Class 549/489 - Preparation of furfural (i.e., furan-2-aldehyde)

Subclass of Class 549 - Organic compounds -- part of the class 532-570 series
Definition: Processes for the preparation of furfural, per se.
No. of patents: 29
Last issue date: 02/21/2012

Number	Title	Issue Date
8119823	Solvo-thermal hydrolysis of xylose The invention relates to a process for producing furfural from xylose comprising: (a) mixing an aqueous xylose solution containing xylose oligosaccharides with sub-critical or near-critical water to form a mixture at a first temperature and a first pressure; (b) mai...	02/21/2012
7271210	Stabilized ester compositions and their use in film-forming compositions This invention relates to a composition comprising, consisting of or alternatively consisting essentially of a stabilized furfural or glycol ester of a vegetable oil fatty acid and an antioxidant such as butylated hydroxy toluene. This invention also relates to late...	09/18/2007
7173142	Gaseous acid catalysis A method of gaseous acid catalysis which finds particular applications in the manufacture of furfural includes the steps of introducing a solid reactant containing one or more hydroxyl groups into a reactor (1); introducing superheated steam from a superheate...	02/06/2007
6978851	Drill cutting treatment method and apparatus A method and apparatus for treating for disposal oil-contaminated clay substrates such as drill cuttings from drilling with an oil-based mud. If necessary, the substrate is pretreated with an aqueous emulsion breaker such as alkylbenzenesulfonic acid. The substrate ...	12/27/2005
6743928	Process for the manufacture of furfural Process for the manufacture of furfural wherein a pentosan-containing raw material acidified or not, is heated to a temperature T1 by admitting steam through valve 2 while the valves 3 and 4 are closed. During the very short heating process, the steam con...	06/01/2004
6706900	Process for preparing 2,5-diformylfuran from carbohydrates 2,5-Diformylfuran is prepared from a source of fructose in a one-pot, two-step reaction, in a single solvent system process, using a vanadium catalyst. ...	03/16/2004
6642396	Process for the production of furfural from lignosulphonate waste liquor A process for the production of furfural from lignosulphonate waste liquor which contains pentose is described, the process essentially comprising the maintenance of a boiling condition of the liquor at predetermined pressures for a sufficient time to con...	11/04/2003
6603026	Heterocyclic compounds produced from biomass Sugars derived from acidic hydrolysis of biomass consist of glucose and xyloses which are subjected to dehydration, within the hydrolysis environment, to form heterocyclic compounds, furfural and hydroxymethylfurfural. By providing a vessel for hydrolysis...	08/05/2003
6441202	Heterocyclic compounds extracted by a hydrocarbon Sugars derived from acidic hydrolysis of biomass consist of glucose and xyloses which are subjected to dehydration, within the hydrolysis environment, to form heterocyclic compounds, furfural and hydroxymethylfurfural. By providing a vessel for hydrolysis...	08/27/2002
6353119	Preparation of 3-substituted-4-arylquinolin-2-one derivatives The present invention relates to a process for the preparation of 3-substituted-4-arylquinolin-2-one derivatives from a substituted coumarin and using a photochemical cyclization method on a dihydrofuran intermediate....	03/05/2002
6274741	Process for the preparation of acyl heteroaromatic compounds from heteroaromatic compounds by metal ion exchanged clays The present invention relates to a process for the preparation of the acyl heteroaromatic compounds useful as important intermediates for drugs, pharmaceuticals and flavouring agents, said process comprising reacting an heteroaromatic compound selected fr...	08/14/2001
6054611	Method for the production of levulinic acid and its derivatives A method of producing dehydration products from one more 5-carbon or 6-carbon sugars includes reacting said one or more sugars at 40-240° C. for 1 to 96 hours in the presence of 5-90% sulfuric acid, separating the reaction products, and recovering levuli...	04/25/2000
5892107	Method for the production of levulinic acid A method of producing dehydration products from one or more 5-carbon or 6-carbon sugars includes reacting said one or more sugars at 40°-240 ° C. for 1 to 96 hours in the presence of 10-90% sulfuric acid, separating the reaction products, and recovering...	04/06/1999
5608105	Production of levulinic acid from carbohydrate-containing materials A continuous process for producing levulinic acid from carbohydrate-containing materials in high yields is described. According to the process, a carbohydrate-containing material is supplied continuously to a first reactor and hydrolyzed at between 210° ...	03/04/1997
4916242	Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural In a combined process for the thermal and chemical treatment of lignocellulose-containing biomass and for the production of furfural, biomass is supplied to a cooker in batches, is heated in the cooker under the addition of cooking liquor, and cellulose o...	04/10/1990
4912237	Process for producing furfural A feed suspension of pentosan-containing organic raw materials in dilute sulfuric acid is passed with low residence time through a flow reactor heated by high-pressure steam to 170°-230° C. and then through a cooler in which it is cooled to 140°-200° ...	03/27/1990
4897497	Lignocellulose degradation to furfural and levulinic acid A process for producing furfural and levulinic acid from lignocellulose includes subjecting a sample of lignocellulose to acid degradation at an elevated temperature for a minute or less, during which time at least fifty percent of the furfural that theor...	01/30/1990
4824956	Reductive dehalogenation of halogen compounds Aliphatic, cycloaliphatic, aromatic or araliphatic halogen compounds are reductively dehalogenated by reaction with hydrocarbons in the presence of carbon in the liquid phase at from 100° to 450° C. with formation of hydrogen halides....	04/25/1989
4533743	Furfural process Furfural yield and selectivity are maximized by reacting a 1 to 10 percent pentose 0.05 to 0.2 normal mineral acid aqueous solution in a plug flow reactor operated at a temperature between 220° C. and 300° C. The reaction residence time is short and is ...	08/06/1985
4433155	Inhibitors for furfurals Furfural or derivatives thereof, especially 5-chloromethyl furfural, is inhibited against the formation of resinous decomposition products by addition of epoxy compounds such as the reaction product of epichlorohydrin and bisphenol A....	02/21/1984
4401514	Method for the recovery of furfural, acetic acid and formic acid A method of recovering or extracting chemicals, such as furfural, formic acid, acetic acid and other organic compounds from acidic hydrolysates of plants or vegetable matter, especially spent sulfite liquors after conversion of the pentosans into pentoses...	08/30/1983
4376208	Hydroformylation of dihydrofuran A hydroformylation process is disclosed in which unsaturated cyclic ethers, such as unsaturated furans can be hydroformylated in good yield and under relatively mild conditions....	03/08/1983
4366322	Method for the production of furfural from vegetable matter Process and apparatus for producing furfural from plant materials. The hydrolysis of pentosanes contained in plant materials is effected in a first reactor (2) in the presence of a strong concentrated acid, at 20°-70° C., at atmospheric pressure, and de...	12/28/1982
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....	08/03/1982
4156076	Process for the conversion of lactose into monosaccharides and derivatives thereof The invention relates to a process for the conversion of lactose into useful monocarbohydrates, comprising the steps of oxidatively hydrolyzing a lactose solution to form galactose and gluconic acid, and separating these two constituents....	05/22/1979
4154744	Process for producing a furan derivative A process for producing furan derivatives of the formula, ##STR1## wherein R is hydrogen, methyl or chloromethyl, which comprises reacting a mono- or a disaccharide with hydrochloric acid in a mixture containing water, an organic solvent and a cataly...	05/15/1979
4076733	Process for the preparation of furfural The invention relates to a process for the preparation of furfural from a carbohydrate, comprising subjecting a lactose-containing material to steam distillation, whereby at least part of the lactose present is converted to furfural....	02/28/1978
4017421	Wet combustion process Aqueous solutions and suspensions of solid particles, even those containing less than one percent of organic materials, may be combusted with air, oxygen, or their mixtures in a process which provides for preheating in countercurrent batches of the raw or...	04/12/1977
4001283	Method for the manufacture of furfural using hydrogen chloride A method for producing furfural from pentosan-containing materials wherein steam and a volatile acid catalyst are introduced into a bed of the pentosan-containing material, the moisture content of which is minimized....	01/04/1977

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Class 549/489 - Preparation of furfural (i.e., furan-2-aldehyde)