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7619098 |
Method for producing phthalic anhydride that conforms to specifications
Process for the preparation of on-spec phthalic anhydride by the distillative purification of crude phthalic anhydride at reduced pressure, where the crude phthalic anhydride is passed to the...
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7611604 |
Method and device for the production of purified steam
The invention relates to a method and a device for the production of pure steam. A falling-film evaporator is used. Of the water-steam mixture leaving the evaporator unit, part of the water is...
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7594980 |
Device and method for distillation
Device for distillation, for example extraction of fresh water from sea water, including a number of chambers ( 3 ) at least in one row, an inlet ( 10 ) for distillation fluid, an outlet ( 11 ) for...
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7540944 |
Saline/sewage water reclamation system
The present water reclamation system comprises a series of concentric thin shells. The shells mount within a housing that can be maintained under vacuum or low pressure. The shells rotate at high...
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7520917 |
Devices with extended area structures for mass transfer processing of fluids
A microchannel device includes several mass transfer microchannels to receive a fluid media for processing at least one heat transfer microchannel in fluid communication with a heat transfer fluid...
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7431804 |
Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent
A process is proposed for the distillation or reactive distillation of a mixture that includes at least one toxic component, the process being carried out in a column containing a structured...
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7316781 |
Pseudo-distillation method for purifying a dry cleaning solvent
Pseudo-distillation, steady-state method for purifying dry cleaning solvents containing laundry soils and other contaminants.
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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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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...
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6984293 |
Azeotropic distillation of cyclic esters of hydroxy organic acids
Cyclic esters of hydroxy organic acids can be produced and recovered via azeotropic distillation. In certain embodiments cyclic esters, such as glycolide and lactide, can be produced from a...
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6860966 |
Method for isolating polyphenylene ether polymer resins from solution
A method of removing substantially all solvent from a solution containing a polyphenylene ether polymer resin with little by-product formation (less than 250 ppm) is provided. The method employs a...
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6656327 |
Method and device for the production of pure steam
An evaporation product discharged from a lower end a falling-film evaporator enters a downpipe ( 7 ), makes a 180° turn at a bottom of the downpipe, and moves upward through an annular rising...
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6638398 |
Methods for the evaporation of an aqueous solution containing ammonia
A method including evaporating aqueous solutions containing ammonia, adding an acid to the evaporated vapor flow to form an ammonium salt, and condensing the vapor flow to form a liquid containing...
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6635150 |
Method for distilling a fluid with horizontal vapor transfer into a condensation zone and modular device for implementing said method
A method for distilling a fluid which is useful, for instance, in eliminating salt from brackish and/or sea water includes percolating films on plates with multiple effects having several...
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6627047 |
Method for preventing polymerization in thin-film type evaporating device
A method is provided for preventing an easily polymerizable substance from being polymerized in a thin-film type evaporating device by supplying a solution of the substance to the evaporating...
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6623546 |
Method and installation for chemical purification of vapor in a dehydrator with mechanical vapor compression
According to the invention, the vapor is taken from the condensation chamber of the dehydrator and, prior to being compressed and at a temperature substantially equal to 100° C., it is caused to...
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6423187 |
Heat exchanger mechanism using capillary wipers for a thin film distiller
A thin film distiller is provided which applies distilland to an evaporative side by the use of wicks which work by capillary action. The evaporated vapor is transferred to the condensate side...
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6365413 |
Thin film thermal oxidative oil deposit testing device and method
Thin film thermal oxidative engine oil or other oleaginous liquid deposit device has an oleaginous test liquid placement volume; a heatable depositor surface in liquid communication with the...
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6350352 |
Process for separating by distillation pure (meth)acrylic acid from mixtures
A process for distillative separation of pure (meth)acrylic acid from mixtures which include comprise (meth)acrylic acid and dimers and oligomers of (meth)acrylic acid and are essentially free from...
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6340414 |
Process for the recovery of perfluorinated sulphonic acids from spent acid
Process for the recovery of fluorinated sulphonic acid including the step of subjecting the spent acid to heat treatment with stepwise or continuously increasing temperature, withdrawing at least...
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6336997 |
Process for refining heat-deteriorative compound, contained in multi-component liquid mixture, by distillation
A heat-deteriorative compound contained in a liquid mixture is refined by a distillation procedure using a distillation column in which a vapor fraction and a liquid fraction containing the...
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6334935 |
Distillation of (meth) acryloxy-bearing alkoxysilane
A (meth)acryloxy-bearing alkoxysilane is isolated and purified to a high purity by distilling a reaction solution containing the (meth)acryloxy-bearing alkoxysilane in a thin-layer distillation...
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6080273 |
Method and device for treating liquids by partial evaporation
A process and a device for treating a liquid by separating out constituents contained in the liquid. Pollutants are removed or the liquid is sterilized by partial evaporization. The liquid is...
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6066232 |
Method and vaporizer for vaporizing oxidation-sensitive compounds
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5944950 |
Process for the final evaporation of black liquor
The process for the final evaporation has at least two evaporation appliances. These appliances are coupled in series with respect to the black liquor and in parallel with the live steam (primary...
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5904814 |
Removal of water and ammonia from benzophenone imine reactor effluents
A process for removing water and ammonia from benzophenone imine reactor effluents resulting from the catalytic reaction of benzophenones of the formula I ##STR1## where R 1 and R 2 , have the...
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5873981 |
Recovery of anhydrous acids
A is a process for removing water from an alkanesulfonic acid such as methanesulfonic acid or ethanesulfonic acid by mixing an azeotropic excess of a phenolic compound with water and the...
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5868908 |
Separation of inorganic salts from dimethyl sulfoxide
A process for separating inorganic salts from a solution of dimethyl sulfoxide, water and salts including feeding the solution plus a hydrocarbon based oil to a vacuum thin film evaporator. The...
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5795446 |
Method and equipment for heat-of-vaporization transfer
A method and equipment for heat-of-vaporization transfer in a heat exchanger, using steam bubbles. To achieve higher transfers at slight overheating, and with a very simple design, steam bubbles...
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5766412 |
System and method of waster water reduction and product recovery
A system is disclosed for reducing the amount of waste water and recovering reusable constituents from a waste stream comprising at least two constituents having different relative volatilities....
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5710261 |
Process for the separation of alcohols by distillation
Aliphatic alcohols with up to 30 and especially with 6 to 18 carbon atoms are separated from a mixture of alkyl glycosides and alcohols which are unreacted during the production of these...
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5683555 |
Working up reaction mixtures obtained in addition reactions with acetylene or propyne
Reaction mixtures obtained in addition reactions of OH-- or NH-- carrying compounds with acetylene or propyne in the presence of alkali metal alcoholates or alkali metal amides are worked up by...
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5630914 |
Method and apparatus for decontaminating a liquid
A method for decontaminating a liquid of a contaminant having a vapor pressure which is higher than the vapor pressure of the liquid. A contaminated liquid is directed through an inclined conduit....
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5607558 |
Method for selective and/or unselective vaporization and/or decomposition of, particularly, hydrocarbon compounds and apparatus for carrying out such a method
An apparatus and method for separating the components of and/or decomposing a liquid material, involving the application of an artificial gravitational field to a liquid material by rotating the...
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5582692 |
Method for the purification of vitamin E
A method for the separation and purification in a single pass of a heat or oxygen-sensitive liquid feed, such as a plant derived liquid feed mixture of fatty acids, tocopherol compounds and...
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5562808 |
Method and apparatus for decontaminating a liquid surfactant of dioxane
A method and apparatus are disclosed for decontaminating a liquid surfactant of a dioxane having a vapor pressure which is higher than the surfactant. A contaminated liquid surfactant is directed...
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5556516 |
Method for the purification of 1-aminopropanediol-2,3
1-aminopropanediol-2,3 containing 2-aminopropanediol-1,3 of less than 0.30% by weight can be prepared by the present purification process, which involves distilling a 1-aminopropanediol-2,3...
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5534113 |
Forming solutions
A solution of cellulose is formed by moving a premix of a tertiary amine N-oxide, water and cellulose through a thin-film evaporator using a bladed rotor under treatment conditions which specify,...
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5472575 |
Vacuum and infra-red radiation solvent evaporation
A rotary evaporator is described utilizing a magnetically driven fluorocarbon cylinder, operating within a solvent container, to create a thin solvent film for rapid evaporation without the usual...
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5421962 |
Desalination plant for salt water using solar energy
The present invention relates to water treatment using solar energy. The desalination plant includes an evaporator-desalter communicating with an intake system for water to be desalinated and a...
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5419815 |
Process for purifying fatty acid amides
The present invention relates to a process for purifying fatty acid amides, which contains the following process steps: neutralization of the fatty acid by addition of an aqueous alkaline...
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5411640 |
Centrifugal distillation apparatus
The disclosed invention is an apparatus for the distillation of liquids. The apparatus has a plurality of vertically-stacked, parallel disks which are rotated. The liquid to be distilled is...
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5364500 |
Process for removing nitrites from a silver nitrate solution
A silver nitrate feed solution containing nitrites and nitric acid is treated to produce a low-nitrite silver nitrate product solution. In the process, the temperature of the feed solution is...
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5316628 |
Process and device for the simultaneous transfer of material and heat
A process for simultaneously exchanging material and for exchanging heat, material change being effected between a gas phase and at least one liquid phase by contact and passage in opposite...
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5302255 |
Reducing molecular weight distribution of polyether glycols by short-path distillation
Polyether glycols, especially poly(tetramethylene ether) glycol (PTMEG) having a narrow molecular weight distribution of about 1.25 to 1.80, or dispersity of 1.05 to 1.90, are made by a process...
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5271811 |
Process for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum distillation
2-(4-Isobutylphenyl)-propionic acid is purified by subjecting it to a vacuum rectification, in which the temperature is below the decomposition temperature of the acid.
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5259927 |
Apparatus for thickening liquids
An apparatus for thickening liquids with solid contents has a container receiving the liquid and a vapor outlet and a heater, which is positioned in the liquid column in the container. The heater...
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5256250 |
Thin film evaporator
In a thin film evaporator for the evaporation of solutions, colloids, suspensions, or the like, to concentrates, which has a heatable cylindrical evaporator casing coupled with a rotary drive,...
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5246541 |
Evaporator for liquid solutions
A falling film evaporator includes a chamber having a top and bottom tube plate; a plurality of vertical tubes each having an interior and exterior surface and extending through the chamber and...
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5234554 |
Method of separation of fatty alcohols from solutions comprising alkyl polyglycosides and fatty alcohols by distillation
Fatty alcohols are separated from a solution containing alkyl polyglycosides (APGs) and alcohols, wherein the alcohols and the alkyl groups of the APGs contain 10-18 C atoms and wherein the mean...
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