Synthetic mineral microparticles

{
  "publication_number": "US5989714A",
  "country": "US",
  "kind": "A",
  "title": "Synthetic mineral microparticles",
  "abstract": "A composition comprising the product precipitated in the admixing of a soluble metal salt and one or more compounds having a component selected from silicates, phosphates and borates; and a method for controlling drainage and/or retention in the formation of a paper matrix or for treating water comprising the use of such product.",
  "claims": [
    "1. A composition comprising the microparticle product precipitated in the admixing of a soluble metal salt selected from the group consisting of magnesium, iron, copper, zinc, zirconium, yttrium, lanthanum and cerium and one or more compounds having a component selected from the group consisting of silicates, phosphates and borates wherein said product is represented by an empirical formula selected from the group consisting of M(I) w Al x Si y P x O.sub.(0.5w+1.5x+2y+2.5z); M(I) w Al x Si y B x O.sub.(0.5w+1.5x+2y+1.5z); M(I) w M(II) x Al y Si x O.sub.(0.5w+x+1.5y+2z); M(I) w M(III) x Al y Si z O.sub.(0.5w+0.5ax+1.5y+2z); M(I) w M(IV) x Al y Si z O.sub.(0.5w+1.5x+1.5y+2z); wherein M(I) is hydrogen, lithium, sodium, or potassium; Al is aluminwn; Si is silicon: P is phosphorus; O is oxygen; B is boron; M(II) is magnesium, calcium, strontium, or barium; M(III) is a transition metal of the first, second or third series or the actinides; M(IV) is a metal of the lantlianide series; a is the valency value of the M(III) metal; w is a value greater than zero and balances the election charge created by the values of x, y and z; and x, y and z are each independently a value from about 0.1 to about 10.0.",
    "2. The composition of claim 1 wherein the soluble metal salt is zink."
  ],
  "cpc": [
    "C02F 1/5236",
    "C01B 33/00",
    "C01B 35/12",
    "C02F 1/56",
    "C02F 1/76",
    "D21H 21/10",
    "D21H 23/12",
    "Y10T 428/2982"
  ],
  "assignees": [
    "MINERALS TECH INC"
  ],
  "filing_date": "1998-05-04",
  "publication_date": "1999-11-23",
  "grant_date": "1999-11-23",
  "priority_date": "1995-11-08",
  "application_number": "US-7263898-A",
  "family_id": "24216509",
  "citations": [
    "US1499492A",
    "US1656604A",
    "US2970889A",
    "US3514268A",
    "US3784442A",
    "US4213874A",
    "US4329328A",
    "US4749444A",
    "US4830843A",
    "US4891197A",
    "US5032227A",
    "US5279807A",
    "WO9204091A1"
  ]
}