JOHN W ROY JR
Engineers in Gainesville, FL
License number
Pennsylvania PE025800E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Gainesville, FL 32602
Pennsylvania
Pennsylvania
Professional information
Process Of Producing Defluorinated Product From Low Bpl Phosphate Rock
US Patent:
4423015, Dec 27, 1983
Filed:
Feb 4, 1982
Appl. No.:
6/345949
Inventors:
John W. Roy - Gainesville FL
Melvin J. Arbie - Live Oak FL
Joel P. Holmes - Lake City FL
Melvin J. Arbie - Live Oak FL
Joel P. Holmes - Lake City FL
Assignee:
Occidental Chemical Company - Los Angeles CA
International Classification:
C01F 100, C01F 500, C01F 1100
US Classification:
423167
Abstract:
In a process for producing a defluorinated product containing calcium, sodium and phosphorus, by calcination of a mixture of phosphate rock, with caustic soda, phosphoric acid and water, an improvement comprises maintaining the amount of phosphoric acid in the mixture such that the ratio of phosphorus in percentage by weight on a dry basis in said mixture-to-the phosphorus desired in percentage by weight in the calcined product is substantially equivalent to the ratio of the calcium in percentage by weight on a dry basis in the mixture-to-the calcium in percentage by weight in the calcined product. The process is especially useful where the phosphate rock has a bone phosphate of lime analysis of about 73% or less (e. g. , about 71. 5%), and also where the caustic soda is added to a mixture of phosphate rock and phosphoric acid prior to the addition of water.