The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1987
Filed:
Sep. 11, 1985
Applicant:
Inventors:
Assignee:
Norsk Hydro, a.s., Oslo, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C05D / ;
U.S. Cl.
CPC ...
71 32 ; 71 60 ; 71 62 ; 71 63 ;
Abstract
The present invention relates to NPK-fertilizer manufactured during application of KCl and/or K.sub.2 SO.sub.4 as potassium source and which also contains magnesium in an amount of 0.2-3.0% calculated as MgO and added in the product as MgO, and method for manufacture of this product. The special features of the method is that to an evaporated nitrogen, phosphorous solution 0.2-3.0% reactive MgO and potassium salts are added before prilling or before/during granulation. MgO is preferably added as lightly calcined MgO having an average particle size of 0.2-3.0 mm, and is added in the mixer just before the prilling means. The new product has reduced tendency to swelling and caking.