Method for estimating content of fine particles inslurry and process for producing hydrocarbon oil

摘要

A method for estimating a particulate content in a slurry of the present invention is a method for estimating a content of particulates having a predetermined particle size or less in a slurry with solid particles dispersed in hydrocarbons including a wax, the method including, based on a correlation between a visible light transmittance and a content of solid particles having the predetermined particle size or less at a temperature at which hydrocarbons including a wax are liquefied when the solid particles having the predetermined particle size or less are dispersed in the hydrocarbons, estimating a content of particulates having the predetermined particle size or less in the slurry from a visible light transmittance of a supernatant part when the slurry is left to stand at the temperature.