Method for storing quaternary ammonium salt
OwnerNaoki Hirano, Masako Saijyoinventors
Life of this patent
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Abstract
A method of improving the stability of a quaternary ammonium salt and a method of efficiently preparing the quaternary ammonium salt having improved stability.
Claims12
A method of preserving a quaternary ammonium salt represented by the following general formula (I),
- 7
- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms, and X is halogen atom,
- (a) in the form of a hydrous quaternary ammonium salt containing 60 to 99% by weight of said quaternary ammonium salt and 40 to 1% by weight of water;
- (b) by dissolving 100 parts by weight of said quaternary ammonium salt in 200 to 4000 parts by weight of water, and by freezing the thus obtained aqueous solution;
- or
- (c) by decreasing the content of a triazine compound represented by the following general formula (II),
- 8
- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, and X is a halogen atom,
- contained as an impurity in the quaternary ammonium salt down to smaller than 1% by weight and preserving said quaternary ammonium salt at a temperature of not higher than 25° C.
A hydrous quaternary ammonium salt containing 60 to 99% by weight of a quaternary ammonium salt represented by the following general formula (I),
- 9
- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms, and X is a halogen atom,
- and 40 to 1% by weight of water.
A quaternary ammonium salt represented by the following general formula (I),
- 10
- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms, and X is a halogen atom,
- containing a triazine compound represented by the following general formula (II),
- 11
- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, and X is a halogen atom,
- in an amount of smaller than 1% by weight.
A condensing agent containing 100 parts by weight of a quaternary ammonium salt represented by the following general formula (I),
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- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms, and X is a halogen atom,
- and 200 to 4000 parts by weight of water.
A condensing agent comprising a quaternary ammonium salt represented by the following general formula (I),
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- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms, and X is a halogen atom,
- containing a triazine compound represented by the following general formula (II),
- 19
- wherein R1 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 8 carbon atoms, and X is a halogen atom,
- in an amount of smaller than 1% by weight.
Dependencies are inferred from the claim text.