Aqueous zinc nitrite solution and method for preparing the same
AssigneeNippon Chemical Industrial Co., Ltd.
InventorsYutaka Kinose, Takahiro Nagayama, Toru Hata
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Abstract
An aqueous zinc nitrite solution contains as impurities 10 ppm or less of sodium (Na) and 100 ppm or less of sulfate ions (SO4) when the aqueous solution has a concentration of zinc nitrite [Zn(NO2)2] of 10% by weight in terms of NO2. Also, disclosed is a method for preparing an aqueous zinc nitrite solution, including a first step of reacting zinc sulfate with calcium nitrite to form an aqueous zinc nitrite solution and a second step of purifying the aqueous zinc nitrite solution.
Claims4
An aqueous zinc nitrite solution characterized in that the solution contains as impurities 10 ppm or less of sodium (Na) and 100 ppm or less of sulfate ions (SO42−) calculated when the aqueous solution has a concentration of zinc nitrite [Zn(NO2)2] set out 10% by weight in terms of NO2.
A method for preparing an aqueous zinc nitrite solution, comprising a first step of reacting zinc sulfate with calcium nitrite to form an aqueous zinc nitrite solution and a second step of purifying the aqueous zinc nitrite solutions.
Dependencies are inferred from the claim text.