Jerry Allen Keely

US Patent:

44629737, Jul 31, 1984

Filed:

Jun 27, 1983

Appl. No.:

6/508211

Inventors:

David A. Crea - Pocatello ID
Jerry A. Keely - Pocatello ID

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

C01B 2501
C01B 2502
C01B 2504

US Classification:

423322

Abstract:

Liquid phosphorus as produced by the reduction of a phosphate ore in an electric arc furnace while of high purity contains color-causing impurities that impart to the phosphorus a black color by reflected light. Such liquid phosphorus is polished or refined to exhibit a yellow or yellow brown cast by mixing it with hot water and subjecting the mixture to intense agitation. The refined phosphorus is separated from the water phase which retains the impurities.

US Patent:

47449713, May 17, 1988

Filed:

Nov 14, 1986

Appl. No.:

6/931375

Inventors:

Gordon H. Scherbel - Pocatello ID
David A. Crea - Pocatello ID
Jerry A. Keely - Pocatello ID
Ronald L. Andersen - Pocatello ID
Byron L. Nichols - Federal Way WA

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

C01B 2501

US Classification:

423323

Abstract:

In the electric arc furnace production of elemental phosphorus, cold phossy water is segregated from hot phossy water. The cold phossy water is discharged to a lined pond wherein solids settle to form a clarified cold water which is recycled for cooling and washing purposes. The hot phossy water is passed through a lamellar settler wherein phosphorus and solids are separated as a sludge to form a clarified hot water. The clarified hot water, without requiring additional heat, is recycled for process use. Phosphorus is recovered from the sludge to reduce to a minimum the amount of phosphorus discharged with dirt from the hot phossy water to the pond.

US Patent:

45954925, Jun 17, 1986

Filed:

Nov 19, 1984

Appl. No.:

6/672524

Inventors:

David A. Crea - Pocatello ID
James A. Robertson - Levittown PA
Jerry A. Keely - Pocatello ID

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

B01D 4300

US Classification:

209 2

Abstract:

Process for recovery of elemental phosphorus from phosphorus sludge produced in a phosphorus furnace by treating the sludge in a centrifugal separator and separating a fine dirt slimes fraction from a recovered heavy fraction containing the major portion of phosphorus; treating the slimes fraction in hydrocyclones not over one inch (24. 4 mm) in diameter to separate two streams, a first phosphorus-poor stream containing particles smaller than 8-15 micrometers, and a second phosphorus-rich stream containing particles larger than 8-15 micrometers; recycling the second, phosphorus-rich stream to the centrifugal separator for phosphorus recovery, and discarding the first, phosphorus-poor stream.