Process for the production of phospho-nitrogenous products and products thus obtained
US5409516A · kind A · utility
7Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Sep 15, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Sep 15, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S426/807
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The method relates to the production of phospho-nitrogenous products soluble in neutral ammonium citrate and wherein free urea does not remain in significant amount in such products. Most of the free urea is involved in a ureic combination of calcium sulphate. Tricalcic phosphate is reacted with a reactant obtained by mixing sulfuric acid and urea. The process is particularly useful for the manufacture of fertilizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.