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:
Jun. 14, 1983
Filed:
Mar. 14, 1979
Robert L Lowder, Heyburn, ID (US);
Occidental Chemical Agricultural Products, Inc., Los Angeles, CA (US);
Abstract
A 'non-pressure' liquid fertilizer containing nitrogen and sulfur can be prepared by a process comprising (a) mixing sulfuric acid in water, (b) dissolving urea into the resulting solution, and (c) adding anhydrous ammonia in an amount sufficient to bring the pH of the solution to between about 6 and 8. The resulting liquid fertilizers can typically contain in the range of about 19 to about 25% nitrogen and in the range of about 3 to 6% sulfur and remain substantially free from crystals when stored at temperatures above about 40.degree. F. A 19-0-0 liquid fertilizer containing about 3% S (as sulfate) remained crystal free when stored for about a month at about 32.degree. F. The 'non-pressure' liquid can be blended with dispersion-type fertilizers. Dispersion-type fertilizers of low phosphate content can be made by substituting phosphoric acid for some or all of the sulfuric acid.