| Patent Number |
Title Of Patent |
Date Issued |
| T998001 |
Production of urea-ammonium polyphosphates from urea phosphate |
September 2, 1980 |
| A batch process is disclosed for the production of relatively pure urea ammonium polyphosphate liquid fertilizers from crystalline urea phosphate made from wet-process acid and urea. Initially, crystalline urea phosphate is fed to a tank where it is combined with previously produced liqu |
| T986001 |
Production of suspension fertilizers from orthophosphoric acid |
September 4, 1979 |
| an improved process for production of concentrated high-analysis nitrogen-phosphate base suspension fertilizer by ammoniation of wet-process or other orthophosphoric acids in two stages. The process improvement involves the addition of a small amount (0.1-0.5 percent) of a crystal mo |
| T973004 |
Production of urea-ammonium polyphosphates from urea phosphate |
August 1, 1978 |
| a process for the production of high-purity urea-ammonium polyphosphate fertilizers from crystalline urea orthophosphate derived from the reaction of wet-process acid and urea. Initially, urea phosphate was pyrolyzed in one stage to give molten urea-ammonium polyphosphates that contained |
| 4375980 |
Production of suspension fertilizers from orthophorphoric acid |
March 8, 1983 |
| An improved process for the production of concentrated, high-grade, nitrogen-phosphate (N--P.sub.2 O.sub.5) base suspension fertilizer from wet-process or other phosphoric acids and ammonia. The process involves addition of small proportions of fluosilicic acid during preparation of |
| 4292067 |
Production of urea-ammonium polyphosphates from urea phosphate |
September 29, 1981 |
| Crystalline urea phosphate mixed with sufficient quantities of previously produced urea-ammonium polyphosphate liquid to provide fluidity is pyrolyzed batchwise in one stage to give molten urea ammonium polyphosphate containing up to 50 percent of the phosphate as polyphosphate. Wate |
| 4217128 |
Production of urea-ammonium polyphosphates from urea phosphate |
August 12, 1980 |
| Crystalline urea phosphate is pyrolyzed in one stage to give molten urea ammonium polyphosphates that contains up to 95 percent of the phosphate as polyphosphate. These are then processed into high-analysis solid or liquid fertilizers. Addition of urea to the process to maintain a urea:b |
| 3969483 |
Removal of carbonaceous matter from ammonium polyphosphate liquids |
July 13, 1976 |
| Particulate carbonaceous matter in ammonium polyphosphate liquid made from impure wet-process phosphoric acid is removed by intimately mixing the liquid with a combination of selected organic flocculating agents and then transferring the mixture to a separation vessel where the particula |
