Patent ID: 6784317
Filing Date: 2004-08-31
Classification: C07C

Abstract:
A method for producing a quaternary ammonium salt of inorganic acid, which comprises:a step of reacting a tertiary amine represented by the following Formula 2: wherein R4, R5 and R6 are the same or different, and each is alkyl, alkenyl or aryl, each optionally having a substituent group, a pair of R4, R5 and R6 being optionally bonded to form an aliphatic or aromatic ring together with nitrogen to which the pair are bonded, or one of R4, R5 and R6 being optionally bonded to the other two to form two-ring structure,with a hydroxycarboxylic ester represented by the following Formula 1: wherein R1 is alkyl, alkenyl, aralkyl or aryl, R2 and R3 are the same or different and each is hydrogen, alkyl, alkenyl, aralkyl or aryl, thereby producing the quaternary ammonium hydroxycarboxylate represented by the following Formula 3: wherein R1 to R6 are the same as defined above; anda step of reacting the quaternary ammonium hydroxycarboxylate represented by the Formula 3 with an inorganic acid, thereby producing the quaternary ammonium salt of inorganic acid represented by the following Formula 5: wherein R1 and R4 to R6 are the same as defined above, and X is an acid radical of the inorganic acid, the inorganic acid being at least one acid selected from the group consisting of hydrogen fluoride, boron trifluoride, mixture of hydrogen fluoride and boron trifluoride, tetrafluoroboric acid, hydrogen chloride, hydrogen bromide, hydrogen iodide, nitric acid, sulfuric acid, phosphoric acid, boric acid, perchloric acid and phosphohydrofluoric acid.