Class 203/44 - Of distillate

Subclass of Class 203 - Distillation: processes, separatory
Definition: Processes in which the extracted liquid is a distillate.
No. of patents: 29
Last issue date: 10/23/2007

Number	Title	Issue Date
7285187	Method of purifying propylene oxide A process for purifying propylene oxide characterized by subjecting a liquid reaction mixture containing propylene oxide, and water, hydrocarbons and oxygen-containing organic compounds as impurities obtained by reacting cumene hydroperoxide with propylene to extrac...	10/23/2007
7128815	Process for recovery of pure acrylonitrile Process for recovery of highly pure acrylonitrile by quickly vaporizing under vacuum the contaminated acrylonitrile as well as fresh acrylonitrile followed by contacting with hydrophilic agents in an extractive distillation column using plural number of packed secti...	10/31/2006
6926810	Process for obtaining an organic acid from an organic acid ammonium salt, an organic acid amide, or an alkylamine organic acid complex Disclosed herein are methods for the recovery of an organic acid, such as a heat stable lactic acid, from a feed stream which contains at least one of an organic acid amide, an organic acid ammonium salt, or an alkylamine-organic acid complex. The feed stream is mix...	08/09/2005
6610638	High purity 1,3-propanediol derivative solvent, process for producing the same, and use thereof The present invention No. I is to obtain a high purity 3-alkoxy-1-propanol having the content of alcoholic impurities of not more than 0.3% by weight by allowing to react acrolein with a linear or branched alcohol having a carbon number of 1-4 using acrol...	08/26/2003
6500311	Propylene oxide purification A mixture of propylene oxide and methanol is separated by liquid/liquid extraction using water and a hydrocarbon such as n-octane as extractive solvents....	12/31/2002
6294055	Process for the separation of hydrogen fluoride from its mixtures with a hydrofluoroalkane containing from 3 to 6 carbon atoms Process for the separation of hydrogen fluoride from its mixtures with a hydrofluoroalkane containing from 3 to 6 carbon atoms, by extraction using an organic solvent....	09/25/2001
6254781	Method for recycling ferrofluid constituents used in a materials separation process Ferrofluid coated particles resulting from a ferrofluid materials separation process are washed with a solvent which is the same material as the liquid carrier employed in the ferrofluid. The result is a "dirty" solvent which is a very weak ferrofluid. Th...	07/03/2001
6093286	Process for purifying n-butyl chloride A process for purifying at least 90% pure n-butyl chloride which is present in a mixture with other C1 to C4 alkyl chlorides, C1 to C4 alcohols, esters, ketones, nitrites, and organic sulfur compounds. In this p...	07/25/2000
6047560	Process for separating pentafluoroethane and 1,1,1-trifluoroethane A process for separating pentafluoroethane and 1,1,1-trifluoroethane, which comprises extraction distilling a mixed fluid comprising pentafluoroethane and 1,1,1-trifluoroethane in the presence of at least one extracting agent selected from the group consi...	04/11/2000
5925224	Method of and apparatus for purifying a solvent A solvent containing low-boiling and high-boiling impurities in an evaporating section, so that the high-boiling impurities is left as a tank bottom waste, and a solvent vapor from the section is guide through a mist separator into a condenser. A condensa...	07/20/1999
5763694	Separating 3-methyl-1-butanol from 1-pentanol by azeotropic distillation 3-Methyl-1-butanol cannot be separated from 1-pentanol by distillation or rectification because of the closeness of their boiling points. 3-Methyl-1-butanol is readily separated from 1-pentanol by azeotropic distillation. Effective agents are methylcycloh...	06/09/1998
5763695	Separation of 3-methyl-1-butanol from 1-pentanol by extractive distillation 3-Methyl-1-butanol cannot be separated from 1-pentanol by distillation or rectification because of the closeness of their boiling points. 3-Methyl-1-butanol is readily separated from 1-pentanol by extractive distillation. Effective agents are butyl benzoa...	06/09/1998
5603813	Purifying distillation of vinyl formate Vinyl formate containing formic acid, acetaldehyde and water following synthesis is separated from formic acid and water in a first distillation stage and from acetaldehyde in a second stage to give pure vinyl formate....	02/18/1997
5194122	Method for recovering volatile, organic compounds from manure A method for recovering volatile, organic compounds from manure, by: i) acidifying and concentrating the manure; ii) condensing the formed vapor; and iii) separating the volatile, organic compounds from the condensate. Preferably the volatile, organic compounds are remo...	03/16/1993
5110319	Process for extracting ethanol from fermentation broths for direct blending into gasoline while preserving the broth for recycling A method of producing ethanol from a fermentation source for direct blending into gasoline to form gasohol is provided by extracting ethanol from the fermentation broth with a non-toxic solvent compatible with gasoline. The invention includes extraction o...	05/05/1992
4931145	Separation of benzene from acetone by azeotropic distillation Acetone cannot be easily separated from benzene in high purity by distillation because of the closeness of their vapor pressures. Acetone can be readily removed from benzene by azeotropic distillation using certain aromatic hydrocarbons. Typical effective...	06/05/1990
4883912	Process for the recovery of acetic acid In a process for the recovery of acetic acid by extracting acetic acid from an aqueous acetic acid solution containing a metallic salt of sulfuric acid with an organic extractant comprising a tertiary amine and an organic diluent and recovering acetic aci...	11/28/1989
4559110	Acetophenone recovery and purification Distillation of the heavy waste stream from the manufacture of phenol via the cumene process provides an overhead stream containing phenol, acetophenone and 2-phenyl propionaldehyde. Extraction of the overhead stream with aqueous caustic removes the pheno...	12/17/1985
4544453	Stripping of unreacted glycol ethers and acids from an esterification reaction mixture An improved method of stripping unreacted alkylene glycol monoalkyl ethers and unreacted monocarboxylic or halogenated monocarboxylic acids from a mixture containing the monocarboxylic acid ester prepared therefrom by acid catalyzed esterification without...	10/01/1985
4513153	Integrated process for producing tert.butyl alkyl ethers and butene-1 Tert.butyl alkyl ethers are produced from a C4 hydrocarbon feedstock containing isobutene, and the butene-1 is recovered at high purity by extractive distillation of the isobutene-free C4 hydrocarbon stream in the presence of a solve...	04/23/1985
4490153	Process for the production of gasohol Low energy process for the production of gasoline-ethanol blends, comprising dehydrating the aqueous ethanolic product from a conventional fermentation process, preferably containing about 6 wt. % ethanol, so as to generate an aqueous ethanolic effluent c...	12/25/1984
4297172	Low energy process of producing gasoline-ethanol mixtures Gasoline-ethanol mixtures useable as motor fuel are produced by a relatively low energy process comprising interrelated distillation and extraction steps. In the first step, aqueous ethanol, such as an ethanol fermentation beer, is subjected to fractional...	10/27/1981
4239926	Removing water from tertiary butyl alcohol Isobutane is oxidized to provide a debutanized oxidate comprising tertiary butyl alcohol, acetone, water and other byproducts including high boiling products. Water is removed by extractive distillation using a combination of water and xylene as the extra...	12/16/1980
4229263	Recovery of methyl heptafluorobutyrate from methanol by distillation Esters are treated with alkali metal borohydride to produce alcohols. Substantially constant boiling admixtures of: methanol/methyl heptafluorobutyrate, water/1,1-dihydroheptafluorobutanol, and water/methyl heptafluorobutyrate are described....	10/21/1980
4210496	Distillation process for recovery of hexamethyl disiloxane There is disclosed an azeotropic distillation process for separating and recovering hexamethyl disiloxane (HMDO) from toluene in a spent liquor mixture. An HMDO azeotrope former, pyrrolidone, is added to the liquor. The pyrrolidine is added in an amount o...	07/01/1980
4191616	Purification process Alkane dicarboxylic acids of at least 4 carbon atoms particularly the mixture of succinic, glutaric and adipic acids obtained as byproduct in the manufacture of adipic acid are purified by co-distillation with an alkylbenzene having an atmospheric pressur...	03/04/1980
4163696	Distillation process for recovery of methyl isobutyl ketone There is disclosed an azeotropic distillation process for separating toluene from methyl isobutyl ketone (MIBK) in a spent liquor mixture. A toluene azeotrope former, preferably methanol, is added to the liquor in an amount sufficient to form an azeotrope...	08/07/1979
4049723	Method for separation and recovering hydroquinone A method for separating and recovering hydroquinone which comprises distilling a by-product-containing acid-cleavage product, which is obtained by acid-cleavage of an oxidation product of para-diisopropyl benzene in a solvent, in the presence of an aromat...	09/20/1977
3940450	Preparation and recovery of ethers Methyl tertiary butyl ether may be recovered from etherification reaction effluent by azeotropic distillation to recover methanol-ether azeotrope overhead which latter is azeotropically distilled in the presence of n-pentane to give pure ether bottoms sub...	02/24/1976

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Class 203/44 - Of distillate