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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 4244922 | Hold-down device for vertically movable member in apparatus which contains contact material In an apparatus for contacting fluid with subdivided contact material, such as a radial-flow catalytic reactor, means having a substantially horizontal surface is attached to a lower portion of a vertically movable member within the reactor, the member be... | 01/13/1981 |
| 4243556 | Sulfur oxides control in cracking catalyst 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 ... | 01/06/1981 |
| 4241231 | Isomerization process for upgrading low-octane light paraffinic feeds using a chlorided platinum-alumina-rhenium catalyst Isomerizable light paraffinic hydrocarbon feeds are isomerized in an improved process using a particular super-chlorided reforming catalyst under isomerizing conditions. A chloride source in the feed stabilizes the catalyst. This process provides for a ma... | 12/23/1980 |
| 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 |
| 4224191 | High-copper-level comulled sulfur sorbent A porous sulfur sorbent, especially useful for removing residual H2 S and mercaptans from reformer feed streams, prepared by peptizing an alumina with acid, mulling the peptized alumina with a copper compound to form an extrudable dough, extrud... | 09/23/1980 |
| 4222854 | Catalytic reforming of naphtha fractions Production of motor gasoline and a BTX-enriched reformate by fractionating a naphtha feedstock into a mid-boiling BTX-precursor fraction, a relatively high-boiling fraction and a relatively low-boiling fraction; catalytically reforming the BTX-precursor f... | 09/16/1980 |
| 4207185 | Method for purifying liquids A method for separating a first liquid from a mixture with a second liquid or particulate solid by a series of froth flotation and froth separation stages is improved by recycling a portion of the mixture recovered upstream of the last flotation stage to ... | 06/10/1980 |
| 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 |
| 4204947 | Process for the removal of thiols from hydrocarbon oils Thiol impurities are absorbed and removed from hydrocarbon oils by contacting the oil in the absence of molecular oxygen with a scavenger at a temperature in the range of about 120° to 400° C. The scavenger is a composite having a copper component and a... | 05/27/1980 |
| 4205050 | Method of reducing corrosion in sour gas sweetening systems In a gas purification process wherein hydrogen sulfide is adsorbed by an alkanolamine solution in an absorption zone and desorbed in a regenerating column, the improvement comprising reducing corrosion in the overhead section of the column by introducing ... | 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 |
| 4201658 | Pour point depressant made from the asphaltene component of thermally treated shale oil A product useful as a pour point depressant which comprises the asphaltene component of a thermally treated shale oil is disclosed, as is a process for making it, a method for using it and a concentrate and a composition containing it.... | 05/06/1980 |
| 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 |
| 4199432 | Staged turbulent bed retorting process A continuous process is disclosed for the retorting of shale and other similar hydrocarbon-containing solids of a broad particle size distribution in which the solids to be retorted are introduced into an upper portion of an elongated vessel with a solid ... | 04/22/1980 |
| 4196175 | Process for removing a bisulfite salt from an aqueous solution by chemisorption A process is provided for removing a bisulfite salt from an aqueous solution by chemisorbing the salt onto a macroreticular organic compound containing carbonyl functional groups and regenerating the compound.... | 04/01/1980 |
| 4192736 | Removal of indigenous metal impurities from an oil with phosphorus oxide-promoted alumina Indigenous metal impurities in an oil are removed by contacting the oil with a novel solid consisting essentially of porous alumina containing a minor amount of phosphorus. The contacting is carried out under oil demetallizing conditions.... | 03/11/1980 |
| 4190519 | Combination process for upgrading naphtha A straight-run naphtha is fractionated at about 66° C., which is just below the boiling point of methylcyclopentane. The 66° C.+ fraction is reformed, and at least a portion of the reformate combined with the 66° C.- fraction and reacted under aromatiz... | 02/26/1980 |
| 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 |
| 4188280 | Method for removing arsenic from shale oil A combination process for reducing the soluble arsenic content of shale oil comprising thermally dearsenating the shale oil to make an aged shale oil, coking at least a portion of the aged shale oil, and catalytically hydroprocessing at least a portion of... | 02/12/1980 |
| 4188285 | Selective process for removal of thiophenes from gasoline using a silver-exchanged faujasite-type zeolite Thiophenes are selectively removed from gasoline by contact thereof with a silver-exchanged faujasite-type zeolite.... | 02/12/1980 |
| 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 |
| 4186111 | Stabilized aluminosilicate hydrocracking catalyst A process is described for producing gasoline from a paraffinic hydrocarbon feed wherein the feed is catalytically cracked and then reformed. In the process a novel porous hydrocracking catalyst composite is employed. This catalyst comprises a silica-alum... | 01/29/1980 |
| 4183800 | Indirect heat retorting process with cocurrent and countercurrent flow of hydrocarbon-containing solids A continuous process is disclosed for the retorting of oil shale or other similar hydrocarbon containing solids. Heat carrier particles at an elevated temperature are introduced into an upper portion of a retort and pass downwardly therethrough, fluidized... | 01/15/1980 |
| 4181599 | Naphtha processing including reforming, isomerization and cracking over a ZSM-5-type catalyst A straight-run naphtha is fractionated into a light naphtha fraction and a heavy naptha fraction containing methylcyclopentane and heavier hydrocarbons. The heavy fraction is reformed and the C5 -C6 paraffin portion of the reformate ... | 01/01/1980 |
| 4181596 | Process for treating hot shale oil effluent from a retort Oil shale retort effluent having a temperature of at least 650° F. (343° C.) is cooled, if necessary, to within the range from 600°-800° F. (316°-427° C.), separated into a liquid phase and a vapor phase, and the liquid phase is maintained within ... | 01/01/1980 |
| 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 |
| 4179361 | Sorbent regeneration in a process for removing sulfur-containing impurities from mineral oils Mineral oils containing minor or residual amounts of sulfur-containing impurities are upgraded by contact thereof with a cobalt oxide-supported sorbent under sulfur-sorbing conditions. The sorbent is regenerated by a set of sequential treatment steps.... | 12/18/1979 |
| 4177653 | Slush filtration method A method for separating collidal zeolite crystals from aqueous mother liquor solutions with conventional filtration apparatus by initially freezing the dispersion to a slush and conducting the filtration operation as the slush melts.... | 12/11/1979 |
| 4177158 | Method for producing an attrition-resistant adsorbent for sulfur dioxide, the resulting composition and a process using same A method is disclosed for producing attrition-resistant particles of dolomite or limestone by partially glazing the exterior of the particles with a suitable glaze-forming flux, the resulting composition being useful for removing sulfur dioxide from a com... | 12/04/1979 |
| 4172026 | Method for lowering the pour point of shale oil, and the resulting shale oil composition The pour point of a high-pour-point shale oil is lowered by mixing it with a low-pour-point whole shale oil. Both the method and the resulting composition are claimed.... | 10/23/1979 |
| 4171257 | Petroleum distillate upgrading process A petroleum distillate feed is upgraded and a substantial C3 -C4 olefin product fraction produced by contacting the feed with H-ZSM-5 zeolite at (1) a temperature in the 500°-800° F. range, (2) a pressure below about 13 atmospheres... | 10/16/1979 |
| 4171285 | Sulfur-reactive contact material having improved diffusion characteristics Sulfur-containing impurities are removed from a refined hydrocarbon feed by contact thereof with a porous sulfur-reactive agent having a pore volume of at least 0.15 cc per cc of which at least 5% is in pores having a diameter in the range 0.1 to 15 micro... | 10/16/1979 |
| 4170544 | Hydrocracking process including upgrading of bottoms fraction of the product An improved hydrocarbon hydrocracking process is disclosed wherein residual nitrogen-containing and/or polycyclic hydrocarbon impurities are extracted from bottoms of the resulting hydrocrackate by contacting the bottoms under liquid-liquid extracting con... | 10/09/1979 |
| 4169781 | Denitrification by furfural-ferric chloride extraction of coker oil A process is disclosed for denitrification of a hydrogenated oil, which is particularly applicable to coal-derived oils. The oil is first coked to yield a solid coke product and a coker oil having a reduced nitrogenous compound content. The coker oil nitr... | 10/02/1979 |
| 4169710 | Process for comminuting and reducing the sulfur and ash content of coal Coal may be effectively comminuted and the ash and sulfur content thereof reduced by contacting the coal with a hydrogen halide such as HF.... | 10/02/1979 |
| 4169040 | Staged process for the production of middle distillate from a heavy distillate Middle distillate oil is produced with a minimum production of lighter hydrocarbons by (1) contacting hydrogen gas and a heavy distillate oil containing nitrogenous hydrocarbons with a catalyst in a first reaction zone under selected conditions, and (2) c... | 09/25/1979 |
