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| Number | Title | Issue Date |
| 7897801 | Process for the preparation of dinitriles The present invention relates to a process for the preparation of dinitriles by hydrocyanation of unsaturated nitrile compounds in the presence of a catalyst based on a metal element in the zero oxidation state and on organophosphorus ligands;the invention relates m... | 03/01/2011 |
| 7709673 | Process for making 3-pentenenitrile by hydrocyanation of butadiene The invention provides a continuous process for the production of 3-pentenenitrile comprising: (a) contacting, in a reaction zone, a hydrogen cyanide-containing feed, a butadiene-containing feed, and a catalyst precursor compositio... | 05/04/2010 |
| 5236882 | Catalyst comprising a hydrogenation metal and a delaminated layered silicate There is provided a catalyst comprising at least one hydrogenation metal, such as Ni and Mo, supported on a delaminated layered silicate, such as kenyaite, which has been swollen and calcined. There is also provided a method for making this catalyst. Ther... | 08/17/1993 |
| 4861570 | Novel silicate A novel crystalline silicate has been prepared under hydrothermal conditions using as diquaternary ammonium salts derived by reaction of diazabicyclo [2.2.2] octane with ,ω-dibromoalkanes.... | 08/29/1989 |
| 4851200 | Method for removing organic residue from as-synthesized zeolites There is provided a three-step method for removing the residue of an organic directing agent from as-synthesized zeolites. The first step involves contacting the as-synthesized zeolite with an aqueous solution of a fluorosilicate salt such as ammonium flu... | 07/25/1989 |
| 4849573 | Process for manufacturing light olefins Methanol is catalytically converted to hydrocarbons with high yield of light olefins. The catalysts employed are crystalline aluminosilicate zeolites having high silica to alumina ratios and the conversion is conducted at temperatures of from about 350° ... | 07/18/1989 |
| 4846853 | Layered divalent metal hydrogen phosphates Layered divalent metal hydrogen phosphate, MHPO4.nH.sub.2 O wherein M is a Group IIA or Group IIB element and n ranges from about 0 to 2, is prepared by hydrothermal treatment of an aqueous mixture containing a source of metal oxide, a source o... | 07/11/1989 |
| 4837398 | Ammonium activation of zeolites in the presence of gaseous ammonia Alumina-composited zeolite catalysts are activated by contact with an aqueous ammonium solution under ammonia gas pressure such that a pH of at least about 8 is maintained in the solution. The treated zeolite may thereafter be calcined without prior ammon... | 06/06/1989 |
| 4832927 | Use of poly-nuclear oxo-metalates in synthesis of crystalline oxides There is provided a process for using poly-nuclear oxometalates in the synthesis of crystalline oxide materials. In addition to a poly-nuclear oxometalate, the reaction mixture includes an additional source of an oxide and two distinct liquid phases, one ... | 05/23/1989 |
| 4831006 | Method for intercalating organic-swelled layered metal chalcogenide with polymer chalcogenide by treatment with organic, hydrolyzable, polymeric chalcogenide precursor wherein organic hydrolysis by-products are removed Organic-swelled layered metal chalcogenides, e.g., titanometallates or silicotitanates, are intercalated with polymeric chalcogenide, e.g., polymeric silica by treatment with organic hydrolyzable polymeric chalcogenide precursor wherein hydrolysis to poly... | 05/16/1989 |
| 4831005 | Method for intercalating organic-swelled layered metal chalcogenide with a polymeric chalcogenide by plural treatments with polymeric chalcogenide precursor Organic-swelled layered metal chalcogenides, e.g., titanometallates or silicotitanates, are intercalated with polymeric chalcogenide by plural treatments with hydrolyzable, electrically neutral polymeric chalcogenide precursor, e.g., tetraethylorthosilica... | 05/16/1989 |
| 4822938 | Processes for converting methane to higher molecular weight hydrocarbons via sulfur-containing intermediates There is provided a process for converting methane to higher molecular weight hydrocarbons. In a first step, methane is contacted with elemental sulfur under conditions sufficient to produce carbon disulfide. Carbon disulfide from this step is then contac... | 04/18/1989 |
| 4822943 | Production of para-diisopropylbenzene A process is disclosed whereby cumene and/or benzene is brought into contact propylene in the presence of a ZSM-12 catalyst to selectively produce para-diisopropylbenzene.... | 04/18/1989 |
| 4812222 | Production of lubricasting oils by hydrocracking A proces for hydrocracking 343° C.+ feedstock which contains polycyclic aromatics to form a lube base stock having enhanced oxidation stability and viscosity index is disclosed. The process employs a catalyst which comprises a layered silicate... | 03/14/1989 |
| 4777156 | Regeneration of methanol/methyl ether conversion catalysts A process for using hydrogen-containing gas to regenerate a zeolite catalyst comprising at least some crystalline aluminosilicate zeolitic material having pore windows formed by 8-membered rings of oxygen atoms, e.g., ZSM-34, which has been used to promot... | 10/11/1988 |
| 4654138 | Catalytic process for modifying organic compounds The crystalline silicophosphoaluminate designated MCM-10 catalyzes various processes for modifying organic compounds, particularly the cracking of hydrocarbons and the conversion of alcohols and ethers to olefins.... | 03/31/1987 |
| 4647442 | Crystalline silicophosphoaluminate from a two phase medium An improved method of synthesis for a composition comprising crystalline silicophosphoaluminate (MCM-2) is provided. The composition has ion-exchange properties and is readily convertible to catalytically active material. The synthesis method requires two... | 03/03/1987 |
| 4629818 | Aromatization catalyst for a refinery off gas stream There is provided a catalyst comprising (i) ZSM-5 or ZSM-11, (ii) gallium and (iii) thorium. Also provided is a process for converting ethylene, propylene and/or propane into aromatics with this catalyst. Modification of ZSM-5 with both Ga and Th has been... | 12/16/1986 |
| 4629817 | Transfer of cycloalkyl groups by transalkylation of aromatics There is provided a process for transferring cycloalkyl groups from donor to acceptor aromatic molecules. The process involves the use of a Bronsted acid catalyst such as trifluoromethanesulfonic acid.... | 12/16/1986 |
| 4605637 | Hydrothermal activation of acid zeolites with aluminum phosphates There is provided a process for activating a zeolite with an aluminum phosphate material. The process comprises hydrothermally treating an intimate mixture of the zeolite and an effective amount of aluminum phosphate activating agent in contact with an aq... | 08/12/1986 |
| 4590050 | Synthesis of crystalline aluminum phosphates with a urea templating agent There is provided a method for preparing a microporous crystalline aluminum phosphate with a urea templating agent. Also provided are microporous, crystalline aluminum phosphates having characteristic structures.... | 05/20/1986 |
| 4590322 | Use of hydrogen sulfide to improve benzene production over zeolites There is provided a process for producing aromatic hydrocarbons enriched in benzene content. The process involves contacting one or more C2 -C8 non-aromatic hydrocarbons, such as propylene, with a catalyst containing a zeolite, such ... | 05/20/1986 |
| 4590321 | Aromatization reactions with zeolites containing phosphorus oxide There is provided a process for producing aromatic hydrocarbons. The process involves contacting one or more non-aromatic compounds, such as propane, propylene, or methanol, with a catalyst containing a zeolite, such as ZSM-5. The zeolite is modified with... | 05/20/1986 |
| 4590323 | Conversion of paraffins to aromatics over zeolites modified with oxides of group IIIA, IVA and VA elements There is provided a process for producing aromatic hydrocarbons from paraffins. The process involves contacting one or more C2 -C12 alkanes with a catalyst containing a zeolite, such as ZSM-5, modified with one or more oxides of Grou... | 05/20/1986 |
| 4584422 | Selective alkylation of xylenes with ethylene A process for the production of 3,4-dimethyl-1-ethylbenzene by selective alkylation of dimethylbenzene with ethylene. The process is carried out in the presence of a crystalline zeolite catalyst having a silica to alumina mole ratio of at least about 12 a... | 04/22/1986 |
| 4580000 | Selective sorption of n-alkylbenzene from a mixture containing n-alkyl and sec-alkyl benzenes There is provided a method for the selective sorption of n-alkylbenzene, such as n-propylbenzene, from an alkylbenzene mixture, such as a mixture of n-propylbenzene and isopropylbenzene, with an oxide impregnated ZSM-5 sorbent. This method may be particul... | 04/01/1986 |
| 4577050 | 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.... | 03/18/1986 |
| 4562166 | Synthesis of Dodecasil-1H with a methylazabicyclononanium directing agent There is provided a method and a reaction mixture for preparing the zeolite, Dodecasil-1H, with a methylazabicyclononanium directing agent. There is also provided the Dodecasil-1H zeolite in as-synthesized form prepared by this method.... | 12/31/1985 |
| 4559213 | Synthesis of ZSM-12 zeolite There is disclosed a process for preparing a ZSM-12 crystalline zeolite wherein the organic template used in the synthesis has the formula: ##STR1## wherein n=4-10. The template, designated herein DABCO-Cn -diquat, is obtained from a dihal... | 12/17/1985 |
| 4556549 | Process for making zeolite ZSM-45 with an organocobalt complex This invention relates to a method for preparing a synthetic porous crystalline aluminosilicate zeolite, characterized as zeolite ZSM-45. This crystalline material may have a molar ratio of silica to alumina of at least 8. This synthetic zeolite is analog... | 12/03/1985 |
| 4556477 | Highly siliceous porous crystalline material ZSM-22 and its use in catalytic dewaxing of petroleum stocks A new zeolite, designated ZSM-22, is disclosed and claimed. The new zeolite has the composition, in the anhydrous state, expressed in terms of mole ratios of oxides as follows: wherein Q2 O is the oxide form of an organic compound containing an ... | 12/03/1985 |
| 4554394 | Organophosphorus-treated zeolite catalysts for para-selective aromatics conversion A method is provided for treating modified ZSM-5 type zeolite catalysts with a vapor phase organophosphorus reagent such as trimethylphosphite or dimethylmethylphosphonate in order to improve the para-selective properties of such catalysts for the convers... | 11/19/1985 |
| 4548914 | Zeolite catalysts of improved activity and para-selectivity A method is provided for treating modified ZSM-5 type zeolite catalysts with water vapor in order to enhance the aromatics conversion activity and/or the para-selective properties of such catalysts for the conversion of aromatic materials. The modified ze... | 10/22/1985 |
| 4547618 | Modified ZSM-12 catalysts and processes for conversion of propane to propylene There is provided a catalyst comprising ZSM-12 and two modifiers. The modifiers are (i) magnesium and/or manganese and (ii) platinum. There is also provided a process for converting propane to propylene by a dehydrogenation reaction with this catalyst.... | 10/15/1985 |
| 4532226 | Zeolite catalysts modified with Group VI A metal A modified zeolite catalyst composition is provided for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mo... | 07/30/1985 |
| 4504690 | Organophosphorus-treated zeolite catalysts for para-selective aromatics conversion A method is provided for treating modified ZSM-5 type zeolite catalysts with a vapor phase organophosphorus reagent such as trimethylphosphite or dimethylmethylphosphonate in order to improve the para-selective properties of such catalysts for the convers... | 03/12/1985 |
| 4486616 | Rejuvenation of deselectivated alkylation catalyst A process for alkylation of aromatic hydrocarbon reactants to dialkylbenzene products, whereby chemically modified zeolite catalysts are treated with an organic acid to enhance their intrinsic para-selectivity in the alkylation reaction. The modified zeol... | 12/04/1984 |
| 4452958 | Olefin polymerization with catalysts derived from chromium exchanged zeolites There is provided the polymerization of 1-olefins such as ethylene with zeolite supported, chromium catalyst compositions. Chromium ions are ion exchanged with zeolites to produce such catalysts.... | 06/05/1984 |
| 4451612 | Continuous process for the preparation of rubber modified polymers The present invention relates to a method for the production of high impact polystyrene utilizing a continuous process in place of the previously known batch polymerization techniques. The continuous process includes the steps of rubber solution preparati... | 05/29/1984 |
| 4420418 | Para-selective zeolite catalysts A process is provided for treating modified ZSM-5 type zeolite catalysts with carboxylic acid (or anhydride) and water vapor treating agents in order to enhance the para-selective properties of such catalysts for the alkylation of aromatic materials witho... | 12/13/1983 |
