Moisture-resistant calcium containing particles

Free-flowing moisture resistant calcium-containing particles comprising:

• a core comprising a hygroscopic calcium-containing material and an essentially calcium free soluble coating wherein the soluble coating further comprises a hydrophobic material to inhibit moisture uptake by the core.

Free-flowing moisture resistant calcium-containing particles comprising:

• a core comprising a hygroscopic calcium-containing material, a soluble coating, and a hydrophobic layer between the core and the soluble coating.

Free-flowing moisture resistant calcium-containing particles comprising:

• a core comprising a hygroscopic calcium-containing material, a soluble coating, and an insoluble layer between the core and the soluble coating.

Moisture resistant calcium-containing particles comprising:

• a hygroscopic, calcium-containing core and an essentially calcium free soluble coating on an outer surface of the core to inhibit moisture uptake by the core, the core comprising calcium chloride, calcium nitrate, calcium formate, calcium acetate, a calcium salt of an organic acid, a calcium saccharide compound or a combination thereof.

A composition useful as a soil amendment comprising:

• granules having a calcium chloride core and an essentially calcium free, soluble nitrogen-containing coating selected from the group consisting of urea, ammonium nitrate, urea phosphate, melamine urea aldehyde polymers, monoammonium phosphate, diammonium phosphate and combinations thereof;
• wherein the coating inhibits moisture uptake by the core.

Free-flowing, urea-coated calcium chloride particles comprising:

• from 5 to 35 parts by weight urea and 100 parts by weight calcium chloride including any water of hydration wherein the urea and the calcium chloride form a urea-calcium chloride adduct layer between the core and the coating;
• and a particle size distribution substantially between 0.4 and 5 mm.

Free-flowing, urea-coated calcium chloride particles comprising from 5 to 35 parts by weight urea, 100 parts by weight calcium chloride including any water of hydration;

• and an intermediate layer of insoluble material selected from the group consisting of sulfates, phosphates, carbonates and silicates, between the calcium chloride particles and the urea coating.

Free-flowing, urea-coated calcium chloride particles comprising:

• from 5 to 35 parts by weight urea and 100 parts by weight calcium chloride including any water of hydration wherein a resin is coated over the urea coating.

Free-flowing, urea-coated calcium chloride particles comprising:

• a calcium chloride core and a urea coating wherein the urea and the calcium chloride form a urea-calcium chloride adduct layer between the core and the coating.

Free-flowing, urea-coated calcium chloride particles comprising:

• from 5 to 35 parts by weight urea and 100 parts by weight calcium chloride including any water of hydration and a layer of insoluble material selected from the group consisting of sulfates, phosphates, carbonates and silicates, the particles further comprising a particle size distribution substantially between 0.4 and 5 mm.

Free-flowing moisture resistant calcium-containing particles comprising:

• a core comprising a hygroscopic calcium-containing material containing from about 5 to about 25 percent water by weight of the core;
• an essentially calcium free soluble, nitrogen-containing coating, a hydrophobic coating over the essentially calcium free soluble coating to inhibit moisture uptake by the core;
• and a finely divided conditioning agent over the hydrophobic coating.

Free-flowing moisture resistant calcium chloride particles comprising:

• a calcium chloride core and a soluble nitrogen-containing coating wherein the soluble nitrogen-containing coating is applied to the core in molten form.