POWDER, METHOD OF PRODUCING POWDER, AND ADSORPTION APPARATUS

摘要

The present invention provides that powder is mainly constituted from secondary particles of hydroxyapatite. The secondary particles are obtained by drying a slurry containing primary particles of hydroxyapatite and aggregates thereof and granulating the primary particles and the aggregates. A bulk density of the powder is 0.65 g/mL or more and a specific surface area of the secondary particles is 70 m2/g or more. The powder of the present invention has high strength and is capable of exhibiting superior adsorption capability when it is used for an adsorbent an adsorption apparatus has.

主权项

1. A method of producing powder including secondary particles mainly formed of hydroxyapatite, the method comprising:
mixing a first liquid containing a calcium source to be a raw material of the hydroxyapatite with a second liquid containing a phosphoric source to be the raw material of the hydroxyapatite to obtain a mixture; reacting the calcium source with the phosphoric source with stirring the mixture to obtain a slurry containing primary particles of the hydroxyapatite and aggregates thereof; physically crushing the aggregates contained in the slurry to disperse the crushed aggregates in the slurry; and granulating the primary particles and the crushed aggregates by spraying and drying the slurry to obtain the secondary particles.