Patent ID: 8685135

Claim:
A method for synthesizing a compacted potassium chloride fertilizer product, comprising: providing a source of potassium chloride in a size distribution of between 30 mesh and 100 mesh; pulverizing a mixture of said source of potassium chloride in the presence of a binder, said binder being a grain type binder present in an amount between 0.5% to 2.5% by weight; said potassium chloride being present in a amount of not more than 8% by weight; mixing the pulverized mixture with potassium chloride in a size distribution of âˆ’14 mesh to +150 mesh; introducing a compound selected from the group consisting of sodium carbonate and sodium bicarbonate in an amount of between 0.01 to 0.5% by weight to said pulverized mixture to avoid formation of magnesium chloride hydration complexes; feeding said pulverized mixture containing said binder, said potassium chloride and said sodium carbonate or sodium bicarbonate to a counter rotating roller system and squeezing said mixture at a pressure of between 1000 and 2000 psi to homogenously distribute said binder and said potassium chloride into flakes in a roll or impact crusher; drying said flakes; and crushing said flakes to yield a product in a size distribution of between 4 mesh and 12 mesh in a yield of up to 70%.