Show Up e eP ec P r c n erVe 4 m Science Service Service Service Electric Charges lames Used se T Ceramic in Washing 0 b Clay Says a Chemist Savannah Ga Charges Charges of electricity are being used in novel industrial operations for washing undesirable constituents constituents constituents from certain materials and for drying clay for use in inS b S makin making chinaware scientists 7 attending the Savannah convention convention con- con of the Electrochemical society learned Novel applications of the fact that tt tiny colloidal particles of which f t such substances as clay are made up carry electric charges lie lic at atthe atthe i. i the base of the new procedures reported rc- rc ported by a Japanese scientist and an Ohio ceramics chemist Water with which clay is mixed in order to wash out the sand accompanying accompanying accompanying it when it is mined can be removed by running the water- water clay and-clay mixture through a special piece of electrical apparatus Carl E. E Curtis of the Simonds Worden Vorden i White company Dayton Ohio ex ex- How Particles Are Removed Since clay particles suspended in water have a negative charge they are attracted to and electroplated ed to a positively charged pole and are thus separated from the water suspension This process leaves a clay product containing only 35 per cent water which is easily removed In use abroad Jt it t is compared with the ordinary drying and filtering procedures in wide use in the United States Undesirable colloidal particles can be washed electro from a Variety variety variety va va- of materials by taking advantage advantage advantage tage of this same fact that colloidal colI colloidal col- col I electric particles carry an charge Sakuji Komagata a Japanese Japanese Japanese Jap- Jap anese government chemical engineer engineer engineer engi engi- neer in Tokyo revealed I Application of the proper electric charge to the material causes the undesired particles to migrate to an electrically-charged electrically point and thus to be removed from the material c The process has been successfully used in the manufacture of vulcanized r k fiber pulp for power cable r. r paper and condenser paper and photograPhic photographic photographic pho- pho films and plates h |