Methods of preventing scaling involving inorganic compositions, and inorganic compositions therefor

Abstract

A composition including ground calcium carbonate and sodium montmorillonite. A composition including magnesium aluminum silicate and sodium montmorillonite. An aqueous pulp slurry, including wood pulp, metal cations, anions, and about 50 to 500 ppm of an anti-scalant comprised of at least one of magnesium aluminum silicate, hydrated magnesium aluminum silicate, saponite, sepiolite, calcium carbonate, magnesium carbonate, ferrous carbonate, manganese carbonate, dolomite, hectorite, amorphous magnesium silicate, and zinc carbonate.

What is claimed is:  
     
         1 . A composition, comprising: 
 ground calcium carbonate; and    sodium montmorillonite.    
     
     
         2 . The composition of  claim 1 , wherein a weight ratio of ground calcium carbonate to sodium montmorillonite is about 0.1:1 to 20:1.  
     
     
         3 . The composition of  claim 1 , comprising about 10 wt % to 95 wt % of the ground calcium carbonate.  
     
     
         4 . The composition of  claim 1 , comprising about 5 wt % to 90 wt % of the sodium montmorillonite.  
     
     
         5 . A composition, comprising: 
 magnesium aluminum silicate; and    sodium montmorillonite.    
     
     
         6 . The composition of  claim 5 , wherein a weight ratio of magnesium aluminum silicate to sodium montmorillonite is about 0.1:1 to 20:1.  
     
     
         7 . The composition of  claim 5 , comprising about 10 wt % to 95 wt % of the magnesium aluminum silicate.  
     
     
         8 . The composition of  claim 5 , comprising about 5 wt % to 90 wt % of the sodium montmorillonite.  
     
     
         9 . An aqueous pulp slurry, comprising: 
 wood pulp;    metal cations;    anions; and    about 50 to 500 ppm of an anti-scalant comprised of at least one of magnesium aluminum silicate, hydrated magnesium aluminum silicate, saponite, sepiolite, calcium carbonate, magnesium carbonate, ferrous carbonate, manganese carbonate, dolomite, hectorite, amorphous magnesium silicate, and zinc carbonate.    
     
     
         10 . The aqueous pulp slurry of  claim 9 , wherein the anti-scalant has a mean particle size less than about 10 microns.  
     
     
         11 . The aqueous pulp slurry of  claim 9 , wherein the anti-scalant has a specific surface area of about 10 to 1000 m 2 /g.  
     
     
         12 . The aqueous pulp slurry of  claim 9 , wherein the aqueous composition has a pH of about 9 to 14.