Patents Assigned to Asada Mill Co., Ltd.
Patents Assigned to Asada Mill Co., Ltd. Process for treating talc. Patent number: 4978516 Abstract: A process for improving a purity and/or whiteness degree of a talc powder is disclosed. A talc powder with a particle size of about 0.8 mm or less containing impurities such as asbestos, etc. is treated with a phosphoric acid agent under heating ...
WhatsApp: +86 18221755073