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US 7,491,846 B2Granted
Process for producing hydroxylamine
AssigneeShowa Denko K.K.
InventorsTakanori Aoki, Toshitaka Hiro
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AssigneeShowa Denko K.K.
InventorsTakanori Aoki, Toshitaka Hiro
Estimating the term…
It is an object of the present invention to provide a process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, where the yield reduction due to formation of a complex between the produced hydroxylamine and a salt produced as a by-product or adsorption of the hydroxylamine to the by-product salt is decreased, and a high-concentration and high-purity hydroxylamine is safely produced at a high yield. The process for producing a hydroxylamine of the present invention comprises a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine while keeping the reaction solution at a pH of 7 or more, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.
A process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, comprising
A process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, comprising a reaction step of performing the reaction by adding a salt of hydroxylamine to a reaction solution containing an alkali compound, wherein said reaction step is performed while keeping the reaction solution at a ph of 7 or more.
A process for producing a hydroxylamine, comprising a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.
Dependencies are inferred from the claim text.