Matches 501 - 550 out of 680 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >
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4083805 Preparation of methacrylic acid from methacrolein  
Methacrylic acid or acrylic acid are produced by the oxidation of methacrolein or acrolein, respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of...
4080311 Thermally stable phosphate containing alumina precipitates and their method of preparation  
Thermally stable composite precipitates containing aluminum phosphate and alumina and having a surface area of from about 100 to about 200 m 2 /g together with an average pore radius of from 75 to...
4077912 Catalysts useful for exothermic reactions  
Catalysts which are excellent for exothermic reactions have been discovered. These catalysts consist of an essentially inert support having a strongly adherent outer coating of active catalytic...
4071471 Catalysts for conversion of olefins  
A composition active for the conversion of olefins comprising magnesium oxide and an olefin disproportionation catalyst in admixture.
4066704 Catalytic oxidation  
Alkanes are catalytically oxidized in the absence of ammonia by passing a feed gas including the alkane and oxygen at an elevated temperature over a solid catalyst. The partial pressure of the...
4066572 Phospha-alumina gel and method of preparation  
A novel phospha-alumina gel having a large average pore diameter and a characteristic pore volume distribution is prepared by co-precipitation of aluminum and phosphorus compounds. The gel is then...
4065510 Production of an alkenol from an alkene oxide  
Lithium phosphate catalysts for the rearrangement of alkene oxides to the corresponding alkenols are prepared as overcoats on inert carriers. The catalysts are prepared for example by overcoating...
4049575 Process of producing antimony-containing oxide catalysts  
A process for producing a catalyst comprising an antimony-containing oxide which comprises the steps of (A) calcining a mixture of metal oxides containing, as essential components, an oxide of...
4046821 Oxychlorination of hydrocarbons in the presence of non-halide copper containing catalysts  
Copper chloride has been employed as a reagent for oxychlorination of hydrocarbons. It has now been found that a non-halide copper compound in combination with a rare earth compound is an excellent...
4044053 Preparation of polyalkylene polyamines  
An improved process for selectively preparing a predominantly noncyclic polyalkylene polyamine compound is disclosed wherein an alkyleneamine compound is contacted with a diol compound in the...
4008179 Catalyst composition  
A heat treated catalyst composition containing antimony and to which has been added an oxide or compound of molybdenum or tungsten in an amount such as to provide from 0.05 to 1.0 atom % of...
4005048 Treating hydrocarbons  
Hydrocarbon catalytic reactions (including isomerization, cyclization, aromatization, disproportionation, alkylation, de-alkylation, reforming, hydrcracking) are effected over a catalyst comprising...
3989706 Process for the preparation of pyridines  
A process for the preparation of pyridines, which comprises contacting in the vapor phase saturated or unsaturated hydrocarbon of more than one carbon atom, ammonia, and molecular oxygen, with the...
3974233 Process for the production of a rhenium heptoxide/alumina disproportionation catalyst  
A rhenium heptoxide supported on alumina catalyst is prepared by digesting the alumina support with an aqueous solution of ammonium phosphate, ammonium dihydrogen phosphate or diammonium hydrogen...
3960766 Catalyst for the production of pyridine and 3-methylpyridine  
Catalysts useful in the reaction of acrolein with ammonia to form pyridine and 3-methylpyridine are prepared by heating compounds of Al, F, and O and at least two elements of the second, fourth,...
3948997 Vapour phase oxidation process  
In the oxidation of α, β-diols to α, β-diones with oxygen, the use of a catalyst comprising at least one metal selected from Cu, Ag and Au and at least one element selected from Ge, Sn, Pb, N,...
3946079 Method of condensing ketones  
A process of producing ketone condensation products which comprises condensing at a temperature of from 60° to 300°C. a ketone having 3-19 carbon atoms in the presence of, as a catalyst, at least...
3933932 Method of oxydehydrogenation of ethyl benzene  
Lanthanum phosphate, lanthanum pyrophosphate and rare earth phosphates and pyrophosphates containing a major portion of that lanthanum compound are good catalysts for oxydehydrogenating alkyl...
3932421 Process for producing alkylpyridines  
Alkylpyridines such as 2-picoline and 4-picoline are prepared by contacting acetaldehyde and ammonia in a gaseous phase with a phosphate of two metals such as cobalt magnesium phosphate, cobalt...
3928476 Process for nitration of halogenated benzene derivatives  
A process for nitrating halogenated benzene derivatives, which comprizes reacting a halogenated benzene devirative with nitric acid in the liquid phase in the presence of a catalyst composed of an...
3915893 Amorphous hydrocarbon conversion catalysts and process for preparing same  
Novel amorphous compositions possessing catalytic properties may be prepared by controlled calcination of synthetic crystalline precursor material structurally related to the mineral alunite, said...
3907835 Preparation of maleic anhydride using a catalyst containing a uranyl ion  
A process for converting benzene; an ethylenically unsaturated aliphatic hydrocarbon having from 4 to 5 carbon atoms per molecule and from 1 to 2 olefinic double bonds, and wherein said 4 carbon...
3907918 Process for reducing the induction period of oxydehydrogenation catalysts  
A process for oxidatively dehydrogenating olefins in which that period for bringing the catalyst to its steady-state level of activity is shortened by initiating operations with the catalyst at...
3893946 Dehydration catalysts, particularly for the dehydration of diols  
Dehydration catalysts for vicinal diols prepared by forming an intimate mixture of finely divided solid particles of at least one pyrophosphate and at least one acid orthophosphate of at least one...
3882045 Catalyst composition and production of 2,2-dichloropropionic acid therewith  
A catalyst composition, particularly adapted for use in the production of dichloropropionic acid is provided. The catalyst composition comprises elemental iodine, which may be combined with a...
3879310 Surface stabilized active alumina  
Surface stabilized active alumina having significantly increased thermal stability is made by incorporating 1-20%, preferably 2-18% by weight PO 4 -ion (calculated on the weight of the calcined...
3872216 METHOD FOR PRODUCING PHOSPHATE CATALYST  
A method for producing a phosphate catalyst useful for selective rupturing of ##SPC1## bonds in organic solvents, and, in particular, for splitting 4,4-dimethyl-1,3-dioxane into isoprene, by...
3864279 Tin-Phosphorus Oxidative Dehydrogenation Catalyst  
The activity of tin-phosphorus oxidative dehydrogenation catalysts is significantly improved by including a heat-volatile activity-stimulating ammonium salt in the catalyst composition prior to the...
3852184 ISOMERIZATION OF REFORMER FEED USING A METAL HALIDE/HYDROGEN HALIDE CATALYST  
A process for upgrading reformer feedstocks containing alkylcyclopentanes by isomerizing said feedstock components in the presence of hydrogen and a catalyst mixture containing a metal halide, such...
3846338 METHOD FOR PRODUCING PHOSPHATE CATALYST  
A method for producing a catalyst on the basis of phosphates of metals belonging to Group II for selective rupturing of Bonds in organic compounds, and, in particular, for splitting...
3789078 DEHYDROGENATION  
Dehydrogenation process using an improved catalyst formed from a phosphorus-containing material such as phosphoric acid, a tin material such as tin chloride, and one of a Group Ia or IIa metal or...
3697550 VAPOUR PHASE OXIDATION OF BENZENE TO MALEIC ANHYDRIDE USING AN ALUMINUM PHOSPHATE SUPPORTED CATALYST  
This invention relates to the use of a support of aluminium phosphate in the cristobalite form in a process for the vapor phase oxidation of benzene to maleic anhydride in which a gaseous mixture...
3686346 CATALYTIC DEHYDROGENATION  
In a dehydrogenation process, the feed stream is successively and continuously passed through at least two Sn/O/O catalyst beds wherein the first catalyst bed is essentially free of Group Ia and...
3674747 PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT LINEAR POLYESTERS  
A process for the production of high molecular linear polyesters by polycondensing a glycol with terephthalic acid or a terephthalic acid ester in the presence of a polycondensation catalyst. The...
3673079 CATALYST MANUFACTURE  
Multicomponent catalysts are produced, for example, in the form of rod-like particles, by forming a slurry of gelatinous precipitates of compounds of elements for forming the desired catalyst...
3615216 WATER GAS SHIFT PROCESS FOR PRODUCING HYDROGEN USING A CESIUM COMPOUND CATALYST  
Cesium salts derived from acids having an ionization constant below 1×10 - 3 and carried on a support having high-surface area are used to catalyze the reaction CO+H 2 O CO 2 +H 2 At...
3546254 CATALYTIC DEHYDROCYCLIZATION OF ORTHO-SUBSTITUTED PHENOLS  
3539466 CATALYST PREPARATION  
3538018 BINARY SUPPORT SYSTEM FOR FLUIDIZED CATALYSTS  
3535292 EMULSION POLYMERIZATION WITH ALKALI METAL PEROXYDIPHOSPHATE  
3502595 PREPARATION OF SILICA-ALUMINA,TITANIA-ALUMINA,AND PHOSPHOROUS OXIDE-ALUMINA CATALYSTS  
3481968 PREPARATION OF HALOGENATED AROMATIC ISOCYANATES  
3476809 OLEFIN OXIDATION CATALYST  
3459711 MANUFACTURE OF LINEAR FIBER-FORMING POLYESTERS  
3449436 PURIFICATION OF KETONES  
3448164 OLEFIN SKELETAL ISOMERIZATION AND CATALYST  
3431311 PRODUCTION OF ALKANOLS  
3423331 CATALYST FOR THE PREPARATION OF UNSATURATED ALDEHYDES  
3416884 Crystalline zirconium phosphates  
3409696 Dehydrogenation catalysts comprising bismuth compounds on macroporous supports  
Matches 501 - 550 out of 680 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >