Synthetic mineral microparticles
AssigneeMinerals Technologies Inc.
InventorDonald Kendall Drummond
Life of this patent
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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.
Claims2
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).sub.w Al.sub.x Si.sub.y P.sub.x O.sub.(0.5w+1.5x+2y+2.5z) ;
- M(I).sub.w Al.sub.x Si.sub.y B.sub.x O.sub.(0.5w+1.5x+2y+1.5z) ;
- M(I).sub.w M(II).sub.x Al.sub.y Si.sub.x O.sub.(0.5w+x+1.5y+2z) ;
- M(I).sub.w M(III).sub.x Al.sub.y Si.sub.z O.sub.(0.5w+0.5ax+1.5y+2z) ;
- M(I).sub.w M(IV).sub.x Al.sub.y Si.sub.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.
Dependencies are inferred from the claim text.