Method for producing purified quaternary ammonium compound aqueous solution
AssigneeTokuyama Corporation
InventorsHiroshi INOUE, Yuichiro KAWABATA
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Abstract
Provided is a method for producing a quaternary ammonium compound aqueous solution, said method being characterized in that: the quaternary ammonium compound aqueous solution contains not more than 1,000 ppm of organic impurities that have a molecular weight of not less than 1,000 g/mole; and a raw quaternary ammonium compound aqueous solution that contains specific quaternary ammonium ions and that contains metal impurities is brought into contact with a cation exchange resin which has a crosslinking degree of not less than 6 and counter ions of which are non-metal ions.
Claims8
A method for producing a purified quaternary ammonium compound aqueous solution, the method comprising bringing a crude quaternary ammonium compound aqueous solution into contact with a cation-exchange resin with a degree of cross-linking of 6 or more in which a counter ion is a non-metal ion type,
- wherein
- the quaternary ammonium compound aqueous solution comprises
- 1000 ppm or less of an organic impurity with a molecular weight of 1000 g/mol or more,
- a quaternary ammonium ion represented by Formula (1), and
- a metal impurity,
- where R1, R2, R3, and R4 are each independently an alkyl group having carbon number from 1 to 16, with the proviso that the carbon number of one or more alkyl groups of R1, R2, R3, and R4 is from 2 to 16.
Dependencies are inferred from the claim text.