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| Number | Title | Issue Date |
| 5925284 | Shaped article and process for preparing the article Applicants have developed a unique process for preparing a shaped article comprising an ion exchange composition and a hydroxy oxide binder. The ion exchange compositions include metallotitanates, metallogermanates, pillared clays and metal phosphonates. ... | 07/20/1999 |
| 5906731 | Process for hydroprocessing hydrocarbons A hydroprocess catalyzed by a catalyst composition comprising a porous refractory oxide, a molybdenum component, a phosphorus component and an underbedded nickel component, the composition characterized by a Raman spectrum comprising at least one Raman ba... | 05/25/1999 |
| 5889186 | Process for preparation of the pharmaceutically desired (S)-oxetine enantiomers Improved processes for preparation of the (S)-oxetines in high enantiomeric purity centers on resolution using simulated moving bed chromatography of a racemic precursor early in the oxetine synthesis. Resolution is effected with high enantiomeric purity,... | 03/30/1999 |
| 5864051 | Selective oxidation catalyst process for preparing the catalyst and process using the catalyst A catalyst for the selective oxidation of alkanes and alkenes has been developed. The catalyst consists of a noble metal component such as platinum and a SbOx component. A unique feature of the catalyst is that the noble metal component is present as part... | 01/26/1999 |
| 5858209 | Catalytic reforming process with increased aromatics yield A processing step is added to an existing catalytic reforming unit to increase the yield of aromatic product. The additional processing comprises separation of product from the reforming unit into an aromatic concentrate and a low-octane recycle stream wh... | 01/12/1999 |
| 5858243 | Use of crystalline intergrowth molecular sieves for removing contaminant metal ions from liquid streams A process for removing contaminant metal ions from a liquid stream is disclosed. The process involves contacting the liquid stream with a crystalline molecular sieve which has a crystal structure which is an intergrowth of the pharmacosiderite and sitinak... | 01/12/1999 |
| 5856264 | Adsorbent for use in double glazed windows Novel, hollow, low-density agglomerates for use in sealed insulating glass windows to adsorb water vapor, and optionally organic materials, present in the cavity between the two glazings. These agglomerates provide sufficient but not excessive amounts of ... | 01/05/1999 |
| 5849977 | Metal cation-modified alkylation catalysts A process for the alkylation of alkenes having from 2 to 6 carbon atoms with an alkane having from 4 to 6 carbon atoms to afford an alkylate comprises reacting in the liquid phase the alkene and alkane under alkylation conditions in the presence of a nove... | 12/15/1998 |
| 5847393 | Control of gaseous hydrogen peroxide concentration during sterilization On line and essentially continuous measurements of hydrogen peroxide vapor in the presence of water vapor can be made using near infrared (NIR) spectroscopy using fiber optic cables to transmit infrared radiation between, e.g, a sterilization chamber and ... | 12/08/1998 |
| 5847392 | Determining the concentration of gaseous hydrogen peroxide On line and essentially continuous measurements of hydrogen peroxide vapor in the presence of water vapor can be made using near infrared (NIR) spectroscopy using fiber optic cables to transmit infrared radiation between, e.g, a sterilization chamber and ... | 12/08/1998 |
| 5837208 | Hydroprocessing reactor mixer/distributor Quench fluids being charged to a hydroprocessing reactor and liquid flowing downward within the reactor are admixed between the catalyst beds located in the reactor by an apparatus comprising three circular trays (16, 21, 22) and a mixing chamber (20). Th... | 11/17/1998 |
| 5824619 | Particulate cooling process with reduced thermal channeling A regeneration process is described that eliminates or greatly reduces thermal channelling in a cooling zone bed. The method controls the flow rate of cooling gas independently of the requirements of the regeneration process for combusting coke and for ha... | 10/20/1998 |
| 5811622 | Process for the production of dehydrogenated hydrocarbons A process for the dehydrogenation of a dehydrogenatable hydrocarbon by (1) contacting the dehydrogenatable hydrocarbon with a liquid alkali metal in a dehydrogenation zone to produce a stream containing a dehydrogenated hydrocarbon and an unconverted dehy... | 09/22/1998 |
| 5796251 | Process for controlling blending using nuclear magnetic resonance spectroscopy A process of controlling the blending of components to produce a product composition at a target value for least one characteristic has been developed. The process involves varying the proportion of the components, determining with each variation the chan... | 08/18/1998 |
| 5792338 | BTX from naphtha without extraction A hydrocarbon feedstock is catalytically reformed in a sequence comprising a continuous-reforming zone associated with continuous catalyst regeneration, a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic L-ze... | 08/11/1998 |
| 5780695 | Process for the selective saturation of olefin-containing halogenated organic streams A process for saturating an olefin-containing halogenated organic stream to produce saturated halogenated organic compounds while minimizing the hydrodehalogenation of the organic compounds.... | 07/14/1998 |
| 5770045 | Modified riser-reactor reforming process A catalytic reforming process uses a riser reactor with multiple catalyst injection points to obtain high aromatics yields from a naphtha feedstock. Product from the riser reactor typically is discharged into a fluidized-reforming reactor, in which the re... | 06/23/1998 |
| 5770042 | Upgrading of cyclic naphthas A process combination is disclosed to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. A naphtha feedstock is subjected to ring cleavage to convert naphthenes to paraffins using a nonacidic catalyst followed by... | 06/23/1998 |
| 5770078 | Phase separator apparatus to separate a mixture of liquids and finely divided suspended particles An apparatus for the separation of mixtures of liquids and finely divided suspended particles to produce a liquid product stream having a reduced concentration of finely divided suspended particles. The apparatus uses a generally vertical separator vessel... | 06/23/1998 |
| 5763730 | Process for alkane isomerization using reactive chromatography A process for the continuous isomerization of an alkane to produce an isomerized product through contacting the alkane with a simulated moving bed acting as a catalyst for isomerization and an adsorbent for the alkanes has been developed. The alkane may b... | 06/09/1998 |
| 5763728 | Recovery and recycle of HF-amine complex in HF alkylation An HF-agent complex, such as HF-pyridine complex where the complexing agent is pyridine, is recovered and recycled from a by-product containing stream in an alkylation process using the complex by (a) selectively removing a portion of the HF from the by-p... | 06/09/1998 |
| 5762888 | Process and apparatus for discharging particles and fluid from a flow channel A vessel arrangement and process for contacting a fluid reactant with a particulate catalyst in a plurality of flow channels and discharging fluid and particles from the flow channels. The particles are discharged axially from the bottom of the flow chann... | 06/09/1998 |
| 5762887 | Apparatus for controlling reaction temperatures A reactor arrangement and process for indirectly contacting a reactant stream with a heat exchange stream uses an arrangement of heat exchange plates to control temperature conditions by varying the heat transfer factor in different portions of a continuo... | 06/09/1998 |
| 5762882 | FCC separation apparatus with improved stripping In this invention a cyclonic separation apparatus discharges particulate solids and gaseous fluids into a separation vessel from a discharge opening of a central conduit and withdraws separated gaseous fluids from the separation vessel that contacts the c... | 06/09/1998 |
| 5763729 | Alkylation of alkanes with alkyl halides Although olefins commonly are used to alkylate alkanes using various solid acid catalysts, the process is severely hampered by short catalyst lifetimes attending substantial olefin oligomerization. This problem can be avoided by using an alkyl chloride as... | 06/09/1998 |
| 5759386 | Process for thioetherification and selective hydrogenation of light hydrocarbons A light hydrocarbon stream, such as a C3 -C5 stream recovered from an FCC unit, is catalytically treated for the selective hydrogenation of dienes and for the removal of mercaptans by thioetherification. The effluent of the reaction ... | 06/02/1998 |
| 5755956 | Stable, high-yield reforming catalyst A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing multiple Group VIII (8-10) noble metals having different gradients within the catalyst and a nonacidic large-pore molecular sieve.... | 05/26/1998 |
| 5750800 | Process for producing diisopropyl ether from propane An integrated process to produce diisopropyl ether from propane has been developed. In a first reaction zone the propane in a feedstock, after any hydrocarbons containing four or more carbon atoms are removed from the feedstock via fractionation, is dehyd... | 05/12/1998 |
| 5744682 | Alkylation process using a catalyst with non-uniform metal dispersion A novel catalyst for alkylating an alkene with an alkane to give an alkylate product has been developed. The catalyst comprises a refractory inorganic oxide on which is dispersed a Group VIII metal, a metal cation and the reaction product of a metal halid... | 04/28/1998 |
| 5744686 | Process for the removal of nitrogen compounds from an aromatic hydrocarbon stream This invention relates to a process for the removal of nitrogen compounds from an aromatic hydrocarbon stream comprising the nitrogen compounds by contacting the hydrocarbon stream with a selective adsorbent having an average pore size less than. about 5.... | 04/28/1998 |
| 5744684 | Process for alkane isomerization using reactive chromatography and reactive desorbent A process for isomerizing a mixture of alkanes containing pentanes and at least one alkane having from 6 to about 8 carbon atoms and no more than one methyl branch has been developed. The process includes: 1) separating the mixture in a first separation z... | 04/28/1998 |
| 5744673 | Activated zeolite beta and its use for hydrocarbon conversion The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentra... | 04/28/1998 |
| 5744683 | Process for continuous reaction and deparation using reactive chromatography A process for the continuous isomerization of an alkane to produce an isomerized product through contacting the alkane with a simulated moving bed acting as a catalyst for isomerization and an adsorbent for the alkanes has been developed. The alkane may b... | 04/28/1998 |
| 5744404 | Crystalline odor adsorbing zeolite delivery system Applicants have developed a process and an article for delivering or applying a zeolitic molecular sieve to an odorous surface. The process involves contacting the surface with a porous article which contains a slurry a zeolitic molecular sieve having a S... | 04/28/1998 |
| 5744645 | Two-stage process for producing diisopropyl ether using catalytic distillation A process for the efficient production of diisopropyl ether where catalytic distillation is used to increase the yield of product beyond thermodynamic equilibrium limitations has been developed. In a hydration zone the propylene in a feedstock is reacted ... | 04/28/1998 |
| 5744669 | Process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates A process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates to produce a stream comprising hydrogenated hydrocarbonaceous compounds free from organic nitrates and halogenated organic compounds by means of c... | 04/28/1998 |
| 5739074 | Metal cation-modified alkylation catalysts A catalytic composite of a refractory inorganic oxide whose bound surface hydroxyl group has reacted with a Friedel-Crafts type metal halide and whose acidity has been modified by the deposition of a monovalent metal cation, especially an alkali metal cat... | 04/14/1998 |
| 5733439 | Hydrocarbon conversion processes using substituted fluoride smectite clays Hydrocarbon conversion processes, e.g., alkylation, are disclosed and claimed which use as the catalyst novel fluoride containing substituted smectite clays. The clay has the formula Ax (My M'4-y)(Si8-x Mt... | 03/31/1998 |
| 5723710 | Zeolite beta and its use in aromatic alkylation There is disclosed a new form of zeolite beta which shows substantially greater stability and greater catalyst lifetime when used in the alkylation and transalkylation of aromatic compounds. The new, surface-modified zeolite beta is characterized by havin... | 03/03/1998 |
| 5723706 | Process for the treatment of halogenated organic feedstocks A process for the conversion of a halogenated organic feedstock to produce a stream of hydrocarbonaceous compounds having an exceedingly low concentration of halogenated organic compounds and an aqueous stream containing hydrogen halide.... | 03/03/1998 |
