Title: Method for producing fertilizer granules containing urea and ammounium sulphate
Application Number: 86106555 Application Date: 1986.10.16
Publication Number: 1010383 Publication Date: 1987.04.15
Approval Pub. Date: 1991.11.13 Granted Pub. Date: 1991.11.13
International Classifi-cation: C05C9/00;C05C13/00
Applicant(s) Name: Nederlands Stikstof Maatschaffij B.V. Address:
Inventor(s) Name: Luc Albert Vanmarcke;Walter Edmond Mathilde Cardon
Attorney & Agent: HUANG JIAWEI
Abstract:
    The invention concerns a method of producing fertilizer granules containing urea and ammonium sulphate by granulating a mixture containing urea, ammonium sulphate and water, which is characterized in that the ammonium sulphate is completely dissolved in an aqueous urea solution with a urea concentration of 70-85% by weight, the resulting solution is thickened to a dry content of 92-97% by weight, with a granulation additive for the urea being added in any stage of the treatment, following which the thickened solution is granulated in a fluidized bed of urea and ammonium sulphate containing nuclei, and granulated in urea, ammonium sulphate and additive containing granules crystal.
Time: 4