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Azeotrope

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


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Process for the separation of clycols
Shell Oil Company
March 22, 2018 - N°20180079702

The invention provides a process for the separation of meg and 1,2-bdo from a first mixture comprising meg and 1,2-bdo in a weight ratio of at least 10:1 (meg:1,2- bdo), said process comprising the steps of; (i) providing the first mixture as a feed to a distillation column at a point in the range of from 20 to 80% of the column ...
Method for preparing 3-trifluoromethyl chalcones
E.i. Du Pont De Nemours And Company
March 01, 2018 - N°20180057468

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 ...
Azeotropic or azeotrope-like compositions of 3,3,3-trifluoropropyne and water
Honeywell International Inc.
March 01, 2018 - N°20180057434

Azeotropic or azeotrope-like compositions of 3,3,3-trifluoropropyne and water, such as from about 1 to about 50 wt. % water and from about 50 to about 99 wt. % 3,3,3-trifluoropropyne, based on the combined weight of the water and 3,3,3-trifluoropropyne, and methods of producing essentially water free 3,3,3-trifluoropropyne.
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Azeotropic or azeotrope-like compositions of 1,3-dichloro-3,3-difluoroprop-1-ene (hcfo-1232zd) and hydrogen fluoride (hf)
Honeywell International Inc.
March 01, 2018 - N°20180057430

Azeotropic or azeotrope-like mixtures of 1,3-dichloro-3,3-difluoroprop-1-ene (hcfo-1232zd) and hydrogen fluoride (hf). Such compositions are useful as a feed stock or intermediate in the production of 1,1,1,3,3-pentafluoropropane (hfc-245fa), 1-chloro-3,3,3-trifluoropropene (hcfo-1233zd), and 1,3,3,3-tetrafluoropropene (hfo-1234ze).
A method for recovering polymer from printed petg substrates
Nicrometal S.a.
March 01, 2018 - N°20180056696

A method for recovering polymer from printed glycol-modified poly(ethylene tefephtalate) (petg) substrates, comprising the steps of: providing a printed petg substrate with the print layer comprising pigments and/or dyes dispersed in a binder matrix; chopping the substrate into irregular strips and; treating the chopped substrate with a treating composition; wherein the treating composition is an aqueous azeotrope of ...
Separation of (z)-1-chloro-3,3,3-trifluoropropene (hcfo-1233zd(z)) and 1-chloro-1,3,3,3-tetrafluoropropane (hcfc-244fa) by ...
Honeywell International Inc.
March 01, 2018 - N°20180056210

A method for separating halocarbons and, in particular, a method for separating (z)-1-chloro-3,3,3-trifluoropropene (hcfo-1233zd(z), or simply 1233zd(z)) and 1-chloro-1,3,3,3-tetrafluoropropane (hcfc-244fa, or simply 244fa) via distillation by adding a third component, hydrogen fluoride (hf), forming a binary azeotrope of 1233zd(z) and hf. The binary 1233zd(z)/hf azeotrope may then be recovered ...
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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 ...
Process for the separation of glycols
Shell Oil Company
December 21, 2017 - N°20170362150

The invention provides a process for the separation of meg from a glycol stream comprising meg and 1,2-bdo, said process comprising the steps of: (a) providing the glycol stream and an azeotrope-forming agent to a distillation column, (b) subjecting the glycol stream and the azeotrope-forming agent to distillation at a distillation temperature and a distillation pressure; (c) obtaining a first ...
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 ...
Polyarylethersulfone copolymers
November 09, 2017 - N°20170321031

Where the reaction mixture (rg) does not comprise any substance which forms an azeotrope with water.
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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 ...
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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