Ionic liquids and their use as solvents

  • US 20040097755A1
  • Filed: 07/07/2003
  • Published: 05/20/2004
  • Est. Priority Date: 09/27/2000
  • Status: Active Grant
First Claim
Patent Images

1. An ionic compound, having a freezing point of up to 100°

  • C. formed by the reaction of at least one amine salt of the formula R1R2R3R4 N+X





    (I) with at least one organic compound (II) which is capable of forming a hydrogen bond with X

    , wherein R1, R2, R3 and R4 are each independently;



    H, optionally substituted C1 to C5 alkyl, optionally substituted C6 to C10 cycloalkyl, optionally substituted C6 to C12 aryl optionally substituted C7 to C12 alkaryl, or wherein R1 and R2 taken together represent a C4 to C10 optionally substituted alkylene group, thereby forming with the N atom of formula I a 5 to 11-membered heterocyclic ring, X

    is NO3

    , F, Cl

    , Br

    , I

    , BF4

    , ClO4

    , CN

    , SO3CF3

    , or COOCF3

    , and wherein the term “

    optionally substituted”

    means that the group in question may or may not be substituted with at one or more groups selected from OH, SH, SR5, Cl, Br, F, I, NH2, CN, NO2, COOR5, CHO, COR5 and OR5, wherein R5 is a C1 to C10 alkyl or cycloalkyl group, wherein the molar ratio of I to II is from 1;

    1.5 to 1;

    2.5.

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