Patent ID: 8309736

Claim:
A method for reducing the use of organic solvent comprising substituting an organic solvent with an ionic liquid comprising a salt associating an ammonium cation with an alkyl H-phosphonate anion fitting the following formula I: wherein R represents a saturated or unsaturated C1-C14 hydrocarbon radical, optionally substituted with a function selected from the group consisting of ethers, esters, thioesters and amides; R1 represents a C1-C6 hydrocarbon radical; the bond in dotted lines may either be present or not, the radical R4 then being present or absent, if the radical R4 is present, the bond with R3 is a single bond, and R2, R3 and R4 represent independently of each other a C1-C6 hydrocarbon radical or R3 and R4 form together a heterocycloalkyl radical with 5 or 6 members, the heterocycloalkyl radical may have in addition to the nitrogen atom which bears them, one or more hetero-atoms selected from N and O, the heterocycloalkyl radical may be substituted with one or more C1-C6 alkyl radicals and R2 represents a C1-C6 hydrocarbon radical, if the radical R4 is absent, the bond with R3 is a double bond, and R2 and R3 form together a heteroaromatic radical with 5 or 6 members, the heteroaromatic radical may have, in addition to the nitrogen atom which bears them, one or more hetero-atoms selected from N and O, the heteroaromatic radical may be substituted with one or more C1-C6 alkyl radicals.