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US 9,000,204 B2Granted
Process for the preparation of fluoroalkyl (fluoro)alkyl carbonates and carbamates
AssigneeSolvay Flour GmbH
InventorsMartin Bomkamp, Jens Olschimke
Life of this patent
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Abstract
Fluoroalkyl alkyl carbonates and fluorosubstituted carbamates which are suitable as additives or solvents in lithium ion batteries are prepared from fluoroalkyl fluoroformates and the respective alcohol or amine. Methanol is the preferred alcohol, dimethylamine and diethylamine are preferred amines. Fluoromethyl methyl carbonate is the preferred compound to be produced. Fluoroalkyl fluoroformates can be prepared from aldehydes and carbonyl fluoride.
Claims11
A process for the manufacture of fluoroalkyl carbonates of the general formula (I), FCHR—OC(O)—OR′,
- wherein R is selected from the group consisting of linear or branched alkyl with 1 to 5 carbon atoms;
- CH2═CHX wherein X is CH2 or C2H4;
- CH(CH3)═CH;
- C(CH3)2═CH;
- and H, and wherein R′ is selected from the group consisting of linear or branched alkyl with 1 to 7 carbon atoms ;
- linear or branched alkyl with 2 to 7 carbon atoms, substituted by at least one fluorine atom ;
- phenyl ;
- phenyl substituted by one or more C1 to C3 alkyl groups;
- phenyl substituted by one or more chlorine or fluorine atoms ;
- and benzyl;
- said process comprising a step of reacting a fluoroalkyl fluoroformate of formula (II), FCHROC(O)F, with an alcohol of formula (III), R′OH, wherein R and R′ have the same meanings as for formula I.
8 more elements
Dependencies are inferred from the claim text.