|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B03D-003/06 C04B-033/04 C04B-033/10|
|미국특허분류(USC)||106/487 ; 106/488 ; 501/148 ; 252/18726|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 32 인용 특허 : 8|
A method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay. By combining the two beneficiating techniques of selective flocculation and ozonation, a synergistic phenomena occurs and a clay product of superior brightness and whiteness can be obtained from fine discolored clays that cannot be achieved by beneficiation with either process singularly. By passing the flocced clay through ozonation, the flocculant polymer left in the clay can be completely destroyed.
A method for beneficiating a low brightness, fine particle size discolored kaolin crude to produce a high brightness coating clay having a brightness of a least 89, comprising the steps of: preparing a dispersed aqueous slurry from a fine particle size discolored crude kaolin having a solids content, a water washed G.E. brightness in the range of 75 to 85, a contaminant titania content of from 0.5 to 3.0%, a contaminant iron content of from 0 to 2%, expressed as Fe2O3, and a P.S.D. such that at least 85% by weight of the particles are of less than 2 m90%...