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7594981 |
Method for concentrating water-soluble organic material
A method for concentrating a water-soluble organic material wherein a mixture of the water-soluble organic material with water is distilled in a distillation column ( 11 ), and the fraction from...
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7479227 |
Liquid-phase separation of low molecular weight organic compounds
A process for separating a component from a low molecular weight organic mixture by pervaporation. The process uses fluorinated membranes and is particularly useful for treating mixtures containing...
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7435318 |
Ionic liquids as selective additives for separation of close-boiling or azeotropic mixtures
The invention relates to a process for separating close-boiling, homo- and heteroazeotropic mixtures by using ionic liquids. Due to the selectivity and unusual combination of properties of the...
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7309403 |
Method for avoiding corrosion
The invention relates to a method of avoiding corrosion in the separation of methylamine from a product stream ( 10 ) which is obtained in the preparation of methylamines by gas-phase reaction of...
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7232505 |
Method of regenerating an aqueous glycol solution containing salts
Method of regenerating a glycol solution containing water, hydrocarbons and salts. The glycol solution is expanded in drum ( 2 ), then distilled in column ( 7 ). The concentrated glycol collected...
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7128814 |
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 by adding of tert-butanol such that the water concentration lowers to less than the limit concentration...
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7125474 |
Process for removing 2-butanol from tert-butanol/water mixtures
The invention relates to a process for separating 2-butanol from an industrial mixture which includes 2-butanol, tert-butanol and water by separating water from the industrial mixture by...
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7097671 |
Method of cleaning industrial gases
A methanol/water scrubbing solution containing colloidal metal sulfides formed from metal carbonyls and resulting from the scrubbing of industrial gases, such as synthesis gas, is subjected to...
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6964729 |
Oxidizing undesired compounds resident within liquid absorbent compounds, reducing atmospheric pollution, regenerating a liquid absorbent and conserving fuel usage associated with reboiler utilization
An improved method and apparatus for oxidizing undesired compounds residing within a liquid glycol based absorbent wherein the compounds are heated within a reboiler chamber to their boiling point...
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6755975 |
Separation process using pervaporation and dephlegmation
A process for treating liquids containing organic compounds and water. The process includes a pervaporation step in conjunction with a dephlegmation step to treat at least a portion of the permeate...
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6733637 |
Process for producing ultra-high purity isopropanol
A process for producing high purity isopropyl alcohol. In one embodiment, the process includes the steps of: (a) feeding a feed stream comprising at least about 99.9 wt. % isopropyl alcohol into a...
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6692616 |
Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation
A process is disclosed for the purification, by distillation, of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal, said process including the following steps: (a)...
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6660169 |
Method and apparatus for reclaiming deicer from produced water of an oil well
A method and an apparatus for reclaiming deicer from produced water of an oil or gas well includes a fractionation tower having a top condenser section, a bottom heat exchanger section and an...
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6632330 |
Process for purification of alkyl alkanoate
A process for the recovery of substantially pure alkyl alkanoate, such as ethyl acetate, from an impure feedstock. The impure feedstock is contacted with a selective hydrogenation catalyst in the...
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6605192 |
Method for producing highly pure monoethylene glycol
A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and...
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6514388 |
Method for producing highly pure monoethylene glycol
A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying...
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6494996 |
Process for removing water from aqueous methanol
A process for separating water from methanol in an aqueous methanol initial mixture, including subjecting said mixture to azeotropic distillation in the presence of sufficient added methyl acrylate...
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6375806 |
Desiccant reconcentration with control of pollutant gases and vapors
Unlike standard atmospheric glycol reconcentration units with reboilers, which release into the atmosphere column overheads containing water vapor, VOCs (volatile organic compounds), H 2 S...
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6299737 |
Recovery of glycols from used glycol-containing technical fluids
A process for recovering glycols from used glycol-containing technical fluids, especially from used antifreeze comprises adding to the used glycol-containing technical fluids an organic solvent...
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6251166 |
Glycol regeneration system having a pressurized reboiler to remove BTEX compounds
A glycol regenerating system wherein a pressurized reboiler is introduced to a typical prior art system, the pressurized reboiler being in the glycol stream upstream from the conventional...
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6093845 |
Ester co-production
This invention relates to a process for the simultaneous co-production of ethyl acetate and n-butyl acetate. The process involves reacting a reaction mixture of ethanol, n-butanol and acetic acid...
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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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5928477 |
Method and apparatus for removing water from an aqueous fluid mixture
A method and apparatus permits concentration of a water-miscible organic liquid in a mixture of such liquid and water, with recovery of a desired concentrate of the water-miscible organic liquid...
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5910234 |
Recovery of alcohols from process wastewater from production of silicone resin
This invention relates to a process for working up the alcohol-containing wastewater which is obtained in the hydrolysis of silanes of the general formula I R 1 a SiCl b (OR 2 ) 4 -a-b ...
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5904321 |
Deicing fluid recovery system especially adapted for aircraft deicing apparatus
A deicing fluid recovery system for aircraft deicing apparatus includes a storage tank from which a deicing fluid/water deicing mixture is pumped through a line heater to a deicing fluid...
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5868906 |
Dehydration and purification of isopropyl alcohol to an ultradry and ultrapure level
A method for the on-site reprocessing of isopropyl alcohol used in semiconductor manufacturing, to generate an ultradry and ultrapure isopropyl alcohol. This ultradry and ultrapure isopropyl...
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5863391 |
Purification of a methanol stream
Acetaldehyde may be effectively removed from a contaminated methanol stream using a distillation method wherein a solvent stream containing a relatively heavy polar compound such as water or...
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5843286 |
Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with water as extractant
A process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane by extractive distillation with water as extractant. The mixture is prepared by reacting methanol...
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5824836 |
Processing system for condensing hydrocarbon emissions from a vapor stream
A system for lowering the ambient temperature of a vapor being produced from a glycol dehydrator unit, as well as a system for reducing the emissions of BTEX is disclosed. Generally, the system...
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5811598 |
Process for the recovery of phenol from an aqueous stream containing NA.sub. SO.sub.4
Phenol dissolved in an aqueous sulphatic stream discharged from a reactor in which cumene hydroperoxide is oxidized to phenol and acetone is recovered by extracting phenol present in said aqueous...
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5800681 |
Separation of ethanol, isopropanol and water mixtures by extractive distillation
Ethanol, isopropanol and water cannot be separated from each other by distillation or rectification because of minimum azeotropes. They are readily separated by extractive distillation. Effective...
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5788745 |
Process and apparatus for vapor recovery
A process for purifying a raw natural gas stream is provided by contacting the gas stream with an absorbant to remove water and hydrocarbon impurities, separating the water and hydrocarbon...
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5756866 |
Process for obtaining separate streams of methanol and ethanol, n-propanol and isobutanol
The process claimed enables three separate streams to be obtained, from mixtures containing methanol, ethanol, n-propanol, isobutanol, water and other both low- and high-boiling compounds, of which...
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5733417 |
Water and organic constituent separator and stripper system and method
A regenerating system, for the removal of water and potentially harmful organic constituents from a dehydration fluid used to dehydrate gas. The system includes apparatus for converting all the...
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5723433 |
Sovent removal process
A method of removing solvents from a paste includes introducing a heated paste into a channel of a dryer under pressure selected so as to avoid flashing of any of the components of the paste. At...
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5670027 |
Method of drying a gas making use of a distillation of a liquid desiccant agent
A method of drying a gas making use of the distillation of a liquid desiccant, the method comprising the introduction of a stream of make-up liquid containing water and of an organic solvent...
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5635590 |
Process and polycondensation apparatus for the treatment of contaminated ethylene glycol
The invention relates to a process for the treatment of contaminated ethylene glycol resulting during a polycondensation process for the production of polyester. In the course of this...
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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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5580426 |
Water and organic constituent separator and stripper system and method
A regenerating system, for the removal of water and potentially harmful organic constituents from a dehydration fluid used to dehydrate natural gas. The system includes a device to assure positive...
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5571387 |
Continuous single vessel distillation and adsorption process
The present invention is a process for separating at least a first component from a second component of at least a first stream within a single vessel having at least one distillation zone and an...
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5552023 |
Recovery of spent deicing fluid
Recovery of ethylene glycol from dilute aqueous solutions is accomplished by passing the solution over the surface of a porous hydrophobic membrane capable of passing water vapor but not liquid...
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5545296 |
Water and organic constituent separator system and method
A regenerating system, for the removal of water and potentially harmful organic constituents from a hydration fluid used to dehydrate natural gas. The system includes a device to assure positive...
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5535877 |
Glycol concentrator
A method and apparatus for removing water from a solution of water and glycol solution. The apparatus finds application in recycling of glycol wherein a water and glycol solution having as much as...
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5501776 |
Process for the regeneration of a desiccant
For the regeneration of a liquid desiccant, a stripping agent is used which is liquid at ambient temperature and pressure, and forms a heteroazeotrope with water, along with the following steps:...
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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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5449440 |
Process for separating alcohols from mixtures of alcohols, water and other compounds
From a mixture containing methanol, ethanol, n-propanol, isobutanol water and other high-boiling and low-boiling compounds, the claimed process enables three separate streams to be obtained, one an...
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5346593 |
Intermediate reboiler for a methanol plant
A methanol refining column and method using an intermediate reboiler. Use of the intermediate reboiler reduces methanol production energy requirements. A side stream at or near a fusel oil takeoff...
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5344528 |
Recovery of phenol from low concentrations with sodium sulfate
Phenol plant waste water containing small amounts of phenol and sodium sulfate is successfully distilled through the addition of recovered sodium sulfate to enhance the volatility of the phenol...
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5269886 |
Glycol stabilizer
In a gas dehydration system utilizing glycol in which a condensate skimming reflux column mounted on a gas fuel burner and heat exchanger unit separates and skims natural gas condensate off glycol...
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5262013 |
Coolant recycling method and apparatus
A coolant recycling apparatus has a boiler and condenser for distilling a glycol and water from a used coolant. The glycol and water are recombined in a mixing tank to form a mixture having a...
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