High analysis liquid fertilizers
AssigneeStoller Enterprises, Inc.
InventorsJerry H. Stoller, Harold A. Hartung
Life of this patent
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Abstract
High analysis liquid fertilizers comprising the reaction product of urea and phosphoric acid having a pH between 1.5 and 4 and optionally containing the reaction product of urea and sulfuric acid, various trace elements including those normally found as contaminants in wet process phosphoric acid, potash and gelling agents, said fertilizers being further characterized as having total analysis of N, P.sub.2 O.sub.5 and K.sub.2 O of at least 25 weight percent and preferably 30 weight percent or greater.
Claims31
A high analysis, non-ammoniated, liquid fertilizer which is the reaction product of urea and phosphoric acid or a mixture of phosphoric acid and sulfuric acid, and characterized as a clear liquid, which does not salt out at 0.degree. C., has a pH of less than 4 and has an analysis of N and P.sub.2 O.sub.5 and K.sub.2 O totaling at least 25 weight percent of the fertilizer in the ranges of >0 to 30 wt. % N, 5 to 50 wt. % P.sub.2 O.sub.5 and 0 to 12 wt. % K.sub.2 O.
A process for preparing high analysis, non-ammoniated, liquid fertilizer composition consisting essentially of:
- (1) admixing:
- urea and wet process field grade phosphoric acid in a mole ratio of about 0.5 mole up to about 2 moles of urea per mole of acid present or
- urea and a mixture of phosphoric acid and from 5 to 80 weight percent sulfuric acid based on said phosphoric acid in a mole ratio of about 0.1 mole up to about 3 moles to urea per mole of acid present
- (2) reacting said urea and said acid exothermally and without external heating in the presence of less water than required to form aqueous solutions of the reaction products, and
- (3) recovering a liquid product having a total of N, P.sub.2 O.sub.5 and K.sub.2 O analysis of at least 25 weight % of said product.
A high analysis, non-ammoniated, liquid fertilizer which is the reaction product of urea and phosphoric acid or a mixture of phosphoric acid and sulfuric acid, and characterized as a clear, liquid which does not salt out at 0.degree. C., has a pH of less than 4 and has an analysis of N and P.sub.2 O.sub.5 and K.sub.2 O totaling at least 25 weight percent of the fertilizer in the ranges of >0 to 30 wt. % N, 5 to 50 wt. % P.sub.2 O.sub.5 and 0 to 12 wt. % K.sub.2 O, prepared by the process consisting essentially of:
- (1) admixing:
- urea and wet process field grade phosphoric acid in a mole ratio of about 0.5 mole up to about 2 moles of urea per mole of acid present or
- urea and a mixture of phosphoric acid and from 5 to 80 weight percent sulfuric acid based on said phosphoric acid in a mole ratio of about 0.1 mole up to about 3 moles of urea per mole of acid present
- (2) reacting said urea and said acid exothermally and without external heating in the presence of less water than required to form aqueous solutions of the reaction products, and
- (3) recovering a liquid product having a total of N, P.sub.2 O.sub.5 and K.sub.2 O analysis of at least 25 weight % of said product.
A process for preparing high analysis, non-ammoniated, liquid fertilizer composition consisting essentially of:
- (1) admixing:
- 2 urea and wet process phosphoric acid in a mole ratio of at least about 1 mole up to about 2 moles of urea per mole of acid present or
- urea and a mixture of phosphoric acid and from 5 to 80 weight percent sulfuric acid based on said phosphoric acid in a mole ratio of about 0.1 mole up to about 3 moles to urea per mole of acid present
- (2) reacting said urea and said acid exothermally and without external heating in the presence of less water than required to form aqueous solutions of the reaction products, and
- (3) recovering a liquid product having a total of N, P.sub.2 O.sub.5 and K.sub.2 O analysis of at least 25 weight % of said product.
Dependencies are inferred from the claim text.