Pritchett; Ralph M. - US Patent Attorneys and Agents

Attorney: Pritchett; Ralph M.

Number of patents: 37
Last date: May 22, 1984

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Number	Title	Issue Date
4450301	Process for converting methanol to formaldehyde In a process for oxidizing methanol to formaldehyde which comprises passing the methanol with molecular oxygen through two sequential silver-based catalysts, with the second of said catalysts being a bed of particulate silver such as, specifically, silver...	05/22/1984
4394355	Recovery of catalytically-useful cobalt and like metal moieties from their solid oxalates with EDTA salts The solid oxalate of a catalytic metal such as cobalt, typically formed as an undesired and useless by-product during the liquid-phase oxidation of an organic compound, typically a hydrocarbon, in the presence of a homogeneous catalyst comprising said met...	07/19/1983
4351729	Biological filter and process A biological filter apparatus, and process for using the same, wherein organic pollutants in a waste water stream may be biologically degraded by a biomass of suitable microorganisms located on the surface of a packing. The filter comprises a sealed vesse...	09/28/1982
4338196	Biological treatment of a formaldehyde-containing waste water contacted with a biomass together with a nitrogen compound In the treatment of a waste water containing formaldehyde by a method which involves introducing the waste water into a biological digestor into which there is also introduced another stream comprising a nitrogen-containing compound, especially ammonia or...	07/06/1982
4329511	Hydroformylation process improved by choice of reaction solvent and control of product stripping parameters In hydroformylating an olefinic compound to produce an aldehyde derivative thereof employing as catalyst a complex of a Group VIII metal and an organic ligand dissolved in an inert liquid reaction solvent with the aldehyde product being continuously strip...	05/11/1982
4301298	Light ends recovery in ethyl acrylate process A normally liquid hydrocarbon having a minimum boiling point of about 425° F. is utilized to provide the liquid seal in a vacuum pump which intakes a gaseous light ends stream resulting from a process for the production of ethyl acrylate by the reaction ...	11/17/1981
4289912	Stabilization of liquid paraformaldehyde The tendency of liquid paraformaldehyde containing water and paraformaldehyde in, for example, approximately 80% to approximately 90% concentration to precipitate solid paraformaldehyde therefrom is retarded by the incorporation thereinto of an effective ...	09/15/1981
4257921	Catalyst for the oxidation of butene A butene may be oxidized in the vapor phase at elevated temperatures to produce acetic acid by reacting the butene with molecular oxygen in the presence of a catalyst comprising a composition of the empirical formula: wherein V is vanadium, Sb is antimony, and...	03/24/1981
4221744	Hydroformylation process employing rhodium-based catalysts comprising ligands having electronegative substituents An improved process for hydroformylating an ethylenically-unsaturated compound to form an aldehyde derivative thereof in the presence of rhodium hydridocarbonyl in complex combination with an organic ligand, characterized by employing as said organic liga...	09/09/1980
4219671	Oxidation of butene to acetic acid A butene may be oxidized in the vapor phase at elevated temperatures to produce acetic acid by reacting the butene with molecular oxygen in the presence of a catalyst comprising a composition of the empirical formula: wherein V is vanadium, Sb is antimony, and...	08/26/1980
4201868	Reaction of methanol with synthesis gas A process for the reacting of methanol with carbon monoxide and hydrogen to produce increased amounts of methyl acetate, acetaldehyde and dimethyl acetal utilizing a catalyst comprising a cobalt carbonyl in complex with an organic nitrogen ligand....	05/06/1980
4198351	Formaldehyde production process An improvement in the process for production of formaldehyde wherein a vapor phase mixture of methanol and air are passed over a silver catalyst, comprising the incorporation of a small amount of a halogen-containing compound into the mixture....	04/15/1980
4193943	Hydroformylation catalysts An organo metallic complex catalyst, useful in the hydroformylation of an olefin, e.g., an alkene, to yield an aldehyde product in which the normal aldehyde isomer predominates over branch-chain isomers, which has the structure: ##STR1## wherein...	03/18/1980
4190606	Process for dehalogenation and/or prevention of halogenation A process for dehalogenation of alpha halogenated carbonyl compounds and/or the prevention of the formation of such. The process for dehalogenation generally comprises causing there to be in solution the halogenated compound, cuprous ions (such as from cu...	02/26/1980
4168391	Production of ethanol from methanol An improvement in the process wherein carbon monoxide and hydrogen are reacted in the liquid phase in the presence of a cobalt carbonyl catalyst whereby increased amounts of ethanol may be produced, which improvement comprises conducting the reaction in t...	09/18/1979
4156633	Acrylic acid purification Acrolein and other light ends are removed from the effluent of a process for the production of acrylic acid by the vapor phase catalytic oxidation of acrolein or an acrolein precursor, such as propylene, by passing the effluent to the base of a fractionat...	05/29/1979
4152344	Phosphino-ferrocene ligands An improved process for hydroformylating an ethylenically-unsaturated compound to form an aldehyde derivative thereof in the presence of rhodium hydridocarbonyl in complex combination with an organic ligand, characterized by employing as said organic liga...	05/01/1979
4151209	Reduction of catalyst deactivation in processes for hydroformylation of olefins with rhodium complex catalysts In a process for hydroformylating an olefin in the presence of a catalyst comprising rhodium in complex combination with carbon monoxide and a triorganophosphorus ligand, progressive deactivation of the catalyst, as well as loss of the ligand species thro...	04/24/1979
4146734	Oxidation of butene to acetic acid and catalyst therefor A butene may be oxidized in the vapor phase at elevated temperatures to produce acetic acid by reacting the butene with molecular oxygen in the presence of a catalyst comprising a composition of the empirical formula: wherein V is vanadium, Ce is cerium, and O...	03/27/1979
4139565	Hydroformylation using improved catalysts comprising rhodium and diphosphino ligands In hydroformylating an ethylenically-unsaturated compound to produce a formyl-substituted derivative using as catalyst rhodium hydrido carbonyl in complex combination with a disphosphino ligand, a high ratio of the normal aldehyde to the iso-aldehyde in t...	02/13/1979
4138420	Hydroformylation catalysts An organo metallic complex catalyst, useful in the hydroformylation of an olefin, e.g., an alkene, to yield an aldehyde product in which the normal aldehyde isomer predominates over branch-chain isomers, which has the structure: ##STR1## wherein...	02/06/1979
4110298	Trioxane production In a process for the manufacture of trioxane by the distillation of aqueous formaldehyde solutions which are intimately mixed with an immiscible, non-volatile, oily liquid phase, the improvement comprising using a monoalkyl ether of a polyoxyalkylene glyc...	08/29/1978
4105701	Purification of materials containing carbonyl contaminants A liquid contaminated with a carbonyl compound, especially an aldehyde, is purified by being contacted with a bed of solid polyvinyl alcohol particles or fibers. The carbonyl compound is adsorbed or chemisorbed onto the solid polyvinyl alcohol surface wit...	08/08/1978
4054590	Production of fatty acids A process for producing fatty acids from C12 to C35 normal alkanes by air oxidizing the alkanes, followed by nitric acid oxidation of the air oxidation product....	10/18/1977
4029636	Method for reducing molybdenum trioxide content of gases issuing from reactors containing molybdenum-based catalysts In high-temperature vapor-phase reaction systems in which there are employed molybdenum-containing catalysts, contamination and/or blockage of downstream processing equipment has been found to be a problem as a result of vaporization of molybdenum trioxid...	06/14/1977
4011252	Production of fatty acids from alkanes by oxidation A process for producing fatty acids from C20 to C30 normal alkanes by air oxidizing the alkanes, followed by hydrogenating the product of the air oxidation and then oxidizing the hydrogenated product by nitric acid oxidation. The cru...	03/08/1977
4008279	Process for dehalogenation and/or prevention of halogenation A process for dehalogenation of alpha halogenated carbonyl compounds and/or the prevention of the formation of such. The process for dehalogenation generally comprises causing there to be in solution the halogenated compound, cuprous ions (such as from cu...	02/15/1977
3983208	Recovery of vanadium and copper catalyst metals using ketones An aqueous nitric acid solution derived from an adipic acid process containing copper and vanadium catalyst values and alkyl dicarboxylic acids is treated to remove the nitric acid and water therefrom so as to obtain a substantially dry, molten-type resid...	09/28/1976
3976595	Sulfonic acid-type catalysts useful in, for example, esterification reactions Sulfonic acid catalysts useful in, for example, esterification reactions and which contain an admixture of any of several phosphorus compounds including specifically ortho-phosphoric acid are much less corrosive toward metal processing equipment than are ...	08/24/1976
3972946	Catalyst activity control in process for converting an alkene to a carbonyl derivative in the presence of a noble metal and redox agent In converting an alkene such as ethylene to a carbonyl derivative such as acetaldehyde by a process which comprises passing the alkene through a tubular reactor along with an aqueous acidic catalyst solution comprising a noble metal such as palladium toge...	08/03/1976
3965166	Oxidation of olefins Process for the oxidation of olefins to the corresponding unsaturated aldehydes and acids, e.g. propylene to acrolein and acrylic acid, by reacting the olefin with oxygen in the presence of a catalyst of the empirical formula Mox Cry...	06/22/1976
3965164	Recovery of oxidation catalyst metals from adipic acid production In a process for the production of adipic acid by nitric acid oxidation of cyclohexanol and/or cyclohexanone wherein copper and vanadium values are recovered by ion exchange means, the improvement which comprises utilizing the off-gas from the nitric acid...	06/22/1976
3962350	Conversion of aromatic aldehydes to phenolic compounds Phenolic compounds, such as phenol itself, are formed by oxidizing the corresponding aromatic aldehyde precursors, in the vapor phase, with molecular oxygen, the gaseous oxidation product being cooled in the presence of an inert diluent to prevent formati...	06/08/1976
3951756	Purification of alkyl esters A distillation process for removing light ends impurities from alkyl esters of carboxylic acids wherein a purified ester is removed as residue, and wherein an inert gas and water are added to the overhead vapors from the distillation so as to facilitate s...	04/20/1976
3947563	Hydrogenolysis of formates Process for hydrogenolysis of an alkali metal or an alkaline earth metal salt of formic acid so as to produce methanol and a metal hydroxide corresponding to the formic acid salt wherein a catalyst of cobalt, rhenium, ruthenium, palladium, platinum or mix...	03/30/1976
3933930	Hexanediol from cyclohexane In the production of 1,6-hexanediol by oxidation of cyclohexane to produce an acidic oxidation product comprising adipic acid, followed by esterification of the acidic oxidation product and a subsequent hydrogenolysis of the ester, the improvement which c...	01/20/1976
3931249	Epoxidation using phthalocyanine catalysts A process for the epoxidation of ethylenically unsaturated compounds with organic hydroperoxides using metal-free phthalocyanines or metal phthalocyanines as catalysts. Suitable metals include those of the metals Ni, Cu, Ag, Ti, V, Zr, Mo. Re, or U....	01/06/1976

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Attorney: Pritchett; Ralph M.