Manufacture of urea sulfur fertilizer

  • US 4,330,319 A
  • Filed: 01/05/1981
  • Issued: 05/18/1982
  • Est. Priority Date: 12/24/1980
  • Status: Expired due to Term
First Claim
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1. A process 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 particulate urea sulfur fertilizer comprising passing the molten urea and the molten sulfur through a mixing device at a temperature above the melting points of the molten urea and the molten sulfur 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 to obtain a homogeneous, solid, particulate urea sulfur fertilizer wherein the sulfur has particle sizes of smaller than about 100 micron.

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