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| Number | Title | Issue Date |
| 7326815 | Selective oxidation of alkylbenzenes The present invention relates to a process for producing phenol and a ketone of general formula R1COCH2R3 (I), in which R1 and R2 each independently represent an alkyl group having from 1 to 4 carbon atoms, said... | 02/05/2008 |
| 7319082 | Process for the preparation of molecular sieve adsorbent for selective adsorption of oxygen from air The invention relates to the manufacture of molecular sieve adsorbents, which are selective towards oxygen from its gaseous mixture with argon and/or nitrogen. More particularly, this invention relates to the manufacture of molecular sieve adsorbents useful for the ... | 01/15/2008 |
| 7304198 | Staged alkylation in microchannels The invention provides methods and systems for alkylating a paraffinic feed stream in a microchannel utilizing the staged addition of olefin. ... | 12/04/2007 |
| 7259121 | Method of reducing the NO content of gases and selected catalysts A method of reducing the N2O content in gases is described. A selected zeolite catalyst is used in the method. This catalyst is present in the H form and/or contains exchanged iron and is characterized by the presence of nonlattice aluminum in addition to... | 08/21/2007 |
| 7192900 | Hydrocracking catalyst Hydrocracking catalyst composition comprising an optional metal hydrogenation component supported on a carrier comprising a zeolite of the faujasite structure having a unit cell size in the range of from 24.10 to 24.40 Å, a bulk silica to alumina ratio (SAR) above... | 03/20/2007 |
| 7148381 | Process for the activation of zeolitic catalysts containing titanium and their use in oxidation reactions A process is described for the activation of zeolitic catalysts containing titanium having the formula: xTiO2(1-x)SiO2 wherein x ranges from 0.0001 to 0.4, which consists in treating said materials with a solution of an ammonium salt of a carbo... | 12/12/2006 |
| 7060645 | Method for manufacturing zeolite and method for manufacturing ε-caprolactam The present invention provides a method for manufacturing a zeolite comprising following steps of: (1): calcining crystals obtained by hydrothermal synthesis reaction of a silicon compound; (2): contact treating a calcined product obtained ... | 06/13/2006 |
| 7022844 | Amide-based compounds, production, recovery, purification and uses thereof Methods are disclosed of producing and purifying at least one amide. In accordance with one of the methods disclosed herein, the at least one amide is produced by providing an organic liquid comprising at least one oxime, providing at least one catalyst, adding the ... | 04/04/2006 |
| 6982074 | High silica zeolites: UZM-5HS A family of crystalline aluminosilicate zeolites designated UZM-5HS and derived from UZM-5 have been synthesized. The aluminum content of the UZM-5HS is lower than that of the starting UZM-5 thus changing its ion exchange capacity and acidity. These UZM-5HS are repr... | 01/03/2006 |
| 6946553 | Process for producing ε-caprolactam and catalyst for the production Improved processes for producing an ε-caprolactam using a solid catalyst and for producing a catalyst which can be used in the production of ε-caprolactam are provided. In the present invention, a solid catalyst such as a zeolite is treated with an aqueous solutio... | 09/20/2005 |
| 6930210 | Process to produce polyether polyols The invention relates to a process to produce high-purity, low-odour polyether polyols, with very low levels of catalytic residues, by means of alkene oxide polyaddition reactions to substances that contain active hydrogens in the presence double metal cyanides as c... | 08/16/2005 |
| 6909026 | Process for liquid phase aromatics alkylation comprising in-situ catalyst reactivation with polar compounds The catalyst becomes at least partially deactivated by sorbing catalyst poisons present in the feed during a process for alkylating aromatics by contacting a feed containing benzene, toluene, xylenes, alkylbenzenes, naphthalene or substituted naphthalenes under liqu... | 06/21/2005 |
| 6806219 | Exchanged zeolites X, in particular exchanged with lithium, their process of preparation and their use as adsorbents of nitrogen in the separation of the gases of the air The present invention relates to zeolites X, most of the exchangeable sites of which are occupied by lithium and di- and/or trivalent cations, having an improved thermal stability and an improved crystallinity with respect to zeolites of the prior art with the same ... | 10/19/2004 |
| 6734131 | Heterogeneous chromium catalysts and processes of polymerization of olefins using same A chromium containing catalyst wherein the chromium atom is in one of its higher valence states and is immobilized to a support-agglomerate composed of at least one inorganic oxide component and at least one ion-containing layered component. ... | 05/11/2004 |
| 6680271 | Solid zeolite granulates having improved abrasion resistance, and methods of making them Zeolite granulates having improved abrasion resistance, obtained by spraying the zeolite granulates with an aqueous silica sol solution and then optionally drying and calcining them.... | 01/20/2004 |
| 6660245 | Methods for detemplating zeolites and silicalites for use in integrated circuit manufacture Structure-directing agents, such as quaternary ammonium, are removed from silicalite or zeolite crystals by oxidative attack (e.g., using CO2, H2 O or NH3) first, by using a combination of ammonia, water and hydrogen perox... | 12/09/2003 |
| 6521208 | Process for preparing a modified zeolite A hydrophobic zeolite is prepared having high Hydrophobicity Index number by calcining a zeolite with steam under turbulent condition with respect to flow pattern of the zeolite and at a temperature within the range of 650-1000° C.... | 02/18/2003 |
| 6475465 | Titanium-silicalite molecular sieve and the method for its preparation The present invention relates to a titanium-silicalite (TS-1) molecular sieve and the method for preparation of the same, wherein each crystallite of said titanium-silicalite molecular sieve has a hollow cavity with a radial length of 5-300 nm. The benzen... | 11/05/2002 |
| 6440886 | 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... | 08/27/2002 |
| 6407025 | Method of manufacture of multicationic molecular sieves Zeolites exchanged with lithium cations and polyvalent cations are prepared by first partially ion-exchanging a sodium-containing zeolite, a potassium-containing zeolite or a sodium- and potassium-containing zeolite with polyvalent cations, then heat-trea... | 06/18/2002 |
| 6333289 | Process for activating catalysts for isomerizing aromatic compounds containing eight carbon atoms The present invention relates to a process for activating catalysts for isomerizing aromatic compounds containing 8 carbon atoms, the catalysts containing at least one group VIII metal, comprising at least one sulfurization and at least one passivation us... | 12/25/2001 |
| 6316379 | ZSM-5 zeolite materials doped with fluorine species for the synthesis of MTBE and other acido-catalyzed reactions Provided herein is are acidic Z5M-5 zeollte materials which are highly active and selective in the synthesis of methyl tert-butyl ether (MTBE) and similar ethers. The materials are obtained by the preparation method comprising the main steps of: i) impreg... | 11/13/2001 |
| 6316647 | Cation-exchanged clay mineral, packing material for chromatography using the same and method of producing the same Disclosed herein are a cation-exchanged clay mineral comprising a swelling clay mineral with the cations between layers substantially replaced by low-valence metal amine complexes and/or low-valence metal ammine complexes, and a packing material for chrom... | 11/13/2001 |
| 6303530 | Preparation of uniformly impregnated extrudate catalyst A method for preparing a catalyst having one or more noble metals disposed in a relatively homogeneous distribution on a base which includes an inorganic refractory binder and a zeolite. The method provides for uniformly depositing noble metals on the bas... | 10/16/2001 |
| 6303099 | Process for producing pentacyl-type crystalline zeolites and a process for producing &3xb5;-caprolactam using the same A process for producing a pentacyl-type crystalline zeolite is provided which comprises the steps of (i) preparing a mixture of a silicon compound, water and tetrapropyl ammonium hydroxide, (ii) conducting a hydrothermal reaction of the mixture to obtain ... | 10/16/2001 |
| 6300270 | Method of making a zeolite material A catalyst composition prepared by a method which comprises incorporating at least one transition metal into a calcined zeolite-silica material, calcining the resulting transition metal-incorporated calcined zeolite-silica material and contacting the resu... | 10/09/2001 |
| 6218329 | Process for forming alumino-silicate derivatives A process for the preparation of an amorphous alumino-silicate derivative which involves reacting a solid corresponding starting material with MOH where M is alkali metal or ammonium cation. The solid corresponding starting material may be selected from m... | 04/17/2001 |
| 6200919 | Alumino-silicate derivatives The formation of new materials in the form of alumino-silicate derivatives from 2:1 layer clay materials which are obtained by the chemical modification of 2:1 layer clay minerals by reaction with a salt having the formula MX wherein M is ammonium ion or ... | 03/13/2001 |
| 6165439 | Dealuminated NU-86 zeolite and its use for the conversion of hydrocarbons The invention concerns a NU-86 zeolite comprising silicon and at least one element T selected from the group formed by aluminium, iron, gallium and boron, preferably aluminium, characterized in that element T has been extracted from the framework, and in ... | 12/26/2000 |
| 6162416 | 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... | 12/19/2000 |
| 6150294 | Production of crystalline silicate catalyst having monoclinic structure A process for producing a crystalline silicate catalyst having a monoclinic structure, the process comprising providing a crystalline silicate of the MFI-type having a silicon/aluminum atomic ratio lower than 80; treating the crystalline silicate with ste... | 11/21/2000 |
| 6136291 | Faujasite zeolitic materials Novel crystalline zeolitic materials of the faujasite structure having an increased ratio of zeolitic surface area to mesoporous surface area and distinctive X-Ray Diffraction peak ratios are produced by calcining zeolite Y of low sodium content at temper... | 10/24/2000 |
| 6124228 | Mazzite supported catalyst A catalyst, method for preparing the catalyst, and method for using the catalyst having improved conversion and/or selectivity in the dehydrogenation of hydrocarbons. The catalyst being prepared by modifying and impregnating a mazzite zeolite. Modificatio... | 09/26/2000 |
| 6114267 | Process for the preparation of fluidized catalytic cracking (FCC) catalyst A process for preparation of fluidized catalytic cracking (FCC) catalyst, comprising silicon stabilized large crystallite sized synthetic faujasite zeolite, aluminum depleted and normal kaolin clay, alumina and silica. The cracking catalyst is highly acti... | 09/05/2000 |
| 6087514 | Titanium silicate molecular sieve oxidation catalysts and the production thereof Disclosed are novel crystalline molecular sieves having the framework of ETS-10 titanium silicate which contain both octahedral and tetrahedral titanium atoms and are in acid form. The sieves are prepared by adding a complexing agent such as hydrogen pero... | 07/11/2000 |
| 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 |
| 6054113 | Method for preparing high silica faujacitic zeolites A method for preparing novel zeolitic catalyst compositions having a high Si/Al ratio and a crystallinity of at least about 70%. The method involves cation exchanging an as synthesized faujasite material having an Si/Al greater than about 4 with a compone... | 04/25/2000 |
| 6051521 | Method of producing an aromatics alkylation catalyst This invention provides a method of producing an aromatics alkylation catalyst comprising the steps of: (a) synthesizing a layered oxide material MCM-56 in the presence of alkali and/or alkaline earth metal cations; (b) prior to any calcination of the MCM-56, ... | 04/18/2000 |
| 6043178 | Midbarrel hydrocracking catalyst and preparation thereof A midbarrel hydrocracking catalyst includes the following: a. 10-75% by weight of a Y-type molecular sieve; b. 10-25% by weight of a small pore alumina; c. 0-40% by weight of an amorphous aluminosilicate; d. 0-25 % by weight of a large pore alumina; e. 12-32% by weight ... | 03/28/2000 |
| 6036846 | Catalyst based on modified NU-87 zeolite and a process for improving the pour point of feeds containing paraffins The invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising an NU-87 zeolite comprising silic... | 03/14/2000 |
