Hydrotalcite-like Particulate Material and Method for Production Thereof

A hydrotalcite-like granular material,

• wherein the hydrotalcite-like granular material originates from drying of a material that contains at least a hydrotalcite-like substance and that has a water content of 70% or lower at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein.

A hydrotalcite-like granular material,

• wherein the hydrotalcite-like granular material, when prepared in a quantity of 10 g, adsorbs fluorine ions (F−) by an amount of 8 mg/g or more, when the hydrotalcite-like granular material of that quantity is added to and stirred for 60 minutes in a fluorine solution of a quantity of 1000 ml, whose fluorine ion (F−) concentration is 116 mg/l and which is adjusted to 20° C.

A method for production of a hydrotalcite-like granular material, comprising drying a material that contains at least a hydrotalcite-like substance and water at equal or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein.

A method for production of a hydrotalcite-like granular material, comprising drying a material that contains at least a hydrotalcite-like substance and that has a water content of 70% or lower at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein.