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| Number | Title | Issue Date |
| 6297406 | Production of phenol A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst comprising a mixed oxide of cerium and a Group IVB metal.... | 10/02/2001 |
| 6231749 | Production of high viscosity index lubricants Petroleum wax feeds are converted to high viscosity index lubricants by a two-step hydrocracking-hydroisomerization process in which the wax feed which exhibits branchingis initially subjected to hydrocracking under mild conditions with a conversion to no... | 05/15/2001 |
| 6190532 | Production of high viscosity index lubricants Petroleum waxes are converted to high viscosity index lubricants by a hydroisomerization process in which the wax feed is subjected to hydroisomerization over a low acidity molecular sieve isomerization catalyst (the molecular sieve being preferably a zeo... | 02/20/2001 |
| 5143876 | Preparation of hydroxyl-rich zeolites Zeolites (e.g. ZSM-5 and zeolite beta) enriched with hydroxyl groups are prepared by ammonia treatment of sieves which have suffered loss of tetrahedral aluminum from framework positions followed by careful calcination (200°-450° C.). The hydroxyl group... | 09/01/1992 |
| 5116523 | Sulfide adducts of high viscosity index polyalphaolefins Sulfur derivatives of unsaturated oligomers formed from alpha-olefins of 2 to 20 carbon atoms which oligomer has a branch ratio of less than 0.19.... | 05/26/1992 |
| 5062944 | Catalytic cracking process with multiple catalyst outlets An improved process and apparatus are disclosed for fluidized catalytic cracking of hydrocarbons using a cross-flow or swirl type catalyst regenerator. Instead of a single catalyst withdrawal outlet for regenerated catalyst, multiple catalyst withdrawal p... | 11/05/1991 |
| 5057235 | Sulfur-phosphorus adducts of chromium catalyzed polyalphaolefins Phosphorodithioate derivatives of oligomers of polyalphaolefins of high viscosity index for use as lubricants and lubricant additives is described.... | 10/15/1991 |
| 5039310 | Polyether substituted mannich bases as fuel and lubricant ashless dispersants Reaction products in which polyethers are grown from substituted phenol-containing mannich bases have been found to be effective ashless dispersants and detergents for fuels and lubricants.... | 08/13/1991 |
| 5034565 | Production of gasoline from light olefins in a fluidized catalyst reactor system A improved process is provided for upgrading light olefins from hydrocarbon cracking, such as light crackate gas containing ethene, propene and other C1 -C4 lower aliphatics. The process comprises the steps of: maintaining an oligome... | 07/23/1991 |
| 5026529 | Production of ethers from methanol Improved operating techniques and apparatus for converting methanol or the like to intermediate olefins and etherification products, such as methyl t-butyl ether, by extracting crude methanol feedstock with an olefinic liquid hydrocarbon stream containing... | 06/25/1991 |
| 5013329 | Conversion of light hydrocarbons to ether rich gasoline A process is disclosed for converting a light hydrocarbon feedstock that contains a mixture of linear and branched olefins to ether-rich high octane gasoline streams that include tertiary alkyl and isoalkyl ethers such as MTBE, TAME, methyl isopropyl ethe... | 05/07/1991 |
| 5009851 | Integrated catalytic reactor system with light olefin upgrading A catalytic reactor system for cracking heavy oil in a FCC vertical reactor with lift gas. Olefinic light cracking gas separated from the FCC effluent is upgraded in a catalytic reactor to increase gasoline production. Byproduct light paraffinic gas from ... | 04/23/1991 |
| 5008088 | Methanol-gas saturator for catalytic conversion system A process for introducing exothermic reactant vapor stream to an adiabatic catalyst zone comprising the steps of: preheating a volatile liquid exothermic reactant stream below its autogenous temperature under process pressure; contacting the preheated liq... | 04/16/1991 |
| 5006270 | Mixed resorcinol-hydroxyester borates as antioxidants Mixed resorcinol-hydroxyester borates have been found to be effective multifunctional additives when incorporated into various lubricating media.... | 04/09/1991 |
| 5000837 | Multistage integrated process for upgrading olefins An improvement in gasoline octane without substantial decrease in overall yield is obtained in an integrated process combining a fluidized catalytic cracking reaction and a low severity fluidized catalyst olefin oligomerization reaction when crystalline m... | 03/19/1991 |
| 5001292 | Ether and hydrocarbon production An integrated process is disclosed that substantially reduces the cost of producing MTBE and other alkyl tert-alkyl ethers by eliminating a major portion of the equipment and operating costs associated with the downstream processing of the etherification ... | 03/19/1991 |
| 4994197 | Triazole compositions as fuel and lube additives Triazole compounds are grafted onto alkyl or alkenyl succinimides by using diisocyanates to effect the coupling. The process is carried out by first reacting a 1,2,3 -triazole with a diisocyanate to produce a triazole substituted urea addition product con... | 02/19/1991 |
| 4994424 | Catalytic cracking process with improved flow in swirl regenerator An improved process and apparatus are disclosed for fluidized catalytic cracking of hydrocarbons using a swirl type catalyst regenerator. Multiple, symmetrically spaced spent catalyst inlets are provided for addition of coked catalyst to the regenerator. ... | 02/19/1991 |
| 4992607 | Petroleum refinery process and apparatus for the production of alkyl aromatic hydrocarbons from fuel gas and catalytic reformate A petroleum refinery process for the production of alkyl aromatic hydrocarbons from a C4- fuel gas containing light olefins including ethene and propene and catalytic reformate containing C6 to C8 aromatics. The... | 02/12/1991 |
| 4992616 | Heterogeneous isoparaffin/olefin aklylation process The quality of alkylate resulting from the alkylation of isoparaffin with olefin in the presence of an alkylation catalyst comprising a large pore zeolite, e.g., zeolite Beta, and a Lewis acid, e.g., BF3, is significantly improved by the presen... | 02/12/1991 |
| 4990710 | Tin-containing microporous crystalline materials and their use as dehydrogenation, dehydrocyclization and reforming catalysts Group VIII metal modified non-acidic tin containing microporous crystalline materials which in catalysis exhibit high selectively for dehydrogenation and dehydrocyclization are described.... | 02/05/1991 |
| 4990711 | Synthetic polyolefin lubricant blends having high viscosity indices Compositions and methods of preparation for a lubricant mixture having enhanced viscosity index comprising: (a) a low viscosity C20 -C60 lubricant range liquid comprising substantially linear hydrocarbons prepared by shape selective catal... | 02/05/1991 |
| 4990314 | Process and apparatus for two-phase fluid catalytic cracking system A fluid catalytic cracking (FCC) process and apparatus which employs relatively more elutriatable catalyst particles comprising intermediate pore zeolite, particularly ZSM-5, and relatively less elutriatable catalyst particles comprising large pore zeolit... | 02/05/1991 |
| 4988366 | High conversion TAME and MTBE production process Isopentene, or isoamylene, conversion to methyl tert-amyl ether can be substantially improved while high conversion of isobutylene to methyl tert-butyl ether can be maintained by carrying out the overall etherification process with alkanol in a staged man... | 01/29/1991 |
| 4985505 | Process of dispersion polymerization of butadiene in propane or butane Butadiene is polymerized alone or with a monomer such as styrene in a dispersion in propane, butane or its mixtures with minor amounts of other C4 -C6 alkanes, e.g., n-pentane and a dispersant which is preferably a styrene/hydrogenat... | 01/15/1991 |
| 4985203 | Conversion system for converting oxygenates to hydrocarbons Aliphatic oxygenates are converted to high octane gasoline by an integrated reactor system wherein three reaction zones are utilized. In a first reaction zone the oxygenates are directly converted to gasoline and an isobutane by-product. In a second react... | 01/15/1991 |
| 4983645 | Photoinitiators as light sensitive degradants for polyethylene Small effective amounts of camphorquinone incorporated into polyethylene accelerates the degradation of polyethylene on exposure to ultraviolet light.... | 01/08/1991 |
| 4983694 | Process for polymerizing olefins to form polymers of narrow molecular weight distribution An olefin, particularly alpha-olefin, supported catalyst composition, containing a transition metal or a compound thereof and an activator, has an average pore diameter of about 20 to about 300 Angstroms, at a substantially constant catalyst particle size... | 01/08/1991 |
| 4982031 | Alpha olefins from lower alkene oligomers Internally unsaturated near linear oligomers of lower olefins are converted into alpha olefins, or 1-alkenes, of essentially the same degree of linearity. The internally unsaturated olefins are the product of lower alkene oligomerization using a surface d... | 01/01/1991 |
| 4982028 | Dehydrogenation and dehydrocyclization catalyst Non-acid microporous crystalline indium containing materials are combined with Group VIII metal such as platinum to produce catalysts which exhibit high selectivity for dehydrocyclization of C5+ paraffins and which exhibit little, i... | 01/01/1991 |
| 4981520 | Oil reservoir permeability profile control with crosslinked welan gum biopolymers A composition capable of selectively plugging highly permeable zones in a subterranean formation. The composition forms a gel subsequent to its injection into the formation via an injection well. The composition comprises an aqueous solution of a welan gu... | 01/01/1991 |
| 4981491 | Production of ether-rich fuel Methanol or other alcohol is converted to high octane gasoline components by an integrated process wherein crude aqueous alcohol feedstock is extracted with a liquid extractant stream containing C4+ iso-olefin and reacted to form ter... | 01/01/1991 |
| 4980393 | Polymers for oil reservoir permeability control Improved polymer gels for oil reservoir permeability control have a continuous, cross-linked polymer phase having a relatively low density of cross-linking with domains of clustered, high density cross-linking. The clustered high density cross-linkings co... | 12/25/1990 |
| 4979617 | Dispensing system for severable sheet material A dispensing system for a package of a continuous, severable sheet material comprising a number of individual severable members, such as plastic bags, separated by transverse pre-weakened regions, such as perforations, is composed of a storage container h... | 12/25/1990 |
| 4980048 | Catalytic cracking process using cross-flow regenerator An improved process and apparatus are disclosed for fluidized bed catalyst regeneration in a cross-flow type regenerator. A baffled coked catalyst inlet located within the dense bed of catalyst disperses and distributes coked catalyst flow in a direction ... | 12/25/1990 |
| 4978440 | Quenched catalytic cracking process A fluidized catalytic riser cracking process is disclosed wherein a quench stream, preferably water or steam, is injected downstream of the riser reactor outlet to decrease the residence time and temperature of a majority of the hydrocarbons in a reactor ... | 12/18/1990 |
| 4975177 | High viscosity index lubricants Lubricant basestocks of high viscosity index, typically with V.I. of at least 130 or higher, and low pour point, typically below 5° F., are produced by hydroisomerizing petroleum waxes such as slack wax or de-oiled wax, over zeolite beta and then dewaxin... | 12/04/1990 |
| 4975097 | Iso-olefin etherification, upgrading and paraffin transhydrogenation A technique for converting olefinic light hydrocarbons to ether-rich liquid fuels and olefinic gasoline including etherification, olefin upgrading and transhydrogenation operations. The preferred process includes: reacting a fresh hydrocarbon stream conta... | 12/04/1990 |
| 4975401 | ZSM-5/ZSM-12 catalyst mixture for cracking alkylbenzenes There is provided a mixed catalyst of ZSM-5 and ZSM-12. Alkylbenzenes, especially heavy aromatic bottoms from cumene production, may be cracked over this mixed catalyst.... | 12/04/1990 |
| 4973790 | Process for upgrading light olefinic streams A process for oligomerizing C2 to C10 olefins obtained by catalytic cracking of heavy crude oil is disclosed. The olefins are oligomerized in the presence of added hydrogen over a shape selective zeolite to gasoline and distillate products. Feed pretreatm... | 11/27/1990 |
