Class 568/806 - Preparing by pyrolysis (e.g., by cracking, etc.)

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes which include preparing the compound by decomposing
No. of patents: 35
Last issue date: 01/09/2007

Number	Title	Issue Date
7161048	Method for deriving methanol from waste generated methane and structured product formulated therefrom Methanol is produced from bacterially oxidized waste methane by reaction with Pd+2, Cu+2, air, and molten phthalic anhydride in an entrained oxidizer generating half ester of methyl phthalate which is reaction distilled to produce methanol and ...	01/09/2007
6765117	Process for stereoselective synthesis of prostacyclin derivatives An improved method is described for making 9-deoxy-PGF1-type compounds. In contrast to the prior art, the method is stereoselective and requires fewer steps than the known methods for making these compounds. The invention also relates to novel intermediat...	07/20/2004
6646097	Method for purifying 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane and methods of producing polycarbonates therefrom A method for purifying 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane comprises dissolving said 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane in a first solvent consisting essentially of an alcohol to form a first solution; filtering said first solution;...	11/11/2003
6459004	Cleavage method of bisphenols A cleavage method of bisphenols capable of yielding a product containing high-purity isopropenylphenol and phenol is disclosed, including (1) a cleavage step of supplying the mixture containing bisphenols together with chroman derivatives and flavan deriv...	10/01/2002
6399838	Process for preparing 2,6-dimethylphenol A process for preparing 2,6-dimethylphenol from 2,4,6-trimethylphenol is provided. The process includes two steps: (1) selective oxidation of 2,4,6-trimethylphenol to 3,5-dimethyl-4-hydroxybenzaldehyde and (2) deformylation of the resulting benzaldehyde t...	06/04/2002
6303835	Method for recovering material values from bisphenol tars Phenol and isopropenylphenol are recovered from BPA tars by sparging the fluidized BPA tar while heating in the presence of a basic catalyst. Sparging dramatically increases the efficiency of phenol and isopropenylphenol recovery. Recovered isopropenylphe...	10/16/2001
6291723	Diolefin/hydroxyaryl condensates and catalyst therefor A catalyst composition comprising trifluoromethanesulfonic acid (also referred to as triflic acid) and a sufficient quantity of a substance (also referred to as a retarder) to decrease but not eliminate the catalytic activity of the acid is disclosed. Als...	09/18/2001
6187964	Method of producing phenol compound A method of producing a phenol compound comprising a step of oxidizing an aromatic aldehyde to an aryl formate and an aromatic carboxylic acid with an oxygen-containing gas, and a step of decomposing the aryl formate to the phenol compound. To facilitate ...	02/13/2001
5300704	Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products A process of using fast pyrolysis in a carrier gas to convert a plastic waste feedstream having a mixed polymeric composition in a manner such that pyrolysis of a given polymer to its high value monomeric constituent occurs prior to pyrolysis of other pla...	04/05/1994
5260461	Ligands for ADH: cinchona alkaloids and moderately sized organic substituents linked through a planar aromatic spacer group Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, an aqueous solution, a base, a ferricyanide salt and an osmium-containin...	11/09/1993
5198591	Method to manufacture bisphenol A The invention relates to a process for obtaining a high purity bisphenol from a post-reaction mixture resulting from the step of synthesis of phenol and acetone in the presence of a strong acid cation exhanger catalyst, by the way of crystallation and sep...	03/30/1993
5136111	Controlled catalytic and thermal sequential pyrolysis and hydrolysis of phenolic resin containing waste streams to sequentially recover monomers and chemicals A process of using fast pyrolysis in a carrier gas to convert a waste phenolic resin containing feedstreams in a manner such that pyrolysis of said resins and a given high value monomeric constituent occurs prior to pyrolyses of the resins in other monome...	08/04/1992
4960958	Catalysts for catalytic pyrolysis of phenol distillation residue and process for recovering useful substances by pyrolysis the same The catalysts for use in pyrolytic decomposition of the phenol distillation residue in accordance with the present invention are used in pyrolytically decomposing a distillation residue resulting from the separation by distillation of cumene, phenol and a...	10/02/1990
4900873	Method of manufacturing phenols from lignin Phenols such as cresol, phenol and xylenol etc. are obtained by thermal decomposition of a lignin-containing material in a state of a mixture of the lignin-containing material and a double ring aromatic hydrocarbon solvent. Spent liquid of a solvolysis pu...	02/13/1990
4873376	Process for the production of monomeric alkenylphenols from dihydroxydiphenylalkanes The invention relates to a process for the production of monomeric alkenylphenols from dihydroxydiphenylalkanes by thermal cleavage in certain solvents....	10/10/1989
4754081	Process for dearylation of alkylenebisphenols and alkyltrisphenols Alkylenebisphenols and alkyltrisphenols are dearylated under mild conditions of temperature and pressure in the absence of HF to obtain alkyl and/or alkenyl substitute or phenols and other related polymer products....	06/28/1988
4717777	Process for preparing p-isopropenyl phenol A process for the preparation of alpha-alkenyl aromatic compounds, such as p-isopropenyl phenol, via the cleavage of cleavable organic compounds, e.g. dihydroxydiaryl alkanes such as bisphenol A, wherein an improved alkaline catalyst is employed. The cata...	01/05/1988
4695659	Method for dealkylation of alkyl-aryl ethers A method is disclosed for the dealkylation of alkylaryl ethers by reaction with aluminum triodide under reflux. The reaction is carried out in the presence of a catalytic amount of a quaternary ammonium iodide in a substantially non-aqueous organic solven...	09/22/1987
4657890	Catalyst for preparing p-isopropenyl phenol An improved alkaline catalyst which is especially useful in the preparation of alpha-alkenyl aromatic compounds, such as p-isopropenylphenol, via the cleavage of cleavable organic compounds, e.g., dihydroxydiaryl alkanes such as bisphenol A....	04/14/1987
4533769	Method of making methylated phenol from methylated cyclohexeneone A method is provided for making 3,5-dimethylphenol from isophorone by catalytic demethanation using as a catalyst, the calcination residue of a mixture of magnesium carbonate and/or magnesium hydroxide and a manganese compound....	08/06/1985
4476330	Conversion of ethers using a zeolite catalyst Conversion, e.g. dehydration of aliphatic organic oxygenates having up to about 6 carbon atoms by contact with a crystalline aluminosilicate zeolite, preferably ZSM-5, having a silica to alumina ratio substantially greater than 10, at a temperature of abo...	10/09/1984
4453025	Process for the preparation of 3,5-xylenol Isophorone is converted to 3,5-xylenol in the vapor phase in the presence of a heterogeneous catalyst comprising a particular combination of multiple rare earth metals on an alumina support or one or more rare earth metals in combination with one or more ...	06/05/1984
4420644	Lignin hydrocracking process to produce phenol and benzene A lignin-containing feed material in particulate form is mixed with a process-derived slurrying oil and fed into an ebullated catalyst bed hydrocracking reactor. Reaction conditions are maintained at 650°-850° F. temperature, 500-2500 psig hydrogen part...	12/13/1983
4381413	Process for converting anisoles to ortho-methylated phenolic products A process for converting anisoles to ortho-methylated phenolic products in high selectivity is disclosed. The process comprises passing methoxybenzene, o-methylmethoxybenzene, 2,6-dimethylmethoxybenzene, or mixtures thereof, over gamma-alumina in the pres...	04/26/1983
4375566	Process for producing ortho-alkylated phenols from anisoles A process for producing selectively o-alkylated phenols wherein an anisole having at least one ortho positioned hydrogen atom is contacted with a mixed oxide catalyst in the vapor phase....	03/01/1983
4351966	Phenol recovery from bisphenol-A waste streams Bisphenol-A waste stream derived from the reaction of phenol and acetone in the presence of an acidic condensing agent can be treated with a molecular sieve to obtain good yields of phenol present in the effluent stream either in isolated form or as part ...	09/28/1982
4283567	Method for recovering resorcinol In a method for recovering resorcinol by thermally cracking high-boiling by-products formed by the acid-cleavage of m-diisopropylbenzene dihydroperoxide in the presence of at least one ammonium compound selected from the group consisting of ammonium sulfa...	08/11/1981
4258221	Cleavage of alkylenebisphenols Alkylenebisphenols are converted or cleaved to phenols and alkyl- and/or alkenyl-substituted phenols in good yields by contacting with hydrogen in the presence of a nickel oxide/manganese oxide/metal oxide supported catalyst. In a specific embodiment, bis...	03/24/1981
4245128	Process for cleaving dihydroxydiphenyl alkanes A novel process for producing alkenyl phenols, which comprises continuously feeding a dihydroxydiphenyl alkane such as 2,2-(4,4'-dihydroxydiphenyl)propane, 2,2-(4,4'-dihydroxy-3,3'-dimethyldiphenyl)propane, 2,2-(4,4'-dihydroxydiphenyl)butane, 2,...	01/13/1981
4242528	Process for preparing isopropenyl phenol A novel process for producing isopropenyl phenol such as p-isopropenyl phenol which comprises continuously feeding oligomers of isopropenyl phenol having a degree of polymerization of 2 to 5 into a high-boiling inert organic reaction medium such as an alk...	12/30/1980
4230895	Thermal hydrodealkylation of alkyl phenols The present invention provides a process, for the thermal dealkylation of alkylated phenols, which process comprises reacting a feed solution containing alkylated phenols and gaseous hydrogen in the presence of water vapor, the reaction being carried out ...	10/28/1980
4227012	Oxidation of methyl benzenes in the presence of acetic acid and a dehydrating agent Oxidation of methyl benzenes with air or oxygen to form a phenolic acetate and formaldehyde or methylene diacetate may be carried out in the presence of acetic acid, phosphorus pentoxide, benzaldehyde and an acid catalyst. The resulting acetates may then ...	10/07/1980
4225414	Process for hydrocracking carbonaceous material to provide fuels or chemical feed stock A process is disclosed for hydrocracking coal or other carbonaceous material to produce various aromatic hydrocarbons including benzene, toluene, xylene, ethylbenzene, phenol and cresols in variable relative concentrations while maintaining a near constan...	09/30/1980
4225728	Catalytic process for the conversion of ethyl benzene to equimolar amounts of vinyl acetate and phenol Equimolar amounts of vinyl acetate and phenol may be prepared by oxidation of ethyl benzene. The catalytic oxidation, of ethyl benzene, when carried out in the presence of acetic anhydride, forms phenyl acetate and ethylidene diacetate. Pyrolysis of these...	09/30/1980
4131749	Method for waste recovery from a process of the production of diphenylolpropane The essence of the invention consists in heating the dian waste in the presence of sodium hypophosphite as a catalyst in amount of 0.01 - 0.5% by weight at a temperature of 150 to 250° C and under reduced pressure in the range of 5 to 50 mm Hg. As a resu...	12/26/1978

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Class 568/806 - Preparing by pyrolysis (e.g., by cracking, etc.)