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| Number | Title | Issue Date |
| 6080303 | Zeolite catalyst activity enhancement by aluminum phosphate and phosphorus The present invention provides a process for improving the catalytic activity of small and medium pore acidic zeolite catalyst which comprises the steps of treating a zeolite with a phosphorus compound to form a phosphorus treated zeolite and combining th... | 06/27/2000 |
| 6074975 | Hydrocarbon conversion catalyst composition and processes therefor and therewith A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C6 to C8 aromatic hydrocarbons such as toluene and xylene... | 06/13/2000 |
| 6074973 | Catalyzed hydrocarbon trap material and method of making the same A catalyzed hydrocarbon trap material washcoat (20) used in a trap (10), which may be placed downstream of a conventional catalyst member (28), is useful for treating internal combustion engine (22) exhaust. Trap (10) traps hydrocarbons during cold operat... | 06/13/2000 |
| 6071844 | Method of producing &3xb5;-Caprolactam, MFI zeolite catalysts on whose surface symmetrically arranged OH groups are present and to a method of producing them A method of producing &3xb5;-caprolactam from cyclohexanone in the gaseous phase using MFI catalysts on whose surface symmetrically arranged OH groups are present.... | 06/06/2000 |
| 6069106 | Process and compositions for Mn containing catalyst for carbo-metallic hydrocarbons An improved manganese and/or chromium-promoted catalytic process, catalyst and method of manufacture for heavy hydrocarbon conversion, optionally in the presence of nickel and vanadium on the catalyst and in the feed stock, to produce lighter molecular we... | 05/30/2000 |
| 6066691 | Anti-blocking agent and process for its manufacture An anti-blocking agent comprising silicon dioxide or mixtures of silicon dioxide and zeolite is described, which is characterized in that it has a bimodal pore size distribution, the first maximum of the bimodal pore size distribution being in the pore si... | 05/23/2000 |
| 6063723 | Sulfur tolerant zeolite catalyst A process is provided for catalyst dehydrogenation of light paraffinic hydrocarbons using a catalyst comprising a noble metal and an intermediate pore size zeolite having a specified alkali content. The catalyst is sulfur tolerant, so that the dehydrogena... | 05/16/2000 |
| 6063722 | Process for making a composition that is useful for converting lower value aromatics to higher value aromatics A process to produce a composition is provided. Said process comprises: contacting a zeolite component and selectivation component to form a first mixture; followed by treating said first mixture to form a second mixture; followed by contacting said secon... | 05/16/2000 |
| 6051519 | Ethylbenzene reduction catalyst composition and processes therefor and therewith A catalyst composition and an ethylbenzene isomerization process are disclosed. The composition comprises a silylated zeolite and a promoter comprising a Group VIII metal. The process comprises contacting a fluid which comprises ethylbenzene and at least ... | 04/18/2000 |
| 6048816 | Catalyst and process for converting methanol to hydrocarbons There is provided a catalyst and a process for converting methanol or dimethyl ether to a product containing C2 to C4 olefins. The catalyst comprises a porous crystalline material having a Diffusion Parameter for 2,2-dimethylbutane o... | 04/11/2000 |
| 6046128 | Method of manufacturing catalyst for purifying exhaust gas A method of manufacturing a catalyst for purifying exhaust gas, the catalyst including a pentasil-type crystalline aluminosilicate catalyst carrier carrying thereon a copper component and a phosphorus component. The method is characterized by adding the c... | 04/04/2000 |
| 6040259 | Metal-containing zeolite catalyst, preparation thereof and use for hydrocarbon conversion There is provided a zeolite bound zeolite catalyst which does not contain significant amounts of non-zeolitic binder and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The catalyst comprises first zeolite, crystals, a ... | 03/21/2000 |
| 6040257 | Hydrocarbon conversion catalyst composition and processes therefor and therewith A catalyst composition, a process for producing the composition, and a hydrocarbon conversion process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C6 to C8 aromatic hydrocarbons such as benzene, ... | 03/21/2000 |
| 6037294 | Zeolite material, a process of making such zeolite material, a product from such process, and the use thereof in the conversion of hydrocarbons A process for making an improved zeolite catalyst composition comprising acid-treating a zeolite to provide an acid-treated zeolite, ion-exchanging the ions of such acid-treated zeolite with ions of zinc and at least one other metal in the presence of an ... | 03/14/2000 |
| 6037292 | Compositions having two or more zeolite layers The present invention is directed towards compositions of two or more zeolite layers. The compositions of the invention include zeolite compositions that are themselves catalytic as well as zeolite compositions used in combination with non-zeolite catalyt... | 03/14/2000 |
| 6034020 | Zeolite-based catalyst material, the preparation thereof and the use thereof A process for producing catalyst compositions for converting a cracked gasoline feedstock to a product that is principally lower olefins. The catalyst compositions produced thereby. A process for converting a cracked gasoline feedstock to a product that i... | 03/07/2000 |
| 6013851 | Catalyst having a core and surface layer and use of same in olefin oligomerization A molecular sieve comprising a core having deposited thereon a surface layer, wherein the surface layer has a higher Si:Al ratio than that of the core, provides for lower branching in olefin oligomerization products.... | 01/11/2000 |
| 6008155 | Exhaust emission control catalyst and process for producing the same An exhaust emission control catalyst having an excellent NOx converting capability includes a modified alumina which has a θ-phase and an -phase and has an -conversion rate R in a range of 0.5 %ࣘRࣘ95 %, and a catalytic metal carried in ... | 12/28/1999 |
| 6004896 | Hydrocarbon adsorbers, method of making and use therefor A method for improving the adsorption properties of a hydrocarbon adsorber involves contacting a molecular sieve hydrocarbon adsorber at ambient temperature with an agent for modifying the acid sites of the molecular sieve to impregnate the molecular siev... | 12/21/1999 |
| 5994562 | Preparation of N-alkenylcarboxamides In a process for preparing N-alkenylcarboxamides by dehydration of N-(2-hydroxyalkyl)carboxamides and/or diethers thereof in the presence of a catalyst, molecular sieves, in particular zeolites, are used as catalyst.... | 11/30/1999 |
| 5993642 | Hydrocarbon conversion process using a zeolite bound zeolite catalyst There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, i... | 11/30/1999 |
| 5990032 | Hydrocarbon conversion catalyst composition and processes therefor and therewith A catalyst composition, a process for producing the catalyst composition, and a hydroconversion process for converting a fluid stream comprising at least one saturated hydrocarbon to C6 to C8 aromatic hydrocarbons such as benzene, to... | 11/23/1999 |
| 5985238 | Process for preparing ferrierite Ferrierite is prepared by a method that provides extremely pure crystalline material. The method consists of preparing a mixture of silica, alumina, alkali metal and pyridine of a certain composition and heating said mixture to form the crystals. The SiO | 11/16/1999 |
| 5981417 | Method of making an improved catalyst containing an acid-treated zeolite, a boron component, and a zinc component, a product from such method, and the use thereof in the conversion of hydrocarbons An improved zeolite catalyst containing an acid-treated zeolite, a boron component and a zinc component manufactured by a novel method having certain process steps necessary for providing the improved zeolite catalyst. The process steps include a first st... | 11/09/1999 |
| 5981418 | Zeolite based catalyst containing zinc, boron and phosphorus and method of making such zeolite based catalyst A novel composition including either a zeolite or an acid leached zeolite containing boron, zinc and phosphorus, used in the conversion of hydrocarbons. The novel composition is prepared by a novel method including incorporating into a zeolite or an acid ... | 11/09/1999 |
| 5976356 | Acid treated zeolite containing boron and silver used as a catalyst for converting hydrocarbons and a method of making and using such catalyst A novel zeolite catalyst comprising an acid treated zeolite impregnated with silver and boron, a method of making such zeolite catalyst, and the use thereof for converting paraffin hydrocarbons to olefins and aromatics.... | 11/02/1999 |
| 5972821 | Catalysts for cleaning exhaust gases A catalyst for cleaning exhaust gases has a first catalyst layer having as an active metal on an elemental support at least one noble metal selected from the group consisting of platinum, rhodium and palladium and a second catalyst layer having iridium as... | 10/26/1999 |
| 5968861 | Trimetallic zeolite catalyst and method of NOx abatement using the same A catalytic material useful for the abatement of NOx in a lean environment containing a zeolite material having incorporated therein copper, cobalt and iron as catalytically active species. The catalytically active metals are preferably incorpo... | 10/19/1999 |
| 5968474 | Pure phase titanium-containing zeolite having MEL structure, process for preparing same, and oxidation processes using same as catalyst Titanium-containing zeolites containing the MEL crystal structure are prepared using an organic templating agent comprising 3,5-dimethylpiperidinium compounds. The zeolites can be made in the pure phase form, and are useful as catalysts for the oxidation ... | 10/19/1999 |
| 5968341 | Activated silica enriched mazzite, production method and application thereof The invention provides an activated silica enriched mazzite having a chemical formula in the anhydrous state, expressed in molar ratios of: a M2/n O; Al2 O3 ; b SiO2 ; with a variation from 0 to 0.5, M being an alkaline c... | 10/19/1999 |
| 5968342 | Zeolite catalyst and method of converting hydrocarbons using the same The present invention provides a catalyst to convert hydrocarbons, which comprises a zeolite containing substantially no proton and having an intermediate pore diameter, a molar ratio of SiO2 to Al2 O3 of at least 20 and o... | 10/19/1999 |
| 5951963 | Phosphorous containing zeolite having MFI type structure The present invention discloses a phosphorus-containing zeolite having MFI type structure. The anhydrous composition (based on the mole ratios of oxides) of the above zeolite is 0.01-0.3Na2 O.Al2 O3.0.2-1.5P.sub.2 O5.30-90... | 09/14/1999 |
| 5952258 | Process for the preparation of pyridine using zeolite catalysts Disclosed is a process for the preparation of pyridine bases by a reaction of an aliphatic aldehyde and/or ketone with ammonia under gaseous phase using a specified catalyst in which a specified metal or combined metals are carried in or onto specified ze... | 09/14/1999 |
| 5952259 | Process for making an acid-base leached zeolite catalyst A catalyst composition and a process for converting a hydrocarbon stream such as, for example, gasoline to olefins and C6 to C8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises an al... | 09/14/1999 |
| 5952257 | MTW zeolite for cracking feedstock into olefins and isoparaffins The present invention relates to a zeolite catalyst, a process for using the catalyst for conversion of hydrocarbons, especially naphtha and LPG feedstock, and a process for preparing the catalyst.... | 09/14/1999 |
| 5932512 | Fluorination of synthesized molecular sieve catalysts for increased selectivity to ethylene during conversion of oxygenates to olefins A method for fluorinating molecular sieve catalysts to increase selectivity to ethylene during conversion of oxygenates to olefins, fluorinated catalysts produced by such method, and methods of using the fluorinated molecular sieve catalysts to increase s... | 08/03/1999 |
| 5908806 | Copper-silver zeolite catalysts A catalyst for the removal of carbon monoxide, hydrocarbons and nitrogen oxides in an exhaust gas made by a process comprising: a) preparing a suspension comprising a liquid, a zeolite, a weak base, and salts of copper and silver, said zeolite being crystallin... | 06/01/1999 |
| 5905051 | Hydrotreating catalyst composition and processes therefor and therewith A catalyst system and a process for converting a hydrocarbon stream such as, for example, a C9 +aromatic compound to C6 to C8 aromatic hydrocarbons such as xylenes are disclosed. The catalyst system comprises a first catal... | 05/18/1999 |
| 5888471 | Synthetic crystalline porous material containing oxides of silicon, titanium and gallium A synthetic, crystalline, porous material is disclosed, together with the related preparation process. Such material of zeolitic nature containing oxides of silicon, titanium and gallium corresponds, in the calcined and anhydrous state, to the following e... | 03/30/1999 |
| 5883033 | Hydrocarbon conversion catalyst composition and processes therefor and therewith A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C6 to C8 aromatic hydrocarbons such as toluene and xylene... | 03/16/1999 |
