of a cracking catalyst in the presence of a metallic carbon monoxide combustion catalyst is decreased without substantially adversely affecting the carbon monoxide combustion activity of the promoter... | 04/22/1980 |
| 4191634 | Octane upgrading process for light paraffins using a combination of two palladium-zeolite catalysts The research octane of a light paraffinic hydrocarbon feed is effectively increased by consecutively contacting the feed under hydrocarbon conversion conditions with a palladium-HY-zeolite-alumina catalyst and then with a palladium-HZSM-5-zeolite-alumina ... | 03/04/1980 |
| 4189376 | Solvent extraction process A method is disclosed for solvent-extracting an extractable component from a mixture including the extractable component and subdivided solids, comprising: (a) maintaining a vertically extending bed comprising the solids in an extraction zone and introduc... | 02/19/1980 |
| 4187199 | Hydrocarbon conversion catalyst A composition useful in hydrocarbon conversion processes such as catalytic cracking is disclosed, comprising 0.05 to 10 weight percent lanthanum associated with a refractory support. The composition may also include 0.02 to 10 weight percent iron.... | 02/05/1980 |
| 4181705 | Purification of fluidized-bed combustion flue gas Nitrogen oxides levels in flue gas produced in fluidized-bed combustion systems are lowered by introducing ammonia directly into the fluidized bed.... | 01/01/1980 |
| 4166787 | Sulfur oxides control in catalytic cracking The amount of sulfur oxides in flue gas evolved in a catalyst regenerator in a catalytic cracking system is lowered by incorporating into the cracking catalyst, before using the catalyst in the cracking system, finely divided, high surface area alumina wh... | 09/04/1979 |
| 4165275 | Lowering sulfur oxide output from catalyst regeneration Sulfur oxides in flue gas formed during cracking catalyst regeneration are reacted with a zeolitic crystalline aluminosilicate containing sodium cations in the catalyst regenerator to form a sulfur-containing solid, and the sulfur component is removed fro... | 08/21/1979 |
| 4152298 | Catalyst for removing sulfur from a gas Sulfur oxides are removed from a gas and the sulfur is converted to hydrogen sulfide by the steps of: (1) reacting sulfur oxides in the gas with alumina to form a solid sulfur-containing compound and remove sulfur oxides from the gas; and (2) contacting t... | 05/01/1979 |
| 4152528 | Process for extracting phenol from phenol-water mixtures A process is provided for extracting phenol from phenol-water mixtures using a hydrocarbon-extracting medium having an improved extraction coefficient. The extracting medium comprises a mixture of a hydrocarbon component containing at least a substantial ... | 05/01/1979 |
| 4139441 | Electrofiltration with bi-directional potential pretreatment Electrofiltration, in which solids are removed from a liquid by adherence to surfaces of bodies maintained in an electrostatic field when the liquid is passed through the field, is improved by subjecting the liquid to pretreatment with an electrostatic fi... | 02/13/1979 |
| 4137151 | Hydrocarbon conversion with cracking catalyst having co-combustion promoters lanthanum and iron A composition useful in hydrocarbon conversion processes such as catalytic cracking is disclosed, comprising 0.05 to 10 weight percent lanthanum associated with a refractory support. The composition may also include 0.02 to 10 weight percent iron.... | 01/30/1979 |
| 4129497 | Hydrocarbon catalytic reforming process A method is provided for preparing a porous catalyst carrier having a pore volume of at least 0.5 cc/g, a content of micropores in which the pore diameter is between 80 and 150 A. which constitutes at least 70% of the pore volume and a content of macropor... | 12/12/1978 |
| 4115249 | Process for removing sulfur from a gas Sulfur oxides are removed from flue gas in a catalyst regenerator in a fluid catalyst cracking system while liquid-hydrocarbon product yield from the system is maintained at a high level by heating a particulate silica-containing cracking catalyst to 800-... | 09/19/1978 |
| 4115251 | Process for removing pollutants from catalyst regenerator flue gas Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the syst... | 09/19/1978 |
| 4115250 | Method for removing pollutants from catalyst regenerator flue gas Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the syst... | 09/19/1978 |
| 4071436 | Process for removing sulphur from a gas Sulfur oxides are removed from a gas and the sulfur is converted to hydrogen sulfide by the steps of: (1) reacting sulfur oxides in the gas with alumina to form a solid sulfur-containing compound and remove sulfur oxides from the gas; and (2) contacting t... | 01/31/1978 |
| 4062903 | Process for isomerizing alkylaromatics A process is disclosed for producing a selected C8 alkylaromatic isomer from a feedstock containing a less than equilibrium concentration of the selected isomer and a low C8 naphthenes concentration, in which the feedstock is first c... | 12/13/1977 |
| 4061592 | Hydrocarbon conversion catalyst A catalytic composition of matter comprising 0.01 to 5 weight percent of a platinum group component, 0.01 to 5 weight percent of a Group IIB component and 0.1 to 3 weight percent of a halogen in association with a porous solid carrier and processes for th... | 12/06/1977 |
