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특허 상세정보

Methods for stabilizing hydrous kaolin

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C08K-003/34    C08K-003/36    C09C-001/42   
미국특허분류(USC) 524/447; 524/425; 524/791; 524/445; 106/487
출원번호 US-0641358 (2009-12-18)
등록번호 US-8664319 (2014-03-04)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    DiLorenzo, Laura C.
인용정보 피인용 횟수 : 1  인용 특허 : 10
초록

This invention is directed to a method of stabilizing high solid slurries, like kaolin slurries, the method comprises causticizing the sodium polycrylate or polyacrylic acid used in a dispersant blend to a pH of above 9. The method comprises a homogeneous dispersant blend of sodium carbonate, sodium polyacrylate, sodium silicate, and sodium hydroxide. This invention is also directed to a method of stabilizing high solid slurries, like kaolin slurries, by adding sodium polyacrylate at an acidic pH range or polyacrylic acid solution to the slurries: and ad...

대표
청구항

1. A method of stabilizing a hydrous kaolin slurry containing greater than 65% hydrous kaolin by weight comprising adding a dispersant blend comprising sodium carbonate in an amount of from 5% to 50% by weight, sodium polyacrylate and/or polyacrylic acid in an amount of from 15% to 45% by weight, sodium silicate in an amount of from 15% to 55% by weight, and sodium hydroxide in an amount of from greater than 0% to 25% by weight, based on the weight of the dispersant blend to said hydrous kaolin slurry, said hydrous kaolin slurry being devoid of a phospha...

이 특허에 인용된 특허 (10)

  1. Kelley Edwin L. (Succasunna NJ). Binary deflocculating compositions. USP1988054742105.
  2. Norris Joseph Allen ; Yordan Jorge L.. Kaolin clays which are conditioned prior to removing impurities. USP1999126007618.
  3. Hen John ; Young Ray ; Ginez Andres ; Mathur Sharad. Low sheen opacifying pigments and manufacture thereof by calcination of kaolin clay. USP2000106136086.
  4. Williams Danny L. (Macon GA) Gantt George E. (Milledgeville GA) Behl Sanjay (Macon GA) Willis Mitchell J. (Macon GA). Method for separating mixture of finely divided minerals. USP1997025603411.
  5. John Hen ; Ray Young ; Andres Ginez ; Sharad Mathur. Paints containing low sheen opacifying pigments obtained by flux calcination of kaolin clay. USP2002026346145.
  6. Bilimoria Bomi M. (Macon GA) Thompson William E. (Sandersville GA). Process for producing a kaolin clay product. USP1993065223463.
  7. D. R. Nagaraj ; Roderick G. Ryles ; Alan S. Rothenberg. Process for removing impurities from kaolin clays. USP2002056390301.
  8. Shi Joseph C. S. (Bartow GA) Yordan Jorge L. (Sandersville GA). Process for removing impurities from kaolin clays. USP1996065522986.
  9. Koppelman Mitchell H. (North Plainfield NJ) Migliorini Ingrid K. (Linden NJ). Processing of kaolinitic clays at high solids under acidic conditions. USP1987034650521.
  10. Shi Joseph C. S. (Bartow GA) Blue William H. (Wrightsville GA) Bruns Jeffrey C. (Sandersville GA). Stable high solids slurries of structured clay materials and process for the manufacture thereof. USP1996085543372.