OIL DETERIORATION INHIBITOR MADE FROM SHIRASU, AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a deterioration inhibitor having high safety, capable of suppressing oxidation of oil; and a manufacturing method thereof.;SOLUTION: Shirasu mainly composed of SiO2 and Al2O3 is heated, agitated, and screened to produce fine grained Shirasu. Clay with an iron content in the range from 0.01 to 0.1% and water are added to the fine grained Shirasu. The mixture is kneaded, dried, and fired to produce an oil deterioration inhibitor. The manufacturing method thereof includes: a primary processing step for heating and agitating Shirasu in the range of 350°C to 450°C; a selecting step for separating the Shirasu into fine grained Shirasu with a grain size of 0.05 mm mesh and fine grained Shirasu with a grain size of 0.03 mm mesh; a forming step for mixing the fine grained Shirasu with a grain size of 0.05 mm mesh and the fine grained Shirasu with a grain size of 0.03 mm mesh at a ratio of 1:4, and adding 10 to 20% aqueous clay composed of clay with an iron content in the range from 0.01 to 0.1% and water to the fine grained Shirasu, and kneading and drying the mixture; and a secondary processing step for firing the formed product in a furnace atmosphere at a high temperature of 1300°C or higher.;COPYRIGHT: (C)2014,JPO&INPIT