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Harold B. Caldwell Patents |
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Inventor: Caldwell; Harold B.
Address: Sarasota, FL
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4065266 |
Apparatus for manufacturing phosphoric acid |
December 27, 1977 |
| Apparatus for manufacture of wet process phosphoric acid wherein phosphate rock and sulfuric acid are separately added to a combination reactor and cooler unit at a rate of addition such that the increase in calcium content and sulfate content in the slurry contained in the unit are smal |
| 3939248 |
Process and apparatus for manufacturing phosphoric acid |
February 17, 1976 |
| A method and apparatus for manufacture of wet process phosphoric acid wherein phosphate rock and sulfuric acid are separately added to a combination reactor and cooler unit at a rate of addition such that the increase in calcium content and sulfate content in the slurry contained in |
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