Method for purifying yellow phosphorus and method for producing high-purity phosphoric acid
AssigneeRin Kagaku Kogyo Co., Ltd.
InventorsManabu Takanaga, Norihiro Tsukada, Katsuhiro Yano, Akinori Shimono
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Abstract
The disclosure relates to a method for purifying yellow phosphorus including bringing yellow phosphorus and wood-based activated carbon into contact with each other. The disclosure also relates to a method for producing high-purity phosphoric acid including generating a gas of phosphorus pentoxide by burning yellow phosphorus obtained by the purifying method and then hydrating the gas.
Claims2
A method for producing purified yellow phosphorus, comprising bringing liquid yellow phosphorus and an activated carbon into contact with each other, wherein the activated carbon is produced from a wood raw material, the wood raw material is at least one member selected from the group consisting of sawdust, bark, lignin, sawdust carbide, and bamboo, and
- wherein the contact of the yellow phosphorus and the activated carbon is performed at 60° C. or higher and 80° C. or lower, and
- the average pore diameter of the weed-based-activated carbon is 2.5 nm to 5.0 nm more.
Dependencies are inferred from the claim text.