| abstract |
The present invention is a novel hydrotalcite compound that is environmentally friendly and exhibits an excellent metal corrosion prevention effect when added in a small amount, and an inorganic ion scavenger using the compound. The hydrotalcite compound is hydrotalcite in a powder X-ray diffraction pattern. It has a peak of a site compound, a peak intensity at 2θ = 11.4 ° to 11.7 ° is 3,500 cps or more, and a BET specific surface area exceeds 30 m 2 / g. 1). Mg a Al b (OH) c (CO 3 ) d · nH 2 O (1) In the formula (1), a, b, c, and d are positive numbers and satisfy 2a + 3b−c−2d = 0. N represents the number of hydration and is 0 or a positive number. |