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|| List of recent Azeotrope-related patents
|Materials and methods for the base-assisted synthesis of substituted heteroaromatic compounds|
Disclosed herein are some methods for synthesizing the base-assisted coupling of aromatic alcohols with substituted aromatic compounds including some substituted heteroaromatic compounds such as pyrimidines or pyridines to form esters. The reactions may include inexpensive bases such as potassium hydroxide and take place in a solvent mixture comprised primarily of hindered tertiary alcohols that are at least partially immiscible with water.
|Azeotrope-like compositions comprising 1-chloro-3,3,3-trifluoropropene|
An azeotrope-like mixture consisting essentially of chlorotrifluoropropene and at least one component selected from the group consisting of a c1-c3 alcohol, a c5-c6 hydrocarbon, a halogenated hydrocarbon, methylal, methyl acetone, water, nitromethane, and combinations thereof.. .
|Method for preparing 3-trifluoromethyl chalcones|
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 ba, alkali metal carbonates of formula 4a wherein m1 is li, na or k, 1,5-diazabicyclo[4.3.0]non-5-ene and 1,8-diazabicyclo[5.4.0]undec-7-ene, and an aprotic solvent capable of forming a low-boiling azeotrope with water. Also disclosed is a method for preparing a compound of formula 2 comprising (1) forming a reaction mixture comprising a grignard reagent derived from contacting a compound of formula 5 wherein x is cl, br or i with magnesium metal or an alkylmagnesium halide in the presence of an ethereal solvent, and then (2) contacting the reaction mixture with a compound of formula 6 wherein y is or11 or nr12 r13, and r11, r12 and r13 are as defined in the disclosure.
Refrigerants for use in a thermodynamic cycle taking place in a system producing either hot or cold are disclosed. The refrigerants comprise binary azeotrope mixture of saturated hydrocarbon with either methanol or ethanol.
|Azeotropes of isobutylene with fluoro-olefins|
Azeotropic or azeotrope-like compositions of the present invention include trans-1,3,3,3-tetrafluoroprop-1-ene and isobutylene. The azeotropic or azeotrope-like compositions can be used in polymerization processes, including slurry polymerization processes..
|System and method for continuously producing polyoxymethylene dialkyl ethers|
A reaction system and method for producing polyoxymethylene dialkyl ethers (ro(ch2o)nr, n=1-8) by continuous acetalation of formaldehyde and aliphatic alcohol in the presence of an acid ionic liquid catalyst. The reaction system includes an acetalation reaction unit, a product separation unit, and a catalyst regeneration unit.
|Azeotrope-like compositions of tetrafluoropropene and hydrofluorocarbons|
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.. .
|Compositions of chloro-trifluoropropene and hexafluorobutene|
Provided are compositions, preferably azeotrope or azeotrope-like compositions comprised of 1,1,1,4,4,4-hexafluoro-2-butene and chlorotrifluoropropene, particularly 1-chloro-3,3,3-trifluoropropene (hcfo-1233zd), and uses thereof.. .
|Azeotrope-like compositions of pentafluoroethane and trifluoroiodomethane|
Provided are azeotrope-like compositions comprising heptafluoropropane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agents, fire suppressant compositions, and aerosol propellants.. .
|Azeotrope-like composition of 2-chloro-3,3,3-trifluoropropene (hcfc-1233xf) and hydrogen fluoride (hf)|
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)..
|Process for separating hydrogen fluoride from organic feedstocks|
Provided is a process for purifying an organic feedstock comprising (a) distilling a raw organic feedstock comprising hydrogen fluoride, 2-chloro-1,1,1,2-tetrafluoropropane, and 2-chloro-3,3,3-trifluoropropene to produce a first distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a first bottoms stream rich in hydrogen fluoride; (b) cooling said first distillate stream to produce an intermediate composition comprising an organic layer rich in 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, and an acid layer rich in hydrogen fluoride; and, optionally but preferably, (c) distilling said organic layer to produce a second distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a second bottoms stream comprising a purified organic feedstock substantially free of hydrogen fluoride.. .
|Producing heating using working fluids comprising z-1,1,1,4,4,4-hexafluoro-2-butene|
Disclosed herein is a method for producing heating in a high temperature heat pump comprising condensing a vapor working fluid comprising z-1,1,1,4,4,4-hexafluoro-2-butene, in a condenser, thereby producing a liquid working fluid. Also disclosed herein is a method of raising the maximum feasible condenser operating temperature in a high temperature heat pump apparatus comprising charging the high temperature heat pump with a working fluid comprising z-1,1,1,4,4,4-hexafluoro-2-butene.
|Azeotropic and azeotrope-like compositions involving certain haloolefins and uses thereof|
Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of (a) a compound of the formula cf3cx═chra where x is h or f and ra is cf3cf2, cf3 or cl, provided that (i) when x is f, ra is cl, (ii) when ra is cf3cf2 or cl, the compound of formula cf3cx═chra is the e configurational isomer, and (iii) when ra is cf3, the compound of formula cf3cx═chra is the z configurational isomer; and (b) a compound of the formula cf3rb where rb is chfch2f or ch═chcf3, provided that when rb is ch═chcf3, x is f and the compound of formula cf3rb is the z configurational isomer.
|Process for separating ethylene glycol and 1, 2-butanediol|
The present invention relates to a process for separating ethylene glycol and 1,2-butanediol. A material flow containing ethylene glycol and 1,2-butanediol gets into the lower-middle part of the azeotropic rectification column c3 after the light components are removed by the separating columns c1 and c2, wherein the ethylene glycol and the azeotropic agent added from the top of the column form azeotrope which is distilled out from the top of the column and gets into the phase separator d1 after being condensed, the upper phase enriched with azeotropic agent after the phase was separated returns to the top of the column to continue to participate in azeotropy, and the lower phase enriched with ethylene glycol gets into the fourth separating column c4 to be refined to obtain the ethylene glycol product..
|Azeotropic compositions comprising methyl perfluoropentene ethers for cleaning applications|
The present disclosure provides azeotropic and azeotrope-like compositions comprised of methylperfluoropentene ethers and at least one of methanol, ethanol, 2-propanol, hexane, heptane, trans-1,2-dichloroethylene, ethyl formate, methyl formate, hfe-7100, hfe-7200 and 1-bromopropane or combinations thereof. The present disclosure also provides for methods of use for the azeotropic and azeotrope-like compositions..
|Azeotropic compositions of 1,1,3,3-tetrachloro-1-fluoropropane and hydrogen fluoride|
Provided are azeotropic or azeotrope-like mixtures of 1,1,3,3-tetrachloro-1-fluoropropane (hcfc-241fa) and hydrogen fluoride. Such compositions are useful as an intermediate in the production of hfc-245fa and hcfo-1233zd..
|Azeotropic compositions of 1,1,1,3,3-pentachloropropane and hydrogen fluoride|
Provided are azeotropic or azeotrope-like mixtures of 1,1,1,3,3-pentachloro-propane (240fa) and hydrogen fluoride. Such compositions are useful as an intermediate in the production of hfc-245fa and hcfo-1233zd..
|Azeotrope-like composition of hexafluoropropane, hexafluoropropene and hydrogen fluoride|
The present invention relates to an azeotropic or azeotrope-like mixture consisting essentially of 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene and hydrogen fluoride.. .
|Hydrophobic self-etch dental adhesive compositions|
A hydrophobic self-etch dental adhesive composition including a hydrophobic, surfactant-type acidic monomer. The composition may further include hydrophilic and hydrophobic monomers, preferably in a ratio of less than 1:1, and may include a solvent that is an azeotrope..
|Apparatus and method for measuring concentration of liquid-state refrigerant of nonazeotrope refrigerant mixture, and absorption type, 1-stage compressing-absorbing type and 2-stage compressing-absorbing type heat pump including the apparatus|
An apparatus and method for measuring concentration of a liquid-state refrigerant of a nonazeotrope refrigerant mixture. A container is disposed in such a way that a liquid-state refrigerant mixture of the nonazeotrope refrigerant mixture in a saturated state is temporarily stored with set quality.
|Azeotropes of methyl chloride with fluorocarbons|
Azeotropic or azeotrope-like compositions of the present technology include methyl chloride and at least one hydrofluorocarbon or hydrofluoro-olefin. In some examples, the at least one hydrofluorocarbon or hydrofluoro-olefin can be selected from the group consisting of 1,1,1,2-tetrafluoroethane and 1,3,3,3-tetrafluoropropene.
|Compositions and use of vinylidene fluoride and blends thereof|
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.
|Animal feed processing agents, animal feeds and methods of processing animal feed|
Animal feed processing agents containing an azeotrope comprising water, an alcohol, and sodium stabilized by surrounding organized water. Methods of processing animal feed utilizing steam flaking in the presence of added agent comprising an alcohol, and sodium stabilized by surrounding organized water.
|Process for obtaining a dialkyl carbonate and an alkylene glycol|
(b) separating the stream (5) comprising dialkyl carbonate and alkylene glycol as a heteroazeotrope into a first crude product stream (27) comprising essentially di-alkyl carbonate and a second crude product stream (29) comprising essentially alkylene glycol in an apparatus for phase separation (25).. .
|Azeotrope-like compositions of (z)-1-chloro-3,3,3-trifluoropropene and hydrogen fluoride|
Disclosed are azeotropic and azeotrope-like mixtures of (z)-1-chloro-3,3,3-trifluoropropene (1233zd(z)) and hydrogen fluoride. Such compositions are useful as an intermediate in the production of 1233zd(z).
|Methods for producing ethyl tert-butyl ether|
Embodiments of methods for producing ethyl tert-butyl ether (etbe) are provided herein. A method for producing etbe comprises the steps of contacting a c4 olefin-rich stream that contains isobutene with a first catalyst in the presence of ethanol at etherification conditions effective to form a reaction effluent comprising etbe and residual ethanol.
|Azeotropic and azeotrope-like compositions of z-1,1,1,4,4,4-hexafluoro-2-butene, trans-1,2-dichloroethylene, and 1,1,1,3,3-pentafluorobutane|
Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of z-1,1,1,4,4,4-hexafluoro-2-butene, trans-1,2-dichloroethylene and 1,1,1,3,3-pentafluorobutane.
|Isolation of acrylic acid by means of a distillation column having a side offtake|
The present process separates acrylic acid from a composition containing acrylic acid and at least one accompanying product. The process first involves contacting the composition with an aqueous liquid stream to give a liquid solution of acrylic acid, accompanying product, and water.
|Azeotrope-like compositions including cis-1-chloro-3,3,3-trifluoropropene|
The present invention relates, in part, to azeotrope and azeotrope-like mixtures consisting essentially of consisting essentially of cis-1-chloro-3,3,3-trifluoropropene and a second component selected from the group water, hexane, hfc-365mfc, and perfluoro(2-methyl-3-pentanone).. .
|Process for producing ethanol using a crude vinyl acetate feed|
Converting a crude vinyl acetate feed to ethanol by hydrogenating the acetic acid and ethyl acetate in the crude vinyl acetate feed. The crude vinyl acetate feed may comprise acetic acid and/or ethyl acetate, as well as vinyl acetate and minor amounts of vinyl propionate.
|Process for preparing eddn and edmn|
A process for preparing eddn and/or edmn by conversion of fa, hcn and eda, the reaction being effected in the presence of water, and, after the conversion, water being depleted from the reaction mixture in a distillation column, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and eddn and/or edmn at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water.. .
|Azeotrope-like compositions of cis-1,3,3,3-tetrafluoropropene and 1,1,1,3,3-pentafluoropropane|
The present invention provides azeotrope-like compositions of cis-1,3,3,3-tetrafluoroprone (hfo-1234ze (z)) with 1,1,1,3,3-pentafluoropropane (hfc-245fa) and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.. .
|Process for working up reaction outputs from the hydrogenation of eddn or edmn|
A process is disclosed for separating the output from the reaction of eddn or edmn with hydrogen in the presence of thf, a catalyst, teta or deta, water, and optionally organic compounds having higher and lower boiling points than teta or deta. Hydrogen is removed, and the output is supplied to a distillation column dk1 in which an azeotrope, optionally comprising organic compounds with a boiling point lower than teta or deta, is removed from the top.
|Azeotrope-like compositions comprising 1-chloro-3,3,3-trifluoropropene|
The present invention relates, in part, to ternary azeotropic compositions and mixtures including chlorotrifluoropropene, methanol, and a third component selected from isohexane, trans-1,2-dichloroethylene, and petroleum ether. The present invention further relates to ternary azeotropic compositions and mixtures including chlorotrifluoropropene, cyclopentane, and a alcohol selected from methanol, ethanol, and isopropanol..
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Azeotrope topics: Hydrogen Fluoride, Refrigerant, Carbon Dioxide, Ethylene Glycol, Surfactant, Dental Adhesive, Tetrafluoro, Hydrofluorocarbon, Polymerization Process, Alkylene Glycol, Acetic Acid
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