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Azeotrope

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


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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 The nonflammable solvent composition includes a fluorocyclopentane in which 3 to 9 hydrogen atoms have each been replaced by a fluorine atom; trans-1,2-dichloroethylene (t-dce); and at least one organic compound, such as a c2-c6 alcohol, a c1-c6 ...
Method for producing diesters of terephthalic acid
Basf Se
October 05, 2017 - N°20170283363

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 to obtain a reaction suspension, a ...
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 ...
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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. ...
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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...
Process for the separation of monoethylene glycol and 1,2-butanediol
Shell Oil Company
June 22, 2017 - N°20170174596

The invention provides a process for separating monoethylene glycol from a mixture comprising monoethylene glycol and 1,2-butanediol, said process comprising the steps of: a. Providing a first stream comprising monoethylene glycol and 1,2-butanediol to a first distillation zone operated at a first pressure and under conditions to remove a first bottoms stream comprising 1,2-butanediol and to remove a first azeotrope ...
Histological specimen treatment
Shell Oil Company
June 08, 2017 - N°20170160173

A single dissolving compound forms plural azeotropes, which can be azeotropically vaporized off at various stages of the treatment process, thus maintaining predictable concentrations of the chemicals present. The treatment process can be performed in the absence of formalin or related compounds which can interfere with the preservation of genetic material. A process for preserving a specimen includes using a ...
Histological specimen treatment
Shell Oil Company
June 08, 2017 - N°20170160172

A single dissolving compound forms plural azeotropes, which can be azeotropically vaporized off at various stages of the treatment process, thus maintaining predictable concentrations of the chemicals present. The treatment process can be performed in the absence of formalin or related compounds which can interfere with the preservation of genetic material. A process for preserving a specimen includes using a ...
Compositions of chloro-trifluoropropene and hexafluorobutene
Shell Oil Company
May 25, 2017 - N°20170145275

Provided are compositions, preferably azeotrope or azeotrope-like compositions including 1,1,1,4,4,4-hexafluoro-2-butene and chlorotrifluoropropene, particularly 1-chloro-3,3,3-trifluoropropene (hcfo-1233zd), and uses thereof of the compositions. The composition may be a heat transfer composition. The composition may be a blowing agent composition. The composition may be a solvent composition. The composition may be a sprayable composition.
Azeotrope-like compositions of tetrafluoropropene and hydrofluorocarbons
Honeywell International Inc.
March 23, 2017 - N°20170081576

Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
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Azeotrope-like compositions of cis-1,1,1,4,4,4-hexafluoro-2-butene
The Chemours Company Fc, Llc
March 09, 2017 - N°20170066953

And another material selected from the group consisting of water, fluoroketones, alcohols, hydrochlorofluoroolefins, and combinations of two or more thereof. These compositions may be used in a wide variety of applications such as, blowing agents, refrigerants, heating agents, power cycle agents, cleaning agents, aerosol propellants, sterilization agents, lubricants, flavor and fragrance extractants, flammability reducing agents, and flame suppression agents.
Azeotrope-like compositions of 1,1,1,2-tetrafluoropropene and 1,1,1,2-tetrafluoroethane
Honeywell International Inc.
March 09, 2017 - N°20170065953

Provided are azeotrope-like compositions consisting essentially of 1,1,1,2-tetrafluoropropene and 1,1,1,2-tetrafluoroethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
Methods of manufacture of salts of hydroxy-substituted aromatic compounds and polyetherimides
Sabic Global Technologies B.v.
February 02, 2017 - N°20170029569

A method for the manufacture of a metal salt of a hydroxy-substituted aromatic compound comprises: contacting a hydroxy-substituted aromatic compound with a base comprising a metal cation in molten diphenyl sulfone or sulfolane to provide a mixture comprising water, diphenyl sulfone or sulfolane, and a metal salt of the hydroxy-substituted aromatic compound; and removing water from the mixture in the ...
Flash spinning process
E I Du Pont De Nemours And Company
December 15, 2016 - N°20160362816

A process for the preparation of plexifilamentary film-fibril strands of polymer. The process includes the steps of generating a spin fluid containing (a) 5 to 30 wt. % containing one or more polymer types, (b) a primary spin agent selected from the group consisting of dichloromethane, cis-1,2-dichloroethylene and trans-1,2-dichloroethylene, and (c) a co-spin agent comprising 1h,6h-perfluorohexane or 1h-perfluorohexane or 1h-perfluoroheptane. ...
Histological specimen treatment
E I Du Pont De Nemours And Company
November 10, 2016 - N°20160327457

A single dissolving compound forms plural azeotropes, which can be azeotropically vaporized off at various stages of the treatment process, thus maintaining predictable concentrations of the chemicals present. The treatment process can be performed in the absence of formalin or related compounds which can interfere with the preservation of genetic material. A process for preserving a specimen includes using a ...
Refrigerant compositions
E I Du Pont De Nemours And Company
October 27, 2016 - N°20160312095

Refrigerant compositions are described. In particular, refrigerant compositions are described that include a two component blend, where one of the components is a refrigerant blend that, when first combined, is considered an azeotropic blend, azeotrope, near azeotropic, or the like. This component is one component of the two components of the resulting refrigerant composition, which is combined with a second ...
Method for preparing 3-trifluoromethyl chalcones
E.i. Du Pont De Nemours And Company
October 20, 2016 - N°20160304474

Disclosed is a method for preparing a compound of formula 1 wherein q and z are as defined in the disclosure comprising distilling water from a mixture comprising a compound of formula 2, a compound of formula 3, a base comprising at least one compound selected from the group consisting of alkaline earth metal hydroxides of formula 4 wherein m is ca, sr or ...
Compositions comprising tetrafluoropropene and tetrafluoroethane; their use in power cycles; and power cycle apparatus
The Chemours Company Fc, Llc
October 06, 2016 - N°20160290175

A method for converting heat from a heat source to mechanical energy is provided. The method comprises heating a working fluid e-1,3,3,3-tetrafluoropropene and at least one compound selected from 1,1,1,2-tetrafluoroethane and 1,1,2,2-tetrafluoroethane using heat supplied from the heat source; and expanding the heated working fluid to lower the pressure of the working fluid and generate mechanical energy as the ...
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