Method for producing high-purity quaternary ammonium salt

Details Method for producing high-purity quaternary ammonium salt Method for producing high-purity quaternary ammonium salt

2007-09-18

2011-10-04

Gonzalez, Porfirio Nazario (Department: 1621)

Compositions

Electrolytes for electrical devices

C564S296000

Reexamination Certificate

active

08029689

ABSTRACT:
A process for preparing a high-purity quaternary ammonium salt comprising:(1) adding an oxide or hydroxide of a Group 1, 2, 12 or 13 metal to a quaternary ammonium salt containing a protonic acid salt of a tertiary amine as an impurity and thereby neutralizing the tertiary amine protonic acid salt with the metal oxide or hydroxide to convert the acid salt to a tertiary amine and water and to convert the metal oxide or hydroxide to a metal salt at the same time, and(2) removing the tertiary amine, water and metal salt produced from the system.

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Database WPI Week, 200569, Thomson Scientific, London, GB; AN 2005-670718, XP002600618 & JP 2005-272311,Oct. 6, 2005, Abstract.

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