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7592468 |
Production of Δ 9 tetrahydrocannabinol
Δ9 THC acid is obtained from plant material and extracted into an aqueous solvent under conditions of pH control. The acid is converted to a salt and the salt extracted into a polar solvent,...
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7569122 |
Method for purifying nitrogen trifluoride
A highly pure nitrogen trifluoride having a carbon tetrafluoride content of 10 ppm or less can be effectively obtained by boiling crude liquid nitrogen trifluoride having carbon tetrafluoride...
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7563360 |
Mercury-removal process in distillation tower
A top temperature T 1 of a distillation tower 1 is held below a liquefying temperature of a light fraction by returning a part of an exhaust gas W, which is cooled by a condenser 5 , to the...
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7556717 |
Method and device for extractive distillation
A process for fractionating a starting mixture of two or more components by extractive distillation using a selective solvent in a dividing wall column aligned in the longitudinal direction of the...
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7465376 |
Method and device for treating liquids
The invention provides for the removal of impurities from treatment fluid including a base liquid and a variety of impurities contained in the base liquid by conveying the treatment fluid to at...
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7390380 |
Processing of shipboard wastewater
Incoming wastewater is preheated in a heat exchanger before delivery to a flash chamber through an orifice for flashing into water vapor rising into an upper section of the flash chamber which also...
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7384501 |
Method for improved turpentine recovery from modern cooking plants
A method for the preparation of pulp by means of alkaline cooking, in which method spent liquor is transferred to pressurized tanks, and at least one liquor is expanded corresponding to a...
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7211193 |
Processes for the purification of bis(2-hydroxyethyl)terephthalate
A method is disclosed for efficiently obtaining BHET of high purity from an EG (ethylene glycol) solution containing crude BHET (bis(2-hydroxyethyl)terephthalate), especially a decomposition...
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7179388 |
Method for removing formic acid from aqueous solutions
Formic acid is at least partly removed from an aqueous solution comprising formic acid, cyclohexanone and cyclohexanol by decomposition over certain decomposition catalysts. The method is...
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7157003 |
Cyclic method for separating chemical elements present in an aqueous solution
The invention concerns a cyclic method for separating at least one chemical element E 1 from at least one chemical element E 2 from an aqueous solution containing said elements, which employs a...
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7153432 |
Method of purifying Fischer-Tropsch derived water
A process for the production of highly purified water 38 from Fischer-Tropsch reaction water 12 , includes at least the steps of a primary treatment stage comprising an equilibrium staged...
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7141707 |
Process for separating 2-butanol from tert-butanol/water mixtures
The present invention relates to a process for separating 2-butanol from tert-butanol/water mixtures using a membrane to reduce a water concentration to less than the limit concentration of the...
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7132051 |
Liquid-liquid extraction of polar organic substances from their aqueous solutions with fluorinated extracting liquids
A liquid-liquid extraction process of ketones, alcohols, aldehydes, alkyl esters of carboxylic acids, carboxylic acids, ethers, amines and heterocyclic compounds, from their aqueous solutions,...
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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,...
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6932889 |
Water treatment device and method
A point of use water purification unit for continuously and completely purifying water at all point of use for removing all chemicals, killing all microorganisms; the device having a computer...
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6916939 |
Process for the preparation of cyclic esters and method for purification of the same
The present invention provides a process for production of a cyclic ester by depolymerization of an aliphatic polyester. In the process, a mixture containing the aliphatic polyester and a specific...
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6679939 |
Fractional condensation of a product gas mixture containing acrylic acid
In a process for the fractional condensation of an acrylic acid-containing product gas mixture of a gas-phase partial oxidation of C 3 precursors of acrylic acid with molecular oxygen under...
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6583326 |
Process for separating phenol from a mixture comprising at least hydroxyacetone, cumene, water and phenol
Phenol is separated from a mixture containing hydroxyacetone, cumene, water and phenol, by fractionating the mixture in a process with a fractional distillation step and a phase separation step to...
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6559348 |
Process for treating gas flows of polyolefin manufacturing
The invention relates to a process for the treatment of a gas stream obtained from the production of polyolefins and containing unreacted compounds. According to the process, uncondensed compounds...
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6464839 |
Beta-elemene, method to prepare the same and uses thereof
This invention provides an anti-cancer composition of high purity beta-elemene extracted from plant sources. This invention also provides for the use of the composition as well as a low cost method...
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6461481 |
Process for removing water from organoborane compounds
A method of removing water from wet organoborane by dissolving the wet organoborane in an organic solvent in which water is incompletely soluble, decanting any insoluble water, and distilling the...
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6409888 |
Method and apparatus for water degasification and distillation
A method and apparatus for water degasification and distillation in an apparatus having a container for a reservoir of water to be degassed and distilled, a relatively small boiler adjoining the...
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6306307 |
Pervaporation apparatus and method
Pervaporation or vapor permeation apparatus and method having a separator module located in an unpressurized tank. The module has a plurality of stacked, disk-like separator elements mounted on a...
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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...
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6252110 |
Methods for recovering acrylic acid
A method for recovering acrylic acid from high boiling impurities containing acrylic acid dimer, acrylic acid and maleic acid at high efficiency with stability which includes the steps of (1)...
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6146533 |
Method of treating wastewater containing chemical substances by use of supercritical fluid and treating apparatus
There is disclosed a method and an apparatus, of treating wastewater containing chemical substances, which comprises passing, into a continuous phase of water to be treated that has been formed by...
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6113790 |
Process for removing water-soluble organics from waste streams
The invention relates to a 3-step process for removing water-soluble organics from waste streams. The first step involves contacting a waste stream with base, the second step involves contacting...
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6113744 |
Water distillation apparatus
A water distillation apparatus includes a degasification chamber having a top and a bottom. A liquid inlet is positioned adjacent to the bottom. A gas outlet is positioned adjacent to the top. A...
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RE36577 |
Air distillating column with cross-undulating lining
This column, of the type having a cross-undulating lining, includes means for returning liquid to the vicinity of the edges of the lining and liquid and gas distribution means which contribute to...
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5993607 |
Process for the purification of chlorinated aromatic hydrocarbons
In a process for the purification by distillation of chlorinated aromatic hydrocarbons originating from the chlorination of aromatic hydrocarbons in the presence of FeCl 3 , the crude reaction...
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5976324 |
Removal of water from reaction mixtures
A process as been found for the removal of water from reaction mixtures of acids or acid anhydrides or of aqueous alkali metal hydroxide solutions with alcohols using vapor permeation/pervaporation...
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5849160 |
Process of separating pentafluoroethane and process of producing pentafluoroethane using the same
Pentafluoroethane (HFC-125) is more effectively and more simply separated from a reaction mixture in a process of producing HFC-125. A gas mixture containing perchloroethylene (PCE), HFC-125,...
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5738761 |
Sewage treatment process and apparatus
A waste water treatment system includes a preliminary first stage separator for separating an aqueous phase from other materials. A pressure vessel sedimentation follows for removing most of the...
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5681433 |
Membrane dehydration of vaporous feeds by countercurrent condensable sweep
A process for the dehydration of a vaporous mixture. The basic process involves directing a predominantly condensable water vapor-containing vaporous mixture against the feed side of a membrane...
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5665208 |
Method and apparatus for the quantitative enrichment of volatile compounds by capillary distillation
A quantitative enrichment of volatile compounds from substances of the macro- to submicro field in a short time is realized by capillary distillation in a system which includes an evaporator...
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5630913 |
Water distillation system
A water distillation system (10) includes a boiling chamber (11) and a condensation chamber (12). Water is fed via an inlet pipe (13) to a degassing chamber (15) where volatile gases are removed...
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5628901 |
Vessel for treating liquids
A single vessel with no moving parts is constructed to perform the functions of coalescing, vacuum dehydration, and thin film evaporation.
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5609734 |
Combined distillation and permeation process for the separation of oxygenated compounds from hydrocarbons and use thereof in etherification
A process for the separation of oxygenated compounds, containing mainly methanol and possibly a minor amount of water and/or dimethyl ether, from a mixture of hydrocarbons containing 3 to 8 carbon...
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5607557 |
Ethyl tertio-butyl ether purification process combining a membrane method and distillation
A process for separating a mixture containing mainly ethyl tertio-butyl ether (ETBE), ethanol and C 4 hydrocarbons includes introducing the mixture to be separated into a debutanizer from which...
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5585527 |
Continuous distillation and membrane process
A process for separating a first component of a process stream from a second component of a process stream in a single vessel has been developed. The separation process uses an apparatus having a...
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5540818 |
Process for the production of high purity methanesulphonyl fluoride at an improved yield
A process for producing methanesulfonyl fluoride involves reacting methanesulfonyl chloride, a metal fluoride and water to obtain a reaction product, subjecting the reaction product to distillation...
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5523015 |
Azeotropes of hydrogen fluoride with dichloromethane, difluoromethane and chlorofluoromethane
Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride, dichloromethane, chlorofluoromethane and/or difluoromethane by distilling the mixture so that two-component azeotropic...
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5507919 |
Apparatus for the thermal and catalytic defluorination of alkylate
An apparatus and method are provided for the defluorination of a liquid hydrocarbon mixture, containing organic fluorides, produced during the conversion of hydrocarbons using a fluorine-containing...
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5498319 |
Process for purifying diaryl carbonates
Illustrated by the purification of diphenyl carbonate (DPC), diaryl carbonates are purified and freed of contaminants such as inorganic and organic chlorides, metal ions, iron components and color...
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5494556 |
Method of and an apparatus for separating a liquid mixture
A method of separating a liquid mixture wherein the liquid mixture is heated; the heated liquid mixture is supplied to a pervaporation membrane module to separate a permeable component of the...
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5454878 |
Method for removing hydrocarbon contaminants from solid materials
A system for removing hydrocarbons from solid materials. Contaminated solids are combined with a solvent (preferably terpene based) to produce a mixture. The mixture is washed with water to...
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5445731 |
Pervaporation vessel
Apparatus for breaking or separating a liquid mixture or emulsion having two or more components. The apparatus includes a closed vessel having one or more sequentially connected filtering...
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5441606 |
Liquid purifying and vacuum distillation process
This invention involves a distillation process for operating a distillation purifying system. The system includes a section which creates a vacuum pressure that is transmitted throughout the...
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5385647 |
Process for the reduction of the alcohol content of alcoholic beverages
A process for reducing the alcohol content of alcohol-containing beverages, in particular of beer or wine, wherein the alcohol is partially or completely removed by way of pervaporation.
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5316625 |
Apparatus for separating a partially miscible solvent from water
An apparatus for separating a partially miscible solvent from a contaminated water stream. The apparatus includes a fully enclosed containment vessel having an internal volume bounded by a...
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