Coated particles, method of producing coated particles and adsorption apparatus

摘要

Coated particles according to the present invention are comprised of particles each having a surface. At least the vicinity of the surface of the particle is constituted of a calcium phosphate-based compound. The particles are coated with a polyamine-based compound, and an average particle size of the particles is 1 μm or more. Furthermore, such coated particles are produced by preparing a preparation liquid containing a liquid containing at least one of water and an alcohol, the coated particles and the polyamine-based compound and then heating the preparation liquid to coat the particles with the polyamine-based compound. Furthermore, it is preferred that the liquid used in preparing the preparation liquid contains methanol as a main component thereto.

主权项

1. Coated particles comprising: particles each having a surface, and at least the vicinity of the surface being constituted of a calcium phosphate-based compound having phosphate groups and calcium;
wherein at least a part of the surface of each of the particles is coated with a polyamine-based compound having amino groups and a network structure represented by the following chemical formula where “n” is an integer of 1 or more, and an average particle size of the particles is 1 μm or more, and wherein at least a part of the amino groups is bonded to the phosphate groups, and at least the calcium, the phosphate groups and the amino groups are exposed to the surface of each of the particles and an amount of the calcium exposed to the surface is lower than an amount of the phosphate groups exposed to the surface, so that the coated particles have adsorption capability with respect to both a substance having negative electrical charge in the calcium and the amino groups and a substance having positive electrical charge in the phosphate groups.