Manufacture of urea sulfur fertilizer

Details Manufacture of urea sulfur fertilizer Manufacture of urea sulfur fertilizer

C - Chemistry, Metallurgy

05

C

71/23

C05C 9/00 (2006.01)

Patent

CA 1144771

ABSTRACT OF THE DISCLOSURE A process is disclosed for the production of a urea sulfur fertilizer by mixing urea and molten sulfur to obtain a molten mixture and solidifying the molten mixture to obtain a homogeneous, solid, particulate urea sulfur fertilizer wherein the sulfur has particle sizes of smaller than about 100 micron. The process comprises passing molten urea and molten sulfur through a mixing device at a temperature above the melting points to produce a finely divided sulfur dispersed in urea with the molten sulfur added in amounts sufficient to produce said urea sulfur fertilizer, maintaining a pressure drop across said mixing device of at least about 200 kPa to form a homogenized melt of urea sulfur, and solidifying said homogenized melt by prilling or agglomeration.

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