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:
Aug. 29, 1995
Filed:
Jul. 23, 1993
Arne Carlsen, Skien, NO;
Erik C Nygaard, Porsgrunn, NO;
Erik Syrstad, Nesbru, NO;
Tom Consoli, Lafayette, CA (US);
Norsk Hydro a.s., Oslo, NO;
Abstract
The present invention relates to a fertilizer composition comprising solution or dispersion of nutrient compounds and method for its manufacture. The solution/dispersion constitutes the discontinuous phase of a water-in-oil type (w-i-o) emulsion having a volume phase ratio, discontinuous phase: total volume in the range of 0.80-0.95. The fertilizer composition may additionally contain 0-60 weight % solid nutrient salts and/or urea. The oil or hydrocarbon component of the w-i-o emulsion comprises mineral, vegetable or animal oils, wax or mixture of these, and the emulsion comprises at least one w-i-o emulsifier. The hydrocarbon component may also contain 0.5-6 weight % of elastomer, preferably polyisobutylene. The method comprises dissolving or dispersing the nutrient compounds at a temperature of 5.degree.-15.degree. C. above the crystallization temperature of the mixture, and then adding while stirring to a mixture of emulsifier and hydrocarbon, said latter mixture having been heated to about the same temperature as the former mixture. The combined mixtures are exposed to intensified stirring for 0.3-3 minutes.