Process for preparing tetrafluoroborate salt and intermediates thereof
AssigneeLithdyn International
InventorsW. Novis Smith, Joel McCloskey
Life of this patent
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Abstract
There is provided a process for preparing tetraalkyl ammonium halide utilizing a catalytic amount of acetonitrile in a reaction under pressure and at an elevated temperature of an alkyl halide and a trialkyl halide and in which tetrafluoroborate can be subsequently prepared.
Claims15
A process for preparing tetraalkyl ammonium tetrafluoroborates which comprises the steps of:
- A. reacting a trialkyl amine with at least a 20% excess of an alkyl halide and in an amount of about 5 to 50% by weight of the reaction mixture at a temperature of about 70 to 180° C. and at a pressure of about 80 to 200 psi in a reactor to form tetraalkyl ammonium halide;
- B. removing any volatile components including acetonitrile, from said reactor, and then;
- C. reacting aqueous fluoroboric acid with the remaining contents of said reactor in step B in situ to form tetraalkyl ammonium tetrafluoroborate.
A process for preparing tetraalkyl ammonium halide which comprises reacting a trialkyl amine having 3 to 24 carbon atoms with at least a 20% excess of an alkyl halide having up to 18 carbon atoms and acetonitrile in an amount of about 5 to 20% by weight of the reaction mass at a temperature of about 70 to 180° C. and a pressure up to about 80 to 200 psi in a reactor.
Dependencies are inferred from the claim text.