Showing papers on "Catalyst support published in 1971"

Catalytic converter with electrically resistive catalyst support

Abstract: A corrugated stainless steel sheet and a flat stainless steel sheet are sandwiched together and wound spirally so the corrugations form a plurality of small gas flow passages connecting the converter inlet with the converter outlet. Alumina coatings on the sheets electrically insulate the sheets from each other and a finely divided catalyst is distributed on the alumina coatings. Electrical energy flows through the sheets to heat the catalyst to operating temperature.

Process for the production of catalysts for making vinyl esters

Abstract: HIGHLY ACITIVE CATALYSTS FOR THE PREPARATION OF CATALYSTS SUITABLE FOR VINYL ESTER, E.G., VINYL ACETATE, PRODUCTION ARE PREPARED BY TREATING A CATALYST SUPPORT, SIMULTANIOUSLY OR IN EITHER SEQUENCE, WITH OR WITHOUT INTERMEDIATE DRYING, WITH: (A) A SOLUTON OF NOBLE METALS CONTAINING AT LEAST SALTS OF PALLADIUM AND GOLD, AND (B) A SOLUTION CONTAINING COMPOUNDS, E.G., GASES SUCH AS SODIUM HYDROXIDE, WHICH ARE ABLE TO REACT WITH THE NOBLE METAL SALTS OF THE SOLUTION (A) TO FORM WATER INSOLUBLE NOBLE METAL COMPOUNDS; IMPREGNATING THE CATALYST SUPPORT WITH SUCH QUANTITIES OF SOLUTIONS (A) AND (B) CORRESPONDING TO FROM 10 TO 110% OF THE ABSORPTIVE CAPACITY OF THE CATALYST SUPPORT FOR THESE SOLUTIONS; SUBJECTING THE IMPREGNATED CATALYST SUPPORT TO A TIME TEMPERATURE TREATMENT SUCH THAT AT LEAST 95% OF THE IMPREGNATED PALLADIUM AND GOLD ARE TRANSFORMED INTO WATER INSOLUBLE NOBLE METAL COMPOUNDS; REDUCING THE METAL COMPOUNDS TO THE NOBLE METAL WITH A REDUCING AGENT, E.G., ETHYLENE OR HYDRAZINE; REMOVING THE WATER-SOLUBLE COMPOUNDS WHICH ARE CONTAINED IN THE CATALYST BY WASHING BEFORE OR AFTER THE REDUCTION STEP; AND OPTIONALLY TREATING THE RESULTING CATALYST WITH AN ALKALI METAL CARBOXYLATE, E.G., ACETATE, BEFORE OR AFTER THE TREATMENT WITH THE REDUCING AGENT.

Catalytic reaction apparatus for purifying waste gases containing carbon monoxide

Abstract: A catalyst composition obtained by dispersing a power catalyst containing a hydrated oxide or oxides or manganese dioxide in an organic solution containing alkoxytitanate, alkoxy substituted organosilane or dimethyl polysiloxane or a catalyst composition obtained by dispersing a power catalyst in a heat-resisting paint prepared by utilizing a liquid compound having a siloxane bond as the vehicle. The catalyst is exposed moderately when it is adhered to a carrier when said catalyst composition is prepared by employing a catalyst whose principal components consist of manganese oxide or oxides and lead oxide or oxides and/or bismuth oxide or oxides, it is best suited for oxidation and purification of a waste gas containing carbon monoxide. Besides, catalyst reaction apparatuses prepared by making the foregoing catalyst composition adhere to a carrier consisting of plural metallic plates and connecting one end or both ends of said carrier with a metallic structure configured to be suitable for the purpose of cooling is effective in gas-solid heterogeneous catalytic reaction.

Hydroalkylation catalyst and process

Abstract: A method for the catalytic hydroalkylation of an aromatic hydrocarbon. An aromatic hydrocarbon, for example, benzene is contacted with hydrogen and a dual function catalyst at hydroalkylation conditions including a temperature within the range of about 200 DEG to 450 DEG F. and at a hydrogen pressure of at least one atmosphere. The dual function catalyst comprises rhenium and an acidic oxide support. The acidic oxide support may be a silica-alumina cracking catalyst or a substantially alkali metal-free mixture of about 5 to 60 percent by weight of a crystalline zeolite and about 95 to 40 percent by weight of an alumina or a silica-alumina cracking catalyst. The hydrogenation activity of the rhenium may be modified by the inclusion of a Group VIII metal, a Group VI metal or their mixtures. Before use the composite catalyst is calcined at a temperature within the range of about 800 DEG to 1500 DEG F. and is reduced with hydrogen at a temperature within the range of about 400 DEG to 1200 DEG F. The process is useful in the hydroalkylation of benzene to prepare cyclohexylbenzene.

Low temperature methanol synthesis catalyst

Abstract: UNTIL RECENTLY LOW TEMPERATURE METHONAL SYNTHESIS CATALYSTS HAVE BEEN VIRTUALLY UNKNOW. A ZINC, COPPER AND CHROMIUM CATALYST HAS BEEN USED AS A LOW TEMPERATURE METHANOL SYNTHESIS CATALYST, BUT ALUMINA HAS BEEN DISCOUNTED AS HAVING NO PRACTICAL INTEREST AS AN INGREDIENT IN A METHANOL SYNTHESIS CATALYST. HOWEVER, UNDER CERTAIN CONDITIONS ALUMINA CAN BE USED TO ADVANTAGE IN SUCH CATALYSTS.

Catalyst for preparation of unsaturated nitriles

Abstract: IN THE PREPARATION OF UNSATURATED NITRILES BY CATALYTIC OXIDATION OF PROPYLENE OR ISOBUTYLENE WITH MOLECULAR OXYGEN IN THE PRESENCE OF AMMONIA USING A CATALYST COMPRISING OXIDES OF MOLYBDENUM, BISMUTH AND IRON, THE RESULTING UNSATURATED NITRILES ARE IPROVED IN YIELD BY USE OF A NOVEL CATALYST PREPARED BY INCORPORATING OXIDES OF COBALT AND ALKALI METALS (AT LEAST ONE OF SODIUM AND POTASSIUM) INTO SAID CATALYST IN SUCH A MANNER THAT THE ATOMIC RATIO OF MO/BI/FE/CO/NAT (OR K) MAY BE 12 1-11/1-9/1-6 0.5-2, WHEREIN THE SUM OF ATOMS OF BI AND CO IS CONTROLLED WITHIN 6-12, PREFERABLY 12/3.5-7/29/2-5/1/1. THE CATALYST IS USEFUL AS AN INDUSTRIAL CATALYST HAVING A HIGH CATALYST ACTIVITY AS WELL AS LONG LIFE, WHICH IS PARTICULARLY SUITABLE FOR USE IN A FLUIDIZEDBED REACTOR FOR THE PREPARATION OF UNSATURATD NITRILES FROM PROPYLENE AND ISOBUTYLENE.

Catalyst for the preparation of polyolefins

Abstract: A POLYMERIZATION CATALYST IS PREPARED BY MIXING (A) THE REACTION PRODUCT BETWEEN A MAGNESIUM COMPOUND CONTAINING HYDROXYL GROUPS, A TITANIUM ALCHOLATE AND A SILICIUM TETRAHALIDE WITH (B) AN ORGANO ALUMINUM COMPOUND. BY MEANS OF THIS CATALYST, OLEFINS CAN BE POLYMERIZED UNDER A VERY LOW PRESSURE AND THE POLYMER OBTAINED DOES NOT REQUIRE THE REMOVAL OF THE CATALYST.

Production of catalyst or catalyst support

Abstract: ALPHA ALUMINA OF RELATIVELY HIGH SURFACE AREA IS PRODUCED BY (1) IMPREGNATING COMMERCIAL ALUMINA XEROGEL WITH CARBON-FORMING MATERIAL, (2) HEATING AT MEDIUM TEMPERATURE TO CARBONIZE, (3) HEATING THE RESULTING CARBON-CONTAINING ALUMINA AT VERY HIGH TEMPERATURE IN INERT ATMOSPHERE THEREBY CONVERTING TO ALPHA ALUMINA OF RELATIVELY HIGH SURFACE AREA WHILE PREVENTING REACTIVE SINTERING DURING PHASE CHANGE, AND (4) FINALLY REMOVING THE CARBON THEREFROM BY CONVERSION OF THE CARBON TO A GASEOUS CARBON COMPOUND.

Titanium carbide catalysts, and the catalyst compositions

Abstract: A hydrocarbon conversion process and catalyst, the latter comprising a transition metal, or other hydrogenation-dehydrogenation component of said metal, composited with a nonstoichiometric titanium carbide support, particularly a support wherein the titanium carbide is an interstitial solid solution that possesses a stable phase over the stoichiometric range TiC0.52 to TiC0.99, and preferably within a range of TiC0.70 to TiC0.95. Such catalysts are useful for such hydrocarbon conversion processes as hydrogenation-dehydrogenation, hydrofining, hydrodesulfurization and reforming. By varying the stoichiometry of the titanium carbide support within the limits described, an interaction is created between the hydrogenation-dehydrogenation component and the support, and the activity and selectivity of the reactions can be controlled and optimized.

Hydrocarbon conversion using an iridium-gold catalyst

Abstract: Hydrocarbon materials are converted to useful products by contacting the same at elevated temperatures with a catalyst comprising a refractory support in association with greater than 0.1 wt. % iridium, and 0.1 - 1.0 wt. % of at least one additional metal. The iridium and additional catalyst metal, preferably platinum, are present on the surface of the support in the form of highly dispersed polymetallic clusters with metal surface areas of at least 200 square meters per gram of metal. The catalyst is particularly effective for promoting naphtha reforming operations.

Production of n-butenes from ethylene

Abstract: Ethylene can be dimerized in excellent yields over a unique catalyst of palladium oxide with molybdenum oxide and/or tungsten oxide on a catalyst support. The catalyst is specific for ethylene. For example 52 weight % n-butenes were produced over a 2% PdO - 10% MoO3 on Alcoa H-151 alumina at an ethylene feed rate of 50 ml/min. at 35*C. A 2% PdO-10% WO3 on Alcoa H-151 alumina at ethylene feed rate of 100 ml/min. and 70*C. gave 56 wt. % nbutenes.

Copper-based auto exhaust oxidation catalysts: deactivation and physical attrition

Abstract: ADVERSE AGING EFFECTS, SUCH AS DEACTIVATION AND PHYSICAL ATTRITION, ON COPPER-BASED AUTO EXHAUST OXIDATION CATALYSTS HAVE BEEN INVESTIGATED BY STUDIES OF CATALYSTS COMPRISING OXIDES OF COPPER ON ALUMINA. EXPOSURE TO CYCLIC OXIDATION REDUCTION CAN CAUSE PHYSICAL ATTRITION OF POORLY DISPERSED COOPER-BASED CATALYSTS IN THE PRESENCE OR ABSENCE OF HALIDES. THIS CHEMICALLY INDUCED ATTRITION PROCESS IS RELATIVELY INDEPENDENT OF THE HARDNESS OF THE CATALYST SUPPORT. HOWEVER, HIGH DISPERSION OF THE COPPER COMPONENT CAN IMPART GOOD ATTRITION RESISTANCE EVEN UNDER CYCLIC CONDITIONS. HALIDES FROM THE LEAD MOTOR MIX CONTRIBUTE SIGNIFICANTLY TO DEACTIVATION VIA DEPLETION OF THE ACTIVE COMPONENT FROM THE SURFACE OF THE CATALYST. /AUTHOR/

Catalyst,catalyst preparation method,and process for catalytic hydrotreating unsaturated hydrocarbons

Abstract: A METHOD FOR HYDROTREATING UNSATURATED HYDROCARBON FEEDSTREAMS CONTAINING MONOOLEFINS, DIOLEFINS, OR ACETYLENES BY CONTACTING THE FEEDSTREAM WITH AN IRON-CONTAINING CATALYST; THE IRON-CONTAINING HYDROTREATING CATALYST; AND A METHOD FOR PREPARING THE AFOREMENTIONED HYDROTREATING CATALYST.

Pt-pb catalyst compositions

Abstract: PT-PB CATALYST COMPOSITIONS CONTAINING SPECIFIED AMOUNTS OF PT AND PB SPECIFIED RATIOS AND PREPARED BY PARTICULAR IMPREGNATION PROCEDURES ARE EFFECTIVE HYDROFORMATION CATALYST.

Novel catalyst support

Abstract: THE DISCLOSURE PROVIDES A NOVEL CATALYST SUPPORT, A METHOD OF MAKING SAID SUPPORT BY TREATMENT OF PRIOR ART CRYSTALLINE CATALYST SUPPORT WITH HYDROXY-ALUMINUM SOLUTION AND HYDROCARBON CONVERSION PROCESSES WHEREIN THE CAATALYST USED THEREIN INCLUDES SAID SUPPORT.

Olefin disproportionation catalyst and process for using same

Abstract: AN OLEFI DISPROPORTIONATION CATALYST IS PROVIDED COMPRISING A MONOR AMOUNT OF TUNGSTEN OXIDE OR MOLYBEDENUM OXIDE, ABOUT 0.01 TO 1 WEIGHT PERCENT OF FLUORINE, THE REMAINDER OF THE CATALYST SUBSTANTIALLY BEING SILICA. THE PROCESS OF USING THIS CATALYST TO DISPROPORTIONATE UNSATURATD MATERIALS IS ALSO CLAIMED.

Method of preparing a calcined copperiron supported catalyst and process utilizing the catalyst

Abstract: A COPPER-IRON GROUP METAL CATALYST USEFUL FOR THE CONVERSION OF THIOLS TO DISULFIDES IS PREPARED BY CO-IMPREGNATING A SUPPORT WITH A SOLUTION OF A COPPER SALT AND AN IRON GROUP METAL SALT BY THE METHOD OF MINIMUM EXCESS SOLUTION.

Peripheral impregnation of catalyst support material

Abstract: A POROUS CATALYST BASED OR USPPORTED MATERIAL, FOR EXAMPLE ALUMINA, IS INITIALLY SATURATED WITH A POLYMERIZABLE HYDROCARBON, FOR EXAMPLE STYRENE, WHICH IS THEREAFTER POLYMERIZED. SUBSEQUENT IMPREGNATED SUPPORT IS SUBSEQUENTLY WITH CATALYTIC MATERIALS IS THUS RESITRICTED TO THE PERIPHERAL SURFACE THEREOF. THE IMPREGNATED SUPPORT IS SUBSEQUENTLY CALCINED WHEREBY THE HYDROCARBON POLYMER IS DEPOLYMERIZED AND SEPARATED THEREFROM.

Catalyst for ammonia synthesis and a process producing the catalyst

Abstract: A NOVEL CATALYST FOR AMMONIA SYNTHESIS AND A PROCESS FOR PRODUCING THE CATALYST ARE DESCRIBED. THE CATALYST COMPRISES (A) GRAPHITE, (B) A TRANSITION METAL COMPOUND AND (C) AN ALKALI METAL. THE CATALYST OF THIS INVENTION IS CAPABLE OF SYNTHESIZING AMMONIA FROM HYDROGEN AND NITROGEN OR AIR AT A RELATIVELY LOW TEMPERATURE EVEN AT ROOM TEMPERATURE UNDER NORMAL OR A REDUCED PRESSURE.

Catalyst for oxidation and a method for producing the same

Abstract: A CATALYST FOR OXIDATION AND A METHOD FOR PRODUCING THE SAME, IN WHICH SAID CATALYST CONSISTS ANY ONE OF: (A) ALKALI POLYALUMINATE, (B) A MIXTURE OF SAID ALKALI POLYALUMINATE AND ANOTHER REFRACTORY MATERIAL, (C) A MIXTURE OF SAID (A) AS CATALYST CARRIER OR PROMOTER AND OTHER CATALYTIC MATERIAL, OR (D) A MIXTURE OF SAID (B) AS CATALYST CARRIER OR PROMOTER AND OTHER CATALYTIC MATERIAL.

Method of preparing an oxidation catalyst for partially combusted gases

Abstract: A copper chromite-containing catalyst is prepared by intimately admixing in the solid state a source of copper chromite and an alumina-containing support material, and drying the resulting product generally after forming the same into desired particle form. The use of such catalyst to treat exhaust gases from internal combustion engines is described.

Ready-to-use lead sulfide catalyst

Abstract: ALREADY-TO-USE LEAD SULFIDE CATALYST FOR USE IN THE BENDER (A REGISTERED TRADEMARK) SWEETENING PROCESS OF SOUR PETROLEUM PRODUCTS. THE LEAD SULFIDE CATALYST COMPRISES A CARRIER OF PARTICULATE INERT SOLIDS AND A RELATIVELY DRY EXPOSED COATING RESIDING ABOUT THE EXTERIOR SURFACE OF THE SOLIDS THE COATING IS FORMED OF A MIXTURE OF SODIUM SULFIDE AND LEAD OXIDE REACTED IN THE PRESENCE OF AN AQUEOUS SOLUTION OF SODIUM SILICATE BINDER, PREFERABLY THE SODIUM SULFIDE IS INTRODUCED IN A STOICHIOMETRIC AMOUNT RELATIVE TO THE LEAD OXIDE IN THE MIXTURE. THE CATALYST CAN BE PROTECTED FROM OXIDIZING GASES OR MOISTURE BY A HYDROCARBON SOLUBLE COVERING ENCLOSING THE COATING ON THE CARRIER. FOR EXAMPLE THE COATING MAY BE A HIGH-MELTING POINT NATURAL, PETROLEUM OR SYNTHETIC WAX.

Platinum-rhenium hydrocarbon conversion process

Abstract: Increased product yields are obtained using an alumina-platinum group metal-rhenium-halogen catalyst wherein the alumina is derived from hydrous alumina predominating in alumina trihydrate by employing a water concentration in contact with the catalyst during processing regulated within a range higher than substantially anhydrous conditions. Additional beneficial results are obtained, if, prior to processing, the catalyst is contacted with a hydrogen-containing gas containing at least about 5 mole ppm. of water vapor.

Chromia-alumina catalyst

Abstract: TRIETHYL ALUMINUM IS EMPLOYED AS REACTANT IN A CONVERSION TO VALUABLE PRODUCTS, FORMING AN ALUMINA BYPRODUCT CONSISTING PREDOMINANTLY OF ALUMINA ALPHA-MONOHYDRATE AND A SIGNIFICANT AMOUNT OF AMORPHOUS ALUMINA. PARTICLES OF THIS BY-PRODUCT ARE MARKETED AS A TECHNICAL GRADE OF BOEHMITE. A PRECURSOR MIXTURE IS PREPARED COMPRISING CALCINED ALUMINA POWDER, A LARGER AMOUNT OF SAID TECHNICAL GRADE OF BOEHMITE, AND AN AQUEOUS SOLUTION CONTAINING AMMONIUM DICHROMATE. SAID MIXTURE IS EXTRUDED, SLICED INTO PELLETS, CALCINED IN STEAM, AND COOLED TO PROVIDE DEHYDROGENATION CATALYST CONSISTING OF ABOUT 20% CHROMIA AND 80% ALUMINA. PROPANE AT SUBATMOSPHERIC PRESSURE IS DEHYDROGENATED AT A HIGH CONVERSION PER PASS TO PROVIDE AN ATTRACTIVE YIELD OF PROPENE OVER SAID CATALYST AT 570-680*C. AT A SPACE VELOCITY OF FROM ABOUT 0.2 TO ABOUT 5 VOLUMES OF LIQUID PROPANE PER VOLUME OF CATALYST PER HOUR DURING A COMMERICALLY ACCEPTABLE CATALYST LIFE.

Catalyst for oxidation of o-xylene

Abstract: 1. A CATALYST FOR THE PREPARATION OF PHTHALIC ANHYDRIDE BY OXIDATION OF ORTHO-XYLENE IN THE GASEOUS PHASE COMPRISING A SUPPORT IMPREGNATED WITH A SILICATE ENAMETL AND A COATING OF CATALYTICALLY ACTIVE MATERIAL ON THE ENAMELLED SUPPORT.

Process for preparing fluidized bed catalyst for production of aromatic nitriles

Abstract: FLUIDIZED BED CATALYST HAVING AN ATOMIC RATIO OF V:CR:B OF 1:0.5-2.0:0.1-1.2, A TOTAL AMOUNT OF THEIR OXIDES CARRIED ON THE CATALYST BEING 20 TO 80% BY WEIGHT, BASED ON THE WEIGHT OF THE CATALYST AND CLOSED BULK DENSITY OF 0.85 TO 1.20 G./ML. IS PREPARED BY SPRAY-DRYING A SILICA SOL SLURRY CONTAINING A VANADIUM COMPOUND, A CHROMIUM COMPOUND AND A BORON COMPOUND ESPECIALLY PREPARED BY USING A DISSOLUTION AGENT FOR THE BORON COMPOUND, FOR EXAMPLE, A CIS-POLYHYDRIC ALCOHOL HAVING HYDROXYL GROUPS AT AN A- OR B-POSITION MUTUALLY OR AN A-HYDROXYCARBOXYLIC ACID, AT AN OUTLET TEMPERATURE OF A SPRAY-DRIER OF 85* TO 160*C. THE CATALYST IS USEFUL FOR THE PRODUCTION OF AROMATIC NITRILES BY FLUIDIZED BED METHOD.