Nippon Oil Fats Co., Ltd.

Hirozumi Shimizu

Taizo Igarashi

Takaharu Ishizaki

Hideki Takahashi

Noboru Kiso

Toshio Koma

Dusts can be effectively prevented by spreading an aqueous solution containing both nonionic surface active agent and polyhydric alcohol on the substances which develop dusts.

Method of preventing dusts

Coal dispersing oil compositions containing 10-89.99% by weight of a petroleum oil, 10-89.99% by weight of coal powders and 0.01 to 5% by weight of a surface active agent are produced by mixing previously milled coal powders and a petroleum oil and then dehydrating, or by millng and dehydrating coal in the petroleum oil, and then adding a surface active agent thereto to obtain dispersion.

Method for producing coal dispersing oil compositions

Coal dispersing oil compositions containing 10-90% by weight of a petroleum oil, 10-90% by weight of coal powders and 0.01-5% by weight of at least one surface active agent selected from phosphoric esters, salts of phosphoric esters, organic sulfonic acids, salts of organic sulfonic acids, sulfuric esters and salts of sulfuric esters.

Growing community of inventors

Amagasaki, Japan

Hirozumi Shimizu