| Patent Number |
Title Of Patent |
Date Issued |
| T996001 |
Production of ammonium potassium polyphosphates |
July 1, 1980 |
| Embodiment No. 1. Urea phosphate prepared from wet-process phosphoric acid is heated with monopotassium orthophosphate in a mole ratio of 0.25 to 4.0 at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The a |
| H676 |
Production of urea fluorosilicate |
September 5, 1989 |
| A process for producing urea fluorosilicate, [(NH.sub.2).sub.2 CO].sub.4 .multidot.H.sub.2 SiF.sub.6, a composition eminently suitable for use as a fungicide in the prevention and control of wheat stem rust. The method involves mixing urea and fluorosilicic acid derived from by-product |
| 4308048 |
Production of ammonium potassium polyphosphates |
December 29, 1981 |
| Embodiment No. 1. Urea phosphate prepared from wet-process phosphoric acid is heated with monopotassium orthophosphate in a mole ratio of 0.25 to 4.0 at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The a |
| 4239739 |
Manufacture of purified diammonium phosphate |
December 16, 1980 |
| Purified diammonium phosphate is produced by neutralizing relatively pure melamine orthophosphate, prepared from wet-process phosphoric acid, with ammonia in a hot solution of diammonium phosphate to give a slurry of melamine in concentrated diammonium phosphate solution. The liberated |
| 4169882 |
Purification of phosphoric acid with oxalic acid |
October 2, 1979 |
| Impure wet-process phosphoric acid is treated with urea by known processes to produce relatively pure urea phosphate which is then treated with oxalic acid to give solid urea oxalate and purified phosphoric acid product. The urea oxalate is either treated with ammonia to give urea and |
| 4017589 |
Production of ammonium polyphosphates from melamine phosphates |
April 12, 1977 |
| Ammonium polyphosphates are prepared by a process which comprises heating melamine orthophosphate prepared from impure wet-process phosphoric acid in a stream of gaseous ammonia at a temperature between 150.degree. C and 210.degree. C to produce a mixture of melamine and relatively pure |
