John Rembrandt Hobaugh
Engineers at Utah Pl, Denver, CO
License number
Colorado 4444
Issued Date
Jul 8, 1961
Renew Date
Feb 23, 1985
Expiration Date
Feb 23, 1985
Type
Professional Engineer
Address
Address
5443 E Utah Pl, Denver, CO 80222
Professional information
Froth Flotation Process
US Patent:
3973734, Aug 10, 1976
Filed:
Apr 22, 1974
Appl. No.:
5/462725
Inventors:
Edward C. Rosar - Lakewood CO
John R. Hobaugh - Denver CO
Vuko M. Lepetic - Lakewood CO
John R. Hobaugh - Denver CO
Vuko M. Lepetic - Lakewood CO
Assignee:
Industrial Resources, Inc. - Chicago IL
International Classification:
B02C 2100
US Classification:
241 20
Abstract:
Froth Flotation method of separation of sodium compounds, principally nahcolite, dawsonite, trona, related authigenic sodium ores, and corresponding sodium compounds including sodium carbonate and sodium bicarboate, from kerogen-type organics-containing rock, by use of sodium carbonate and/or sodium bicarbonate-containing brines having a basic pH ranging above about 7. 0, preferably 8. 0 - 12. 0, and recovering a sodium compounds-rich fraction as a non-float portion, and an organics-rich fraction as a float portion. Frothers, froth control agents and collection agents may be used separately or in combination. Single or multiple-stage flotation, with cleaning, conditioning, scavenging, reflotation, and combining of products may be used. Feed ore and products may be screened to upgrade the head or product assay. By this method, raw or retorted oil shale may be separated from sodium minerals or compounds contained therein.