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7375254 |
Process for recovery of 1,1,1,3,3,3-hexafluoroisopropanol from the waste stream of sevoflurane synthesis
Provided is a process of obtaining 1,1,1,3,3,3-hexafluoro-2-propanol (“HFIP”) from a composition comprising an HFIP hydrolyzable precursor. The HFIP hydrolyzable precursor is a compound, other...
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7319173 |
Process for preparing fluorohalogenethers
A process for preparing (per)fluorohalogenethers having general formula:
wherein:
A and A′, equal to our different from each other, are selected among Cl, Br, H; m=1, 2; n=0, 1; R 1 is a...
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7288682 |
Separation of bifunctional perfluoropolyethers (PFPEs) having -CH2OH termination from their mixtures with -CH2OH monofunctional PFPEs
A process for separating bifunctional perfluoropolyethers (PFPEs) having two terminations —CH 2 OH from their mixtures with monofunctional PFPEs with one termination —CH 2 OH, of general...
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7247757 |
Method of producing a fluorine-containing vinyl ether compound
A method of producing a fluorine-containing vinyl ether compound, which contains the step of: fluorinating a compound of formula (I-1) or (I-2):
wherein R is a straight-chain, branched-chain or...
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7230147 |
Process for functionalizing a double bond
The invention concerns a method for functionalizing a double bond and, more particularly, a double bond bearing a metalloid atom. Said functionalization is produced by the action of perhalogenated...
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7193118 |
Method for producing fluoroalkyl ether
A method for producing a fluoroalkyl ether, which comprises reacting a fluoroalkyl alcohol with a fluorinated olefin in the presence of a solvent and a catalyst, wherein the fluoroalkyl alcohol and...
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7109383 |
Fluorine-containing allyl ether compounds, their copolymers, and resist compositions and anti-reflection film materials using such copolymers
The invention relates to a fluorine-containing allyl ether compound represented by the formula 1,
wherein R represents an organic group containing at least one fluorine atom and an alicyclic...
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7102031 |
Method for producing diene compound
It is an object to obtain from a mixture of a specific diene compound (1) and a compound (2) with the same molecular weight and molecular formula hard to separate by distillation, the diene...
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6849194 |
Methods for preparing ethers, ether compositions, fluoroether fire extinguishing systems, mixtures and methods
Highly fluorinated, saturated, and unsaturated fluoroethers are efficient, economical, non-ozone-depleting fire extinguishing agents used alone or in blends with other fire extinguishing agents in...
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6770776 |
Synthesis of fluorocarbon compounds
Fluorocarbon compounds are synthesized by reacting a substrate hydrocarbyl compound containing at least one sp 3 -hybridized halophoric carbon atom bearing at least two halogen atom substituents,...
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6300532 |
Process for addition of haloalkanes to alkenes catalyzed by an organophosphite compound
A process for catalytic addition of haloalkanes to alkenes involving the step of reacting the haloalkane with the alkene in the presence of a catalyst. The catalyst is an organophosphite compound...
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6300526 |
Hydro-fluoroalkylvinylethers and process for obtaining them
Hydro-2,2-difluoroalkylvinylethers having the formula CF 2 CH--O--R A (I) wherein R A is a radical containing fluorine, optionally containing halogens such as Cl, Br, I, hydrogen,...
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6271422 |
Method for fluoromethylation of alcohols via halogenative decarboxylation
A method for fluoromethylation of an alcohol via halogenative decarboxylation. The method includes the step of reacting an alcohol of the formula R 1 C(CX 3 ) 2 OH with an alpha-haloester of the...
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6245949 |
Synthetic method for the fluoromethylation of alcohols
A method for fluoromethylating halogenated alcohols. The method includes the step of providing an alpha-halogenated alcohol of the formula R 1 C(CX 3 ) 2 OH, wherein R 1 is selected from the...
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6100434 |
Method for synthesizing sevoflurane and an intermediate thereof
A method for synthesizing fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether. The method includes the step of combining in the presence of aluminum trichloride a quantity of hexafluoroisopropanol...
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6072088 |
Chemical compounds having two trifluoromethyl groups
A compound having the formula: CF 3 CH 2 -w (H 1 -x CH 2 -y R m R' n CH 1 -z) p H 2 -q CF 3 wherein w=0, 1 or 2; x=0 or 1; y=0, 1 or 2; m=0, 1 or 2; n=0 or 1; z=0 or 1; p=1 or 2; and q=0, 1...
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5886239 |
Method of preparing monofluoromethyl ethers
A method of preparing fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether (sevoflurane) and structurally related monofluoromethyl ethers in which the monochloromethyl ether precursor...
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5877357 |
Process for preparing perhaloethers from perhaloolefins and new perhaloethers thereby obtained
The invention relates to a process for preparing perhaloethers from perhaloolefins and to a few "per se" new classes of perhaloethers thereby obtained. The process consists in reacting a...
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5753776 |
Liquid-phase fluorination
This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
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RE35568 |
Method for fluorodecarboxylation
The present invention is directed to a method for replacing a carboxylic acid group with a fluorine group in a halogenated aliphatic carboxylic acid compound having the formula, R-COOH, to...
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5639921 |
Method of producing difluoromethyl ethers and esters and ethers and esters produced thereby
A process for producing difluoromethyl ethers and esters by reacting an ether or an acid with a cadmium, zinc or bismuth compound containing the CF 3 group and selected from the group consisting...
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5621144 |
Fluorinated compounds as oxygen transport agents
New compounds are described typically having the formula CH 3 C(CH 2 R) 3 or ZCH 2 C(CH 2 R) 3 where R is a fluorohydrocarbon or perfluorocarbon group, preferably containing 4-16 carbon atoms...
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5536885 |
Production of perfluoro(alkyl vinyl ethers)
Disclosed herein is a process for making perfluoro(alkyl vinyl ethers) by fluorination with elemental fluorine of selected novel partially fluorinated (di) chloroethyl ethers, followed by...
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5481046 |
Telechelic telomers of chlorotrifluoroethylene
Iodine terminated liquid telechelic telomers of chlorotrifluoroethylene (CTFE) containing an average of more than 1 CTFE unit per molecule are novel compounds. The telomers can be prepared by a...
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5481028 |
Lewis acid catalyzed conjugated iodofluorination of fluoroolefins
A process for the preparation of perfluoroalkyl iodides, especially perfluoroethyl iodide, by reaction of perfluorinated compounds which contain a carbon carbon double bond with ICl in HF solvent...
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5457242 |
2-bromo,1',2'-dichloroperfluoro diethyl ether and process for preparing same
A process for preparing the novel compound 2-bromo, 1', 2'-dichloroperfluoro diethyl ether of formula: BrCFhd 2--CF 2 --O--CFCl--CF 2 Cl where BrCF 2 --CF 2 OF is reacted with the olefin...
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5446211 |
Chlorination of difluoromethyl methyl ether
The synthesis of fluorinated dimethyl ethers of the formula CF 2 HOCCl x F y H 3 -(x+y) wherein x is 0, 1 or 2; y is 1, 2 or 3; and wherein (x+y) is 1, 2 or 3. The process involves chlorination...
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5420359 |
Chlorofluoroether compositions and preparation thereof
Normally liquid chlorofluoroether compositions consisting or consisting essentially of one or a selected mixture of perhalogenated chlorofluoroether compounds are provided by direct fluorination of...
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5416244 |
Preparation of isoflurane
An improved process for the production of isoflurane is disclosed. Isoflurane is formed by the exhaustive chlorination of 2,2,2-trifluoroethyl difluoromethyl ether with chlorine gas. The reaction...
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5371300 |
Chloro-(2-halogeno-1-fluoromethyl-ethoxy)-methanes and their preparation
The present invention relates to novel chloro-(2-halogeno-1-fluoromethyl-ethoxy)-methanes and to their preparation. The novel compounds can be used as intermediates for the preparation of...
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5278342 |
Vapor phase chlorination of difluoromethyl methyl ether
The synthesis of fluorinated dimethyl ethers of the formula CF 2 HOCCl x F y H 3 -(x+y) wherein x is 0, 1 or 2; y is 1, 2 or 3; and wherein (x+y) is 1, 2 or 3. The process involves chlorination...
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5230778 |
Purification of isoflurane by extractive distillation
A method for the separation of Isoflurane from its admixture with other compounds produced in the chlorination of 2-difluoromethoxy-1,1,1-trifluoroethane including subjecting the mixture to...
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5198136 |
Iodine-containing compound, preparation thereof and block copolymer comprising the same
An iodine-containing compound consisting of at least two repeating units selected from the formulae: --(CH 2 CF 2 CF 2 O) a -- --(CHClCF 2 CF 2 O) b -- --(CCl 2 CF 2 CF 2 O) c -- ...
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5196600 |
Synthesis of fluorinated dimethyl ethers
A novel process is disclosed for the synthesis of fluorinated dimethyl ethers of the formula CF 2 HOCCl x F y H 3 -(x+y) wherein x is 0, 1 or 2; y is 1, 2 or 3; and wherein the total x+y is 1, 2...
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5189227 |
1,2,4-trihalobutyl ethers
1,2,4-Trihalobutyl ethers of the formula ##STR1## in which X is halogen and R 2 is unsubstituted or halo-substituted C 1 -C 10 alkyl, C 3 -C 6 -cycloalkyl that is unsubstituted or substituted...
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5157066 |
Fluoroalkyl ether, surface modifying composition and method for modifying surface
A solid surface modifying composition comprising a film forming material and a fluoroalkyl ether ((Rf) m (CONH--X--NHCO--Y) m (m=1 or 2; Rf: perfluoropolyether chain; X: ##STR1## etc.; ##STR2##...
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5114715 |
Methods of use and compositions of (s)-isoflurane and (s)-desflurane
Disclosed is a method of inducing and maintaining anesthesia while avoiding concomitant liability of adverse effects comprising administering by inhalation to a warm blooded animal in need of...
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5087765 |
Process for preparing chlorotrifluoroethylene telomers and new telomers obtained
In the process for preparing chlorotrifluoroethylene telomers by reaction of chlorotrifluoroethylene with CF 3 CF or R x --CF 2 OF (wherein R x may be also a perfluoroalkyl radical having 1 to...
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5051535 |
Process for the preparation of extensively fluorinated aliphatic hydrocarbons having 1 or 2 bromine or chlorine atoms in the molecule
A process is described for the preparation of the title compounds from the corresponding iodine-containing compounds by reaction with bromide or chloride ions present as salts, in a dipolar aprotic...
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5017718 |
Process for preparing polyfluoroalkyl-substituted compounds
A process for preparing a perfluoroalkyl-substituted compound is disclosed. The process comprises reacting a halopolyfluoroalkane having 1 to 20 carbon atoms with a compound selected from the group...
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5013472 |
Chlorotrifluoroethylene telomers
New chlorotrifluoroethylene telomers and process for preparing them. Chlorotrifluoroethylene is reacted, at a temperature ranging from -100° to +40° C., with a fluoroxy compound of formula R x ...
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5001278 |
Novel fluorovinyl ether and copolymer comprising the same
A fluorovinyl ether of the formula: XCH 2 CF 2 CF 2 --(OCH 2 CF 2 CF 2 ) m --(OCFYCF 2 ) n --OCFCF 2 (I) wherein X is a hydrogen atom or a halogen atom (e.g. fluorine,...
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4973716 |
Process for preparing perfluoroethers by fluorination with elemental fluorine
A process for fluorinating hydrogenated ethereal compounds by direct reaction with elemental F 2 diluted with an inert gas, wherein the starting compound is in the liquid phase, said fluorination...
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4968836 |
Process for the preparation of substituted cyclopropanecarbaldehydes
The invention relates to a process for the preparation of cyclopropanecarbaldehydes of formula ##STR1## in which R 1 is C 1 -C 4 alkyl or benzyl, which comprises (a) reacting a tetrahydrofuran...
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4957986 |
Partially fluorinated polyesters from ketene acetals and fluorine monomers
Partially fluorinated polyesters are disclosed having increased biodegradability and water repellency. The incorporation of an ester group into the backbone of the partially fluorinated compound...
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4937391 |
Process for preparing perfluoro-(2-bromoethyl-vinyl-ether)
Preparing perfluoro-(2-bromoethyl-vinyl-ether) CBrF 2 --CF 2 --O--CFCF 2 by the dechlorination of 2-bromo-1',2'-dichloro-perfluorodiethyl-ether CBrF 2 --CF 2 --O--CClF--CClF 2 in the...
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4902835 |
Fluorinated butene derivatives and methods for their preparation
New chemical reactions of 1,1,2-trifluoro-1,3-butadiene provide simple access to a series of new fluorinated alkene derivatives. These derivatives provide a simple, general methodology for the...
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4900872 |
Process for the preparation of fluorohalogenated ethers starting from fluorooxy-compounds and halogenated olefins
Improved process for the preparation of fluorohalogenated ethers by reaction of a fluorinated fluorooxycompound with a halogenated olefin, performed in liquid phase, in the presence of an inert...
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4874902 |
Method for the preparation of fluoromethyl 1,1,1,3,3,3-hexafluoro-2-propyl ether
Fluoromethyl 1,1,1,3,3,3-hexafluoro-2-propyl ether is prepared by reacting bromine trifluoride and methyl 1,1,1,3,3,3-hexachloro-2-propyl ether or chloromethyl 1,1,1,3,3,3-hexachloro-2-propyl...
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4836944 |
Halogen-containing polyether and its use
A halogen-containing polyether which comprises a repeating unit structure of the formula: --(CH 2 CF 2 CF 2 O) a --(CHClCF 2 CF 2 O) b --(CCl 2 CF 2 CF 2 O) c --(CHFCF 2 CF 2 O) d ...
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