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| Number | Title | Issue Date |
| 7977515 | Formaldehyde synthesis A process is disclosed for the synthesis of formaldehyde from methane starting with the oxychlorination of methane to produce methylene chloride. Hydrolysis of methylene chloride yields the product formaldehyde. Gaseous formaldehyde is condensed for shipment. Byprod... | 07/12/2011 |
| 7790933 | Formaldehyde synthesis A process is disclosed for the synthesis of formaldehyde from methane starting with the oxychlorination of methane to produce methylene chloride. Hydrolysis of methylene chloride yields the product formaldehyde. Byproduct chloroform and carbon tetrachloride are reco... | 09/07/2010 |
| 7381851 | Method for producing formaldehyde A process for preparing formaldehyde by gas-phase oxidation of methanol vapor by means of a gas stream comprising molecular oxygen in the presence of a fixed-bed catalyst comprising iron and molybdenum, wherein the process is carried out in a reactor (1) havi... | 06/03/2008 |
| 7351867 | Catalyst system for aerobic oxidation of primary and secondary alcohols The present invention relates to a process of oxidation of alcohols selectively to aldehydes or ketones with molecular oxygen using a TEMPO based catalyst, Fe-bipyridyl or Fe-phenantroline co-catalyst and N-bromosuccinimide promoter in acetic acid solvent. The oxida... | 04/01/2008 |
| 7301055 | Process for removing methanol from formaldehyde-containing solutions Process for removing methanol from formaldehyde-containing solutions. The present invention relates to a process for removing methanol from formaldehyde-containing solutions, with methanol being converted into formaldehyde dimethyl acetal by reactive distillation in... | 11/27/2007 |
| 7193117 | Methanol oxidation over bulk metal vanadate catalysts A method wherein a methanol-containing gas stream is passed in contact with a catalyst comprising a supported or unsupported bulk vanadate catalyst in the presence of an oxidizing agent for a time sufficient to convert at least a portion of the methanol to formaldeh... | 03/20/2007 |
| 7109382 | Method for the production of formaldehyde A method for formaldehyde production through catalytic oxidation of methanol, comprising the steps of feeding to a first oxidation catalytic bed (2) a gas flow comprising methanol and oxygen at a predetermined crossing linear flow rate, obtaining at the outle... | 09/19/2006 |
| 7084308 | Manufacture of formaldehyde from methyl bromide A process is provided for the manufacture of formaldehyde from methyl bromide. In the process, methyl bromide is oxidized with air over a catalyst to give formaldehyde and hydrogen bromide. In a preferred embodiment of the invention, a mixture of two different catal... | 08/01/2006 |
| 6955792 | Pseudo isothermal catalytic reactor for exothermic or endothermic heterogeneous chemical reactions Heat exchange unit for pseudo-isothermal reactors including a substantially cylindrical shell (2) closed at its opposite ends by respective bottoms (3, 4), at least one thereof is provided with at least one manhole opening (5) of predetermined d... | 10/18/2005 |
| 6956134 | Oxidation of methanol and/or dimethyl ether using supported molybdenum-containing heteropolyacid catalysts Feeds comprising methanol, dimethyl ether or a mixture of the two are oxidized by contacting the feed with an oxygen-containing gas and a supported heteropolyacid catalyst containing molybdenum or molybdenum and vanadium. The primary products are methylal (dimethoxy... | 10/18/2005 |
| 6825384 | Bromine free TEMPO based catalyst system for oxidation of primary and secondary alcohols using NaOCl as an oxidant The present invention relates to a process of oxidation of alcohols selectively to aldehydes or ketones with NaOCl using a TEMPO—borate catalyst system. It is shown that the oxidation can be efficiently carried out without KBr additives under solvent free conditio... | 11/30/2004 |
| 6624332 | In situ formation of metal-molybdate catalysts for methanol oxidation to formaldehyde The method of the present invention involves the in situ formation of metal-molybdate catalyst particles active for methanol oxidation to formaldehyde, with iron as an example, the catalyst is made by mixing particulate forms of Fe2 O3 | 09/23/2003 |
| 6559345 | Dual catalyst bed reactor for methanol oxidation A process and apparatus for oxidizing methanol in a gas stream into formaldehyde in a fixed bed reactor. The process first introduces a gas stream into a fixed bed reactor. The fixed bed reactor contains a catalyst bed having a depth, a width, a length, a... | 05/06/2003 |
| 6552233 | Vanadia-titania/metal-molybdate dual catalyst bed system and process using the same for methanol oxidation to formaldehyde A process and a catalyst reaction zone comprising one or more fixed bed reactors for oxidizing methanol in a reactant gas feed stream to formaldehyde. According to one embodiment, the process comprises introducing the reactant gas feed stream into an upst... | 04/22/2003 |
| 6531635 | Precursors of 3-alkoxyalkanols and processes for the preparation of 3-alkoxyalkanols Processes for the preparation of 3-alkoxyalkanols useful as solvents for coating materials, photoresists, or the like. Specifically, (1) a process which comprises reacting an ,ଲ-unsaturated aldehyde with an alcohol in the presence of an acidi... | 03/11/2003 |
| 6518463 | Metal molybdate/iron-molybdate dual catalyst bed system and process using the same for methanol oxidation to formaldehyde A process and fixed bed reactor for oxidizing methanol in a reactant gas feed stream to formaldehyde. The process comprises introducing the reactant gas feed stream into an upstream region containing a first metal molybdate catalyst (substantially free of... | 02/11/2003 |
| 6504055 | Catalysts and processes for the conversion of succinates to citraconates or itaconates Processes for producing citraconic anhydride and citraconic acid using porous materials with specific surface acidities and surface areas are described. The preferred catalyst is a porous gamma alumina. Itaconic acid is produced from citraconic acid. Itac... | 01/07/2003 |
| 6417376 | Selective oxidation process and catalyst therefor A process for selectively oxidizing an organic molecule by reacting said organic molecule and oxygen in the presence of a selective oxidation catalyst supported on a mesh-like structure.... | 07/09/2002 |
| 6350918 | Alcohol conversion Preparing an aldehyde from an alcohol by contacting the alcohol in the presence of oxygen with a catalyst prepared by contacting an intimate mixture containing metal oxide support particles and particles of a catalytically active metal oxide from Groups V... | 02/26/2002 |
| 6313343 | Process for the preparation of alpha-oxoaldehydes Alkylene glycol is oxidized in a vapor phase in the presence of alcohol (a), oxygen, and a catalyst (a) (primary reaction). -oxoaldehyde, and alcohol (b) or olefin, are oxidized in a vapor phase in the presence of oxygen and a catalyst (b) (seconda... | 11/06/2001 |
| 6265528 | Preparation of polyoxymethylene dimethyl ethers by acid-activated catalytic conversion of methanol with formaldehyde formed by oxy-dehydrogenation of dimethyl ether A particularly useful process which includes the steps of providing a feedstream comprising a soluble condensation promoting component capable of activating a heterogeneous acidic catalyst and a source of formaldehyde formed by conversion of dimethyl ethe... | 07/24/2001 |
| 6198005 | Treating methanol containing waste gas streams A method wherein a methanol-containing waste gas stream, such as a pulp mill waste stream which contains methanol and other waste products, including methyl mercaptans, is passed in contact with a catalyst comprising a supported or unsupported bulk metal ... | 03/06/2001 |
| 6153779 | CuII and ZnII phenoxyl complexes and radical complexes thereof, methods for their preparation and use Quadridentate CuII and ZnII phenoxyl complexes and phenoxyl radical complexes thereof, in which one ligand L is bonded to each metal atom and H2 L stands for the general formula ##STR1## in which the bridge-unit Q sta... | 11/28/2000 |
| 6147263 | Formaldehyde production A process for the catalytic conversion of methanol to formaldehyde wherein a gas stream containing methanol and oxygen is contacted with a silver catalyst in a first conversion zone containing a silver catalyst to produce an effluent containing formaldehy... | 11/14/2000 |
| 6133482 | Method for producing carbonyl compounds In a process for preparing carbonyl compounds of the formula ##STR1## where R1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R2 is a hydrogen atom or a radical of the formula ##STR2## where R3... | 10/17/2000 |
| 6072087 | Method for producing carbonyl compounds The present invention relates to a process for the preparation of carbonyl compounds of the formula ##STR1## in which R1 denotes a hydrogen atom or an alkyl radical containing from 1 to 3 carbon atoms, R2 denotes a hydrogen atom... | 06/06/2000 |
| 5990358 | Process for the preparation of formaldehyde A process for preparing formaldehyde by oxidative dehydrogenation of methanol comprises passing a gas mixture (i) comprising a) from 0.1 to 50% by volume of methanol, b) from 0.1 to 30% by volume of oxygen, c) from 0 to 50% by volume of nitrogen oxide and d) from 0... | 11/23/1999 |
| 5986146 | Process and reactor for heterogeneous exothermic synthesis of formaldehyde A process for the heterogeneous exothermic synthesis of formaldehyde, in particular in a reactor of the type comprising a plurality of adiabatic catalytic beds connected in series, provides the step of feeding to the reactor the methanol necessary for the... | 11/16/1999 |
| 5959154 | Process for heterogeneous exothermic synthesis of formaldehyde A process for the heterogeneous exothermic synthesis of formaldehyde, in particular in reactors of the type comprising a plurality of adiabatic catalytic beds connected in series, provides the step of flowing the gaseous reagents across at least one of th... | 09/28/1999 |
| 5907066 | Treating methanol-containing waste gas streams A method wherein a methanol-containing waste gas stream, such as a pulp mill waste stream which contains methanol and other waste products, including methyl mercaptans, is passed in contact with a catalyst comprising certain supported metal oxides in the ... | 05/25/1999 |
| 5877356 | Process for the continuous preparation of aqueous formaldehyde solutions The process uses a supply column and additional heat exchangers associated with absorption columns. Air and methanol from outside and a subcurrent of methanol, originating from a cold methanol current exiting from the supply column, are fed to the supply ... | 03/02/1999 |
| 5770021 | Process and apparatus for purification of a gas stream containing acrolein A process including a first stage wherein a feed gas stream containing acrolein originating, for example from the gas-phase oxidation of propylene to acrolein, is fractionated into a gaseous effluent and a liquid stream in a cooling column operating such ... | 06/23/1998 |
| 5330958 | Catalyst granules, in particular for the oxidative dehydrogenation of methanol in order to yield formaldehyde A configuration of cylindrical catalyst granules displays a trilobed or triangular cross-section provided with three through-bores equidistant from each other, each of which through-bores has its axis parallel to the axis of the cylindrical granule.... | 07/19/1994 |
| 5326915 | Catalyst granules, in particular for the oxidative dehydrogenation of methanol in order to yield formaldehyde A configuration of cylindrical catalyst granules displays a trilobed or triangular cross-section provided with three through-bores equidistant from each other, each of which through-bores has its axis parallel to the axis of the cylindrical granule (FIG. ... | 07/05/1994 |
| 5138100 | Method for preparing methacrolein A method for preparing methacrolein comprises subjecting isobutylene or a tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst which comprises a mixture of a composition (I) represented by the following gen... | 08/11/1992 |
| 5118868 | Catalyst for preparing aldehyde A catalyst for the partial oxidation of an alcohol to a corresponding aldehyde. The catalyst includes a monolithic structured inert carrier and an active catalytic mixture of oxides of molybdenum and either chromium, vanadium, aluminum, iron, tungsten, ma... | 06/02/1992 |
| 5041686 | Process for the preparation of carbonyl compounds A process for the preparation of carbonyl compounds by the oxydehydrogenation of (C1 -C4)-alcohols is carried out at a temperature from 400° to 700° C. in the presence of a silicate catalyst which has been doped with silver and sil... | 08/20/1991 |
| 4929763 | Alcohol conversion Conversion of alcohol to organic compounds which comprises contacting the alcohol with a heterogeneous catalyst composition comprising at least one member selected from the group consisting of (a) crystalline LnAl1.67+0.67X (B4 O10 | 05/29/1990 |
| 4814513 | Preparation of carbonyl compounds A process for the preparation of carbonyl compounds by oxidation of alcohols in the gas phase with a gas containing oxygen in the presence of catalysts containing copper or silver and a phosphorus compound that is volatile under the conditions of the reac... | 03/21/1989 |
| 4599459 | Method for the ultrasonic treatment of a dilute alcoholic solution A method for the ultrasonic treatment of dilute alcoholic solution in which a vibrator member placed in a dilute alcoholic solution is subjected to ultrasonic vibrations to produce cavitation in the solution in such a way that alcohol in the solution is v... | 07/08/1986 |
