Timothy S Fitzpatrick

US Patent:

40294846, Jun 14, 1977

Filed:

Jan 21, 1976

Appl. No.:

5/651194

Inventors:

Timothy Allen Fitzpatrick - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 5300

US Classification:

55 71

Abstract:

A process for cleansing waste halides from a waste gas stream containing waste halide impurities wherein the waste gas stream is contacted with an aqueous acid mist selected from HCl, HNO. sub. 3, HBr, HF, and HI, or an aqueous halide salt mist selected from halide salts of calcium, sodium, ammonium, lithium, barium, and iron, with the provisos that the temperature of the combined gas stream and aqueous mist is about -5. degree. to 70. degree. C. , the water vapor pressure of the aqueous mist is about 0. 05-5. 0 mm Hg, and the ratio of surface area of the aqueous mist to the weight of waste halide is at least 2 square meters surface area of aqueous mist per gram of waste halide. Then the gas stream is separated from the acid and the gas stream is scrubbed with water.

US Patent:

D2965607, Jul 5, 1988

Filed:

Jun 19, 1987

Appl. No.:

7/064279

Inventors:

John B. Alexandersen - East Windsor NJ
Mark B. Clifton - Monmouth Junction NJ
Timothy E. Fitzpatrick - Mercerville NJ
Melvin W. Fulp - Winston Salem NC
Steven A. Gahr - Yardley PA
Efthimios G. Harokopos - Plainsboro NJ
Ivan Pawlenko - Levittown PA
Richard A. Roll - Trenton NJ

Assignee:

American Telephone and Telegraph Company - New York NY

US Classification:

D15199