Oil absorbent and oil absorbent manufacturing method

摘要

Disclosed are an oil absorbent and an oil absorbent manufacturing method for the purpose of recovering oil from water. The oil absorbent is characterized in comprising inorganic particles and a polymer formed on the surface of or between these inorganic particles; the content rate of inorganic particles is no less than 50 vol% and no more than 97 vol% with respect to the inorganic particles and the polymer; and the surface area of the inorganic particles is no less than 30% and no more than 60% with respect to the cross section of the inorganic particles and the polymer. Furthermore, the manufacturing method for oil absorbent particles has a step wherein inorganic particles, a polymer, and a solvent are mixed and a slurry solution is prepared, and a step wherein the slurry solution is sprayed in an environment wherein the temperature is at least 30°C higher than the boiling point of the solvent.