| abstract |
Claim 1: The use of a lignin compound and pure sulfur to prepare a urea fertilizer with a lignin compound and pure sulfur dispersed in the fertilizer and with improved hardness. Claim 2: The use of a lignin and pure sulfur compound according to claim 1, wherein the lignin compound is lignosulfonate. Claim 8: A urea and sulfur fertilizer composition, which includes from 50 to 99% p of urea, from 1 to 25% p of pure sulfur and from 0.1 to 5% p of the lignin compound, wherein the percentages Weight are based on the weight of the fertilizer composition, and on which the lignin compound and pure sulfur are dispersed in the fertilizer. Claim 9: A fertilizer composition according to claim 8, which includes one or more additional fertilizer components chosen from potassium, phosphorus, nitrogen, boron, selenium, sodium, zinc, manganese, copper iron, molybdenum, cobalt, calcium, magnesium and your combinations |