Class 203/76 - Including the addition of water or steam

Subclass of Class 203 - Distillation: processes, separatory
Definition: Processes directed to adding water or steam to at least
No. of patents: 40
Last issue date: 11/27/2007

Number	Title	Issue Date
7299930	Collecting agent comprising ammoniated compounds (primary, secondary, tertiary amines), for use in the process of grinding and/or floating copper, molybdenum, zinc, and other contained mineral ores The present invention provides a ammoniated collector (amine, azepine, etc.) alone or in combination with other thiol-type collecting reactants, as well as sodium, iron, magnesium, and/or manganese sulfates, sulfurs, oxides, and hydroxides, acrylic acid polymers and...	11/27/2007
7074971	Recovery of ethylene and propylene from a methanol to olefin reaction system The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetyl...	07/11/2006
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
6299734	Preparation of an aqueous solution of free hydroxylamine An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separa...	10/09/2001
6214172	Preparation of methylglyoxal dimethyl acetal In a process for the preparation of methylglyoxal dimethyl acetal from methylglyoxal and methanol in the presence of an acidic ion exchanger, water is introduced in an amount sufficient to form an acidic reaction mixture in which the acetal product and wa...	04/10/2001
6210583	Spent caustic pretreatment and enhanced oxidation process A process for pre-treating a spent caustic stream prior to oxidation which includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic using a solvent to yield a spent caustic raffinate ...	04/03/2001
5885422	Spent caustic (pre)treatment process A process for pretreating a spent caustic stream prior to oxidation includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic using a solvent to yield a spent caustic raffinate contain...	03/23/1999
5866721	Process for separating the product gas mixture from the catalytic synthesis of methyl mercaptan A process for separating the product gas mixture from the catalytic synthesis of methyl mercaptan. Because of improved separation of the product gas mixture into its components, less hydrogen sulfide and methyl mercaptan are lost in discharging the inert ...	02/02/1999
5779861	Method for treating process condensate An apparatus and method for treating chemical production plant process condensate and low pressure purge gas such that a contaminant-rich stream is recoverable from the condensate and purge gas, wherein the contaminants are substantially removed from the ...	07/14/1998
5718810	Methanol recovery using extractive distillation A method for recovering methanol from sulfur-based wood pulping process vapors, which contain at least methanol and dimethyl disulfide. The method involves three steps. The first step consists of introducing the vapors into a first distillation tower at a...	02/17/1998
5643420	Method for treating process condensate An apparatus and method for treating chemical production plant process condensate such that a contaminant-rich stream and a relatively pure aqueous stream is separately recoverable from the condensate, wherein the contaminants are substantially removed fr...	07/01/1997
5626724	Recovery of N-ethylpiperazine by distillation In a process for the recovery of N-ethylpiperazine by distillation from mixtures with N,N'-diethylpiperazine, piperazine, ethanol, water and accompanying substances, water is added in a manner such that, at the location of the addition of the water, the p...	05/06/1997
5587047	Method for separating boric acid A method for separating boric acid from a liquid, especially liquid waste obtained from a nuclear power plant. In the method, the waste solution containing the boric acid is contacted with steam in a reactor so that the boric acid evaporates from the liqu...	12/24/1996
5529667	Process for recovering ethylene oxide In an improved process for recovering ethylene oxide from an aqueous ethylene oxide solution further containing formaldehyde is provided wherein the impure aqueous ethylene oxide solution is introduced into a distillation zone as a feed stream and undergo...	06/25/1996
5468347	Method for separating boric acid The present invention provides a method for separating boric acid from a liquid, especially liquid waste obtained from a nuclear power plant. In the process, the waste solution containing the boric acid is contacted with steam in a reactor so that the bor...	11/21/1995
5385646	Method of treating chemical process effluent An apparatus and method for treating chemical production plant process condensate such that a contaminant-rich stream and a relatively pure aqueous stream is separately recoverable from the condensate, wherein the contaminants are substantially removed fr...	01/31/1995
5348624	Process for separating ethyl tert-butyl ether and ethanol For separating ETBE and ethanol the following principal stages are employed: (1) Extraction of ethanol by water, the raffinate being ETBE saturated in water and the extract an ethanol/water mixture containing a small proportion of ETBE; (2) Concentration ...	09/20/1994
5264117	Distillation of hydrocarbons Where side stream distillate strippers are used in the distillation of hydrocarbons, the required size of the distillation column and the amount of stripping gas or vapor required are reduced by passing components stripped from the distillates through a p...	11/23/1993
5250156	Method of separating ethyl tertiobutyl ether from mixtures with ethanol The separation of ethyl tertiobutyl ether from mixtures with ethanol is based on heteroazeotropic distillation with water as the entrainer using two distillation columns, coupled with an overhead decanter. Purified ethanol is collected from the bottom of ...	10/05/1993
5167773	Distillation tower and sidestream stripper therefor A distillation tower (1) has a plurality of liquid sidestream lines (5, 6, 7) and a multi-stage sidestream stripper (13) which includes a respective stripping section (14, 15, 16) for each sidestream line housed in a common, upright, cylindrical shell (28...	12/01/1992
5131984	High quality phenol rectification with energy recovery The process for rectification of phenol prepared from crude phenol being the product of decomposition of cumene hydroperoxide and having previously been distilled to remove large portions of acetone, cumene and alpha methylstyrene which includes: feeding ...	07/21/1992
5028735	Purification and preparation processes for methyl methacrylate A purification process for methyl methacrylate (MMA) and a recovery process for methanol are disclosed. A mixture, which contains water, methanol and methyl methacrylate (MMA) as principal components along with at least one of methyl acrylate, methyl prop...	07/02/1991
4966657	Process for separating ethylene oxide from aldehyde impurities by distillation An improved process for separating ethylene-oxide from formaldehyde and acetaldehyde in contaminated ethylene oxide, the process involves introducing the contaminated ethylene oxide into a reflux column and distilling the contaminated ethylene oxide under...	10/30/1990
4652343	Process for the separation of mixtures of paraffin or respectively paraffins of 6-14 carbon atoms and alcohol or respectively alcohols of 4-8 The separation of homozeotropic mixtures of a paraffin or paraffins of 6-14 carbon atoms and an alcohol or alcohols of 4-8 carbon atoms is conducted in two rectification steps. In a first step, rectification is carried out in the presence of water as the ...	03/24/1987
4595461	Process for the non-degenerative distillation of fatty acids A process for the nondegenerative distillation of C6 -C24 -fatty acids, of the type obtained by splitting natural fats and oils or by synthetic processes, such as for example the oxidation of paraffins, the crude product is thermally...	06/17/1986
4566947	Method of separating a mixed liquid into light and heavy fractions by distillation A two-stage distillation method for separating a mixed liquid such as a dimethylformamide-containing aqueous liquid or a methanol-containing aqueous liquid, into light and heavy fractions. The mixed liquid is first subjected to a distillation treatment in...	01/28/1986
4522920	Production of ethanol A flow of fermenting liquor from a fermentor is separated into a yeast concentrate flow, which is recirculated to the fermentor, and a yeast-free flow which is separated in a simple evaporator unit into a first ethanol-enriched vapor flow and a first liqu...	06/11/1985
4468257	Washing and removal method of high molecular substances Method of adding water and a hydroxide of an alkali metal or alkaline earth metal to a washing solvent such as an alkylamide and/or alkylsulfoxide when washing and removing high molecular substances stuck on the interior of a production apparatus or moldi...	08/28/1984
4448644	Method of producing ethanol-water azeotrope from crude ethanol This invention relates to a process for purifying crude ethanol, whether produced by fermentation or by the synthetic route, to produce a pure ethanol-water azeotrope. The process uses only two distillation columns for fermentation ethanol or synthetic et...	05/15/1984
4436902	Removal of contaminants in liquid purification A liquid containing a contaminant such as water or polymeric solids is purified. Purification of a liquid containing a contaminant is enhanced by the use of second fractionating column in conjunction with a first fractionating column to recover a portion ...	03/13/1984
4360406	Process for the preparation of tertiary butyl alcohol Provided is a process for preparing tertiary butyl alcohol from isobutylene comprising reacting isobutylene or a hydrocarbon mixture containing isobutylene with an aqueous solution of an aliphatic carboxylic acid having from 1 to 6 carbon atoms in the pre...	11/23/1982
4358536	Production of ethanol A flow of fermenting liquor from a fermentor is separated into a yeast concentrate flow, which is recirculated to the fermentor, and a yeast-free flow which is separated in a simple evaporator unit into a first ethanol-enriched vapor flow and a first liqu...	11/09/1982
4347385	Process for the separation of sulfur compounds from water Sulfur compounds are separated from aqueous mixtures containing same by employing a stripper having at least two stripping sections with at least a portion of the stripper kettle product being recycled to the lower stripping section. The process is partic...	08/31/1982
4309254	Alcohol recovery process A process for the production of alcohol from a fermented feed wherein insoluble organic matter is separated prior to entry into a first distillation column. The insoluble organic matter is dried under pressure to produce dried distillers grain and wherein...	01/05/1982
4308109	Method of producing ethanol-water azeotrope from crude ethanol Process for purifying crude ethanol, whether produced by fermentation or by the synthetic route, to produce a pure ethanol-water azeotrope. The process uses only two distillation columns for fermentation ethanol and only three columns for synthetic ethano...	12/29/1981
4302298	Process for isolating methyl tert-butyl ether from the reaction products of methanol with a C₄ hydrocarbon cut containing isobutene Process for isolating methyl tert-butyl ether contained in the reaction product of methanol with a C4 hydrocarbon cut containing isobutene, comprising fractionating said reaction product by introducing it at an intermediate point of a distillat...	11/24/1981
4269667	Acrylonitrile purification by extractive distillation A method for purifying acrylonitrile resulting in capital and operating cost savings consists of distilling a solution of acrylonitrile and impurities in a distillation column under vacuum, and removing the purified acrylonitrile as a vaporous sidestream ...	05/26/1981
4233281	Recovery of hydrogen fluoride from metallic fluoride salts Anhydrous hydrogen fluoride of high purity can be recovered from metallic fluoride salts containing phosphate values by digesting the metallic salts in an aqueous solution in a humid atmosphere at a sufficiently high temperature to release a gas containin...	11/11/1980
4009230	Device for vacuum treatment of liquids by means of a gaseous strip-medium Oil or fat is deodorized by contacting with steam. The oil or fat is finely distributed in a vacuum contact zone by spray means whereupon it contacts a steam vapor. The contacted oil or fat is then recycled in the same contact zone, finely distributed, an...	02/22/1977
3956074	Recovery of methylglyoxal acetal by plural stage distillation with intermediate phase separation A process for the recovery of methylglyoxal acetal from a reaction mixture which has been obtained in the reaction of acetone with an alcohol and a nitrosation agent or oxidizing agent in the presence of an acid catalyst followed by neutralization which c...	05/11/1976

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Class 203/76 - Including the addition of water or steam