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4436835 |
Process for preparation of catalysts
Disclosed is a process for the preparation of a catalyst for the synthesis of methyl formate by dehydrogenating methanol in the gaseous phase, said process being characterized in that (A) at least...
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4429075 |
Cross-linked urea-formaldehyde polymer matrix compositions containing cyclic intermediate structures
A cross-linked urea-formaldehyde polymer matrix is formed by catalyzing, using a buffered acid as the catalyst, an aqueous mixture of a urea-formaldehyde concentrate, urea-formaldehyde resin, and...
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4427575 |
Catalyst
A catalyst comprising essentially zirconium phosphate and at least one of chromium and thorium.
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4423155 |
Dimethyl ether synthesis catalyst
A new catalyst and process for synthesis of dimethyl ether from low H 2 /CO ratio syngas are disclosed. The catalyst is a combination of Cu, Zn and Al, co-precipitated in predetermined relative...
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4419270 |
Oxidation catalyst
A catalyst for the vapor-phase oxidation of an unsaturated hydrocarbon, alcohol, saturated aliphatic aldehyde or unsaturated aliphatic aldehyde having 4 carbon atoms, said catalyst comprising a...
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4416803 |
Process for the manufacture of catalysts useful for the oxidation of butane to malelic anhydride
A process for the manufacture of a phosphorus/vanadium/metal oxide catalyst suitable for the oxidation of butane to maleic anhydride can be prepared by reacting orthophosphoric acid in an aliphatic...
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4414133 |
Catalytic composition
There is disclosed a catalytic composition represented by the formula: (Mo) a (W) b (Bi) c (Pb) d (Sb) e (A) f (B) g (C) h (P) m (O) n in which A is iron and/or chromium, B is cerium...
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4410450 |
Process for producing fluid catalyst having good activity from coarse catalyst
A process for producing a fluid catalyst having good activity from a coarse catalyst wherein said fluid catalyst is suitable for oxidation, ammoxidation or oxidative dehydrogenation reaction of...
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4410448 |
Method for controlling the change in the crush strength of a catalyst particle during finishing calcination
The change in the crush strength of a catalyst particle as it is transformed from a catalyst precursor to a finished catalyst by calcination is controlled by the method comprising: 1. Preparing...
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4409418 |
Isomerization process
An aliphatic mono-olefin e.g. butene-2, is isomerized in the presence of a catalyst comprising essentially zirconium phosphate and at least one of chromium and thorium to produce the corresponding...
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4407733 |
Supported catalysts and process for their preparation
A process for the preparation of a supported catalyst containing a catalytically active metal such as a noble metal is disclosed wherein the supported catalyst is prepared by initially contacting...
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4407732 |
Catalytic supports with controlled pore properties
A catalyst support suitable for use in a cracking process or hydrotreating process. The catalyst support comprises a magnesia-alumina-aluminum phosphate matrix which has outstanding thermal stability.
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4400306 |
Process for the preparation of fluidizable catalysts
A process is provided for preparing supported catalysts by impregnating a pre-formed support with a solution of a metal alkoxide and contacting the impregnated support with a solution of at least...
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4400568 |
Process for preparing styrene, and an appropriate agent
The invention relates to a process for oxidatively dehydrogenating dehydrogenatable organic compounds to prepare styrene. In this process, the compounds mentioned are reacted in the vapor phase...
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4396536 |
Preparation of vanadium phosphorous catalysts using olefinic oxygenated media
The present invention provides a process for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation...
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4394255 |
Isomerization process
An aliphatic mono-olefin e.g. butene-2 is isomerized in the presence of a catalyst comprising zirconium phosphate and zirconium phosphate prepared from an aryl phosphonic acid to produce a...
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4394297 |
Zinc titanate catalyst
The catalytic oxidative dehydrogenation of at least one dehydrogenatable organic compound which has at least one ##STR1## grouping is carried out in the presence of a zinc titanate catalyst. The...
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4392984 |
Olefin oligomerization catalysts and a process for their preparation
Catalysts, for olefin oligomerization, whose active material has the empirical formula I APO 4 .[P 2 O 5 .(H 2 O) n ] a . (XY) b I where A is boron, antimony, bismuth, aluminum and/or 3...
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4384949 |
Pretreating hydrocarbon feed stocks using deactivated FCC catalyst
Whole crude and residual fractions from distillation of petroleum and like feed stocks are subjected to selective vaporization to prepare heavy fractions of reduced Conradson Carbon and/or metals...
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4381993 |
Process for treating hydrocarbon feedstocks with CO and H.sub.2 O in the presence of steam stable catalysts
Hydrocarbon feeds are treated to remove sulfur, nitrogen, oxygen, metals and/or other impurities by contact with treating gas comprising carbon monoxide and water under reaction conditions in the...
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4376067 |
Catalytic supports with controlled pore properties
A catalyst support suitable for use in a cracking process or hydrotreating process having outstanding thermal stability comprising (I) a selected Group IIB metal compound, combinations thereof, and...
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4370259 |
Oxidative dehydrogenation catalyst
Hydrocarbons are oxidatively dehydrogenated in the presence of a catalyst comprising a mixture of oxides of manganese, phosphorus, and an alkali metal, optionally, supported on a refractory oxide....
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RE31093 |
Process for making activated carbon with control of metal ion concentration in phosphoric acid
A process for improvement of wood-base active carbon made in the presence of phosphoric acid is disclosed herein. The improvement comprises controlling the amount of dissolved salts of the group...
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4359401 |
Method of regeneration of an iron phosphate-type catalyst
A method of regenerating an iron/phosphate-type catalyst typically used for the oxydehydrogenation of lower molecular weight carboncylic acids comprising the step of subjecting the catalyst to an...
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4349462 |
Catalytic material
A fixed-bed catalytic material comprises iron impregnated Alundum carrying a coating of copper oxide on its outside surfaces. By means of the coating, the growth of carbon fibers as a result of the...
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4342698 |
Olefin oxidation process
Oxole compounds, e.g. furan, are produced by contacting alkenes and/or alkadienes with molecular oxygen in the presence of an antimony catalyst.
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4342666 |
Enhancement of trilithium phosphate catalyst activity
A method for enhancing the activity of a trilithium phosphate catalyst, useful for isomerizing alkylene oxides to the corresponding alcohols, in which dry catalyst is contacted with an aqueous...
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4324908 |
Preparation of unsaturated acids and esters from saturated carboxylic acid derivatives and carbonyl compounds over phosphate catalysts
Promoted phosphate catalysts have been found to be effective for the vapor phase condensation of saturated monocarboxylic acids or esters with formaldehyde, to produce unsaturated carboxylic acids...
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4322368 |
Copper-promoted antimony phosphate oxide complex catalysts
Oxide complexes comprising copper-promoted antimony phosphates have been found to exhibit significant catalytic activity in various oxidation-type reactions such as the ammoxidation of propylene to...
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4316856 |
Molybdenum-promoted antimony phosphate oxide complex catalysts also containing at least one of bismuth and tellurium
Molybdenum-promoted antimony phosphates also containing at least one of tellurium and bismuth have been found to exhibit significant catalytic activity in various oxidation-type reactions.
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4314056 |
Catalyst for and method of preparing cellulose esters
Disclosed is a catalyst composition and a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75° C. and about 110° C. a...
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4310440 |
Crystalline metallophosphate compositions
A novel family of crystalline, microporous aluminophosphate compositions is synthesized by hydrothermal crystallization at elevated temperatures of aluminophosphate gels containing a molecular...
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4302357 |
Catalyst for production of ethylene from ethanol
An activated alumina catalyst containing alkali metal, sulfur, iron and silicon in an amount of 0.05 wt. % or less respectively, calculated as Na 2 O, SO 3 , Fe 2 O 3 and SiO 2 and having a...
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4252680 |
Oxidative dehydrogenation catalyst preparation
In the precipitation of a tin-containing component and a phosphorus-containing component from an acid solution with a base to prepare a catalyst of improved selectivity to produce diolefin from...
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4252635 |
Sulfur oxides control in cracking catalyst regeneration
In removing sulfur oxides from flue gas in a cracking catalyst regenerator in the presence of a silica-containing particulate catalyst by reacting the sulfur oxides with alumina in a particulate...
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4246247 |
Method of preparing a calcium phosphate catalyst
Disclosed is a method of preparing a calcium phosphate catalyst, which comprises reacting a calcium salt with a phosphoric acid salt in aqueous ammonia, separating the precipitate resulting from...
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4233246 |
Manufacture of aliphatic hydroxycarbonyl compounds etherified with aliphatic groups
Aliphatic hydroxycarbonyl compounds etherified with aliphatic groups are prepared by oxidizing hydroxyalcohols in the presence of a metal catalyst which consists of one or more layers, each of a...
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4233183 |
Process for producing plate-shaped denitrating catalyst
A plate-shaped denitrating catalyst is produced by the steps of preparing a slurry from hydrated titania and a sol selected from the group consisting of silica sol, alumina sol and titania sol,...
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4215017 |
Catalyst for disproportionation/double-bond isomerization of olefins
Double bond isomerization and disproportionation of olefins is obtained by contact with a catalyst in a single-stage composition containing a support, uranium, and at least one of tungsten,...
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4197415 |
Process for preparing cyclic olefins by selective partial hydrogenation of aromatic hydrocarbons
Aromatic hydrocarbons are selectively partially hydrogenated to cyclic olefins by contacting the aromatic hydrocarbon with hydrogen and a ruthenium catalyst in an aqueous dispersion containing a...
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4182745 |
Catalyst for reducing nitrogen oxides in a waste gas and a process for catalytically reducing nitrogen oxides contained in a waste gas
The present invention relates to a catalyst comprising at least a metal salt of heteropoly-acid, which is composed of a sort of heteropoly-acid and one or more metals selected from a group of the...
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4169865 |
Production of aromatic hydrocarbons
A process for the dimerization and cyclization of isobutene to form, as preferred product, paraxylene in which the whole of the product of isobutene dimerization (including unreacted feedstock) is...
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4166806 |
Cracking catalyst passivated with a crude antimony phosphorodithioate
A hydrocarbon cracking catalyst is treated with a crude antimony tris-(O,O-dihydrocarbyl phosphorodithioate) to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or...
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4132669 |
Process for preparing phosphorous-alumina catalysts using polycarboxylic acids as extrusion aids
Alumina-phosphorous powders can be extruded into catalysts supports having improved properties by the addition of up to 15% by weight of a polycarboxylic acid, containing 2-10 carbon atoms, based...
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4131567 |
Catalyst for cationic polymerization process
There is provided a process for cationically polymerizing piperylene batchwise or continuously by the addition of piperylene either alone or in admixture with a minor amount of at least another...
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4119568 |
Solid supported catalysts for catalytic reduction of nitrogen oxides in waste gases
Solid supported catalysts for catalytic reduction of nitrogen oxide in waste gases utilizing ammonia as the reducing agent, the catalyst comprising at least one metallic oxide, sulfate or phosphate...
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4118588 |
Manufacture of methacrylic acid and methyl methacrylate
Methacrylic acid and methyl methacrylate are manufactured by reacting, respectively, propionic acid and methyl propionate with dimethoxymethane in the presence of catalysts based on phosphates...
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4113660 |
Production of shaped catalysts or carriers comprising titanium oxides
A process for preparing shaped catalysts or carriers mainly containing titanium oxide and improved in mechanical strength which comprises calcining a material mainly comprising titanium oxide or a...
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4112006 |
Process for nitrating toluene
Toluene is nitrated with nitric acid in the gaseous phase under reduced pressure and at temperatures from about 80° - 180° C, while using an acidic inorganic catalyst consisting of a carrier...
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4088443 |
Aluminum chlorhydroxide-phosphoric acid catalyst system for flash cure treatments to give improved durable-press properties in cellulose-containing textiles
An aluminum chlorhydroxide-phosphoric acid catalyst system has been devised that is practical for treatments of cellulose-containing textile materials with formaldehyde and formaldehyde-amide...
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