AGROCHEMICAL, AGROCHEMICAL CARRIER AND METHOD FOR MANUFACTURING THE CARRIER

摘要

PROBLEM TO BE SOLVED: To enable the stable supply of a carrier to be used for an agrochemical preparation at a low cost. SOLUTION: Combustion ash obtained by burning fine coal is pulverized and classified to collect fine powder having an average particle size of <=40μm. The resultant coal ash having the average particle size of <=40μm is soaked in a 5 normal hydrochloric acid, and it is kept at >=80 deg.C for at least 30 min to elute iron and alkali metals which are exposed on the surface of the coal ash. After holding it at the temperature for at least 30 min, the mixture is subjected to solid-liquid separation to collect the solid component (combustion ash), the resultant solid component is optionally subjected to acid neutralization with alkali, washing with water and so on, and the product is used in an agrochemical preparation as an agrochemical carrier.