| Patent Number |
Title Of Patent |
Date Issued |
| 4161170 |
Solar energy collection system |
July 17, 1979 |
| A solar energy collection system which employs an asymmetric gas such as ammonia in an enclosed gas space between a black-coated solar energy absorber plate and the ambient atmosphere is described. The asymmetric gas allows solar radiation to be transmitted to the absorber plate where th |
| 3965245 |
Method for preparing alkali metal orthophosphates and ammonia in a single step |
June 22, 1976 |
| A selected ammonium phosphate is reacted at elevated temperature and pressure with sodium hydroxide in a vertical column having vapor-liquid contact means to produce an alkali metal orthophosphate having a low alkali metal/P molar ratio which is substantially free of ammonia. Ammonia |
| 3957955 |
Process for preparation of sodium ammonium phosphate |
May 18, 1976 |
| A solution of sodium ammonium phosphate is prepared by reacting monoammonium phosphate with sodium carbonate in a vertical column having vapor-liquid contact means at a temperature in the range of 150.degree.F. up to the boiling point. |
| 3939254 |
Process for preparing alkali metal orthophosphates and ammonia |
February 17, 1976 |
| Aqueous monoammonium phosphate is reacted at elevated temperature with sodium carbonate in a vertical column having vapor-liquid contact means to produce an aqueous solution of sodium ammonium phosphate having a reduced carbon dioxide content. The sodium ammonium phosphate solution is tr |
