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Azeotrope

Azeotrope-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Separation systems and methods of using them
February 15, 2018 - N°20180043279

Certain embodiments described herein are directed to separation systems and methods effective to separate two or more solvents in a solvent mixture. In certain examples, a system effective to separate two or more azeotrope forming solvents is provided. In some embodiments, the system can be effective to remove at least about 95% of one of the solvents from the solvent mixture.
Azeotropic and azeotrope-like compositions of z-1-chloro-3,3,3-trifluoropropene
The Chemours Company Fc, Llc
February 15, 2018 - N°20180043199

This application provides azeotropic and near-azeotropic compositions of z-1233zd and a second component selected from the group consisting of z-1336mzz, isopentane, e-1438ezy, e-1233zd and hbfo-1233xfb. The inventive compositions are useful as aerosol propellants, refrigerants, cleaning agents, expansion agents for thermoplastic and thermoset foams, solvents, heat transfer media, gaseous dielectrics, fire extinguishing and suppression agents, power ...
Method for preparation of 5-alkylsalicylaldoximes and application thereof
Politechnika Warszawska
December 21, 2017 - N°20170362168

Method for preparation of 5-alkylsalicylaldoximes with formula 1, where r is a c6-c16 alkyl group, consisting in that into a water-alcohol solvent system, p-alkylphenol, sodium hydroxide, chloroform and hydroxylamine are introduced, while in relation to the alkylphenol used, sodium hydroxide and chloroform are used in amounts from the stoichiometric amount to a 100% excess, and hydroxylamine is used in amounts from ...
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Azeotrope-like compositions comprising trans-1-chloro-3,3,3-trifluoropropene
Honeywell International Inc.
November 23, 2017 - N°20170335081

An azeotrope-like mixture consisting essentially of chlorotrifluoropropene and at least one component selected from the group consisting of pentane, hexane, methanol, and trans-1,2-dichloroethene.
Separation process
Rohm And Haas Company
November 23, 2017 - N°20170334829

The azeotrope, or near azeotrope, of methanol and mma is separated via extractive distillation using an extractive distillation solvent comprising cyclohexanone.
Azeotropic composition having fluorine-containing olefin as constituent
Central Glass Company, Limited
November 09, 2017 - N°20170321167

A liquid composition according to one embodiment of the present invention contains 0. 0001 mol % to 40 mol % (z)-1,2-dichloro-3,3,3-trifluoropropene (1223z) and 99. 9999 mol % to 60 mol % (e)-1,2-dichloro-ethylene (t-dce). The liquid composition has less influence on the global environment and azeotropic (or azeotrope-like) properties. There occurs practically no composition change even when the liquid composition is used in an open system ...
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Composition and use of vinylidene fluoride and blends thereof
November 02, 2017 - N°20170313923

The present technology relates to compositional blends that can be used as refrigerants, and more specifically to blends of vinylidene fluoride and at least one other component for use in very low temperature applications. In at least some examples, the second component can be selected from the group consisting of carbon dioxide and pentafluoroethane. Further, the compositions can be azeotropic ...
Integrated process to produce 2,3,3,3-tetrafluoropropene
November 02, 2017 - N°20170313639

The invention relates to a separation process whereby 2-chloro-3,3,3-trifluoropropene (1233xf) is separated from a mixture containing other fluorinated organics and high boiling materials such as dimers using azeotropes of hf formed by adding appropriate amounts to the mixture which facilitate separation by, e. G. Distillation.
Process for manufacturing medium and high molecular weight polyesters
Valspar Sourcing, Inc.
October 26, 2017 - N°20170306086

Medium and high molecular weight polyester polymers are prepared in syrup form from an ester oligomer. The oligomer is converted to the polymer by polycondensation at elevated pressure and elevated temperature in a nonreactive carrier capable of forming an azeotrope with water. The ester oligomerization or polycondensation reactions desirably are monitored using a non-viscometric technique. The process has a rapid ...
Method for producing diesters of terephthalic acid with enrichment of recirculated alcohol
October 19, 2017 - N°20170297998

The present invention relates to a process for preparing a terephthalic diester by reacting terephthalic acid with at least one alcohol, wherein terephthalic acid is suspended in the alcohol in a dispersing tank, the preliminary suspension is passed from the dispersing tank into a reactor and converted in the presence of an esterification catalyst, and water of reaction is distilled ...
Method for producing diesters of terephthalic acid with a dehydration of recirculated alcohol
October 19, 2017 - N°20170297997

The present invention relates to a process for preparing a terephthalic diester by reacting terephthalic acid with at least one alcohol, wherein terephthalic acid is suspended in the alcohol in a dispersing tank, the preliminary suspension is passed from the dispersing tank into a reactor and converted in the presence of an esterification catalyst, and water of reaction is distilled ...
Method for producing diesters of terephthalic acid with circulation of the reaction mixture
October 19, 2017 - N°20170297996

The present invention relates to a process for preparing a terephthalic diester by reacting terephthalic acid with at least one alcohol, wherein terephthalic acid is suspended in the alcohol in a dispersing tank, the preliminary suspension is passed from the dispersing tank into a reactor and converted in the presence of an esterification catalyst, a reaction suspension is drawn off ...
Method for cleaning articles using nonflammable, azeotropic or azeotrope-like composition
October 05, 2017 - N°20170283959

A nonflammable solvent composition, a method of cleaning an article, and a method of depositing a material on a substrate are disclosed. The nonflammable solvent composition includes a fluorocyclopentane in which 3 to 9 hydrogen atoms have each been replaced by a fluorine atom; trans-1,2-dichloroethylene (t-dce); and at least one organic compound, such as a c2-c6 alcohol, a c1-c6 ...
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Improved method for producing alkyl (meth)acrylates
Arkema France
September 21, 2017 - N°20170267624

The present invention relates to a method for producing a c4-c10 alkyl (meth)acrylate, by direct esterification of (meth)acrylic acid by the corresponding alcohol, the reaction water being removed in the form of an azeotrope with the esterification alcohol from a distillation column mounted over the esterification reactor comprising a cationic resin as a catalyst. Said method is ...
Method for producing anhydrous sugar alcohol using azeotropic distillation
Sk Innovation Co., Ltd.
September 07, 2017 - N°20170252669

The present invention relates to a method for producing anhydrosugar alcohol, and more particularly to a method of producing anhydrosugar alcohol using a solvent including at least two components that form an azeotrope with water at atmospheric pressure and that have significantly different boiling points. The method for producing anhydrosugar alcohol according to the present invention can increase the yield ...
Breaking a methanol/methyl methacrylate azeotrope using pressure swing distillation
Rohm And Haas Company
August 31, 2017 - N°20170247313

A methanol/mma azeotrope is broken or avoided by a method comprising the steps of (1) raising the pressure within a first vessel, e. G., a distillation column, that contains a methanol/mma azeotrope, (2) collecting the azeotrope as a liquid, and then in a second, separate vessel, e. G., another distillation column, (3) raising the pressure sufficiently to allow for the breaking ...
Distillation device
Lg Chem, Ltd.
August 10, 2017 - N°20170225100

The present application relates to a distillation device, and according to the distillation device of the present application, in first and second compounds being capable of forming an azeotrope, by introducing the second compound having a relatively high boiling point into a supply port located below the first compound having a relatively low boiling point, the first compound can be ...
Method for one-step synthesis, cross-linking and drying of aerogels
Virginia Commonwealth University
August 03, 2017 - N°20170218160

A method of synthesizing aerogels and cross-linked aerogels in a single step and in a single pot without requiring any solvent exchange is described. Porous matrices are synthesized through a modification of hydrolysis condensation of alkoxides in which addition of water is minimized. The reaction occurs in an ethanol-water azeotrope mixture; the water in the azeotrope slowly hydrolyzes the alkoxide. ...
Azeotropic and azeotrope-like compositions of hfo-e-1,3,4,4,4-pentafluoro-3-trifluoromethyl-1-butene and uses thereof
The Chemours Company Fc, Llc
July 20, 2017 - N°20170203137

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of hfo-e-1,3,4,4,4-pentafluoro-3-trifluoromethyl-1-butene with a second compound selected from the group consisting of methyl formate and hfo-e-1,1,1,4,4,4-hexafluoro-2-butene. Also disclosed are processes of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents; of producing refrigeration by using ...
Azeotrope-like composition of 2-chlor0-3,3,3-trifluoropropene (hcfc-1233xf) and hydrogen fluoride (hf)
Honeywell International Inc.
June 29, 2017 - N°20170183278

Provided are azeotropic and azeotrope-like compositions of 2-chloro-3,3,3-trifluoropropene (hcfo-1233xf) and hydrogen fluoride (hf). Such azeotropic and azeotrope-like compositions are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (hfo-1234yf).
Azeotrope to azeotrope-like composition containing 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane
Daikin Industries, Ltd.
June 22, 2017 - N°20170174965

The problem to be solved by the present invention is to provide a novel mixed refrigerant that can be an alternative for hcfc-123, has a low odp and a low gwp, has a cop equal to that of hcfc-123, and has a refrigerating capacity and gas density higher than those of single refrigerants, such as hcfo-1233zd(e) and hfc-245...
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