Method for preparing aqueous quaternary ammonium hydroxide solution
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsTetsuo Aoyama, Toshio Kondo, Yasushi Sugawara, Masahiro Miyake
Life of this patent
Estimating the term…
Abstract
The present invention-provides a method for preparing a high-purity aqueous quaternary ammonium hydroxide solution, and there is here disclosed this method for preparing the high-purity aqueous quaternary ammonium hydroxide solution which comprises reacting a quaternary ammonium organic acid salt with hydrogen peroxide, oxygen or an oxygen-containing gas in the presence of a platinum group metal catalyst to produce a quaternary ammonium inorganic acid salt, and then electrolyzing this inorganic acid salt by the use of an electrolytic tank having a cation exchange membrane.
Claims18
A method for preparing an aqueous quaternary ammonium hydroxide solution which comprises the steps of reacting an aqueous solution of a quaternary ammonium organic acid salt represented by the formula (1) ##STR2## wherein each of R.sup.1 to R.sup.4 is an alkyl group having 1 to 3 carbon atoms, and R.sup.1 to R.sup.4 are mutually identical or different;
- and X is an organic acid radical, with hydrogen peroxide, oxygen or an oxygen-containing gas in the presence of a platinum group metal catalyst to obtain a quaternary ammonium inorganic acid salt, and then electrolyzing the aqueous solution of the quaternary ammonium inorganic acid salt.
Dependencies are inferred from the claim text.