William Ramon Frint

US Patent:

50431498, Aug 27, 1991

Filed:

Aug 29, 1990

Appl. No.:

7/574837

Inventors:

William R. Frint - Green River WY
Michael M. Bithell - Green River WY
William G. Fischer - Green River WY

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

C22B 2610

US Classification:

423206T

Abstract:

Process for disposing of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which the tailings are slurried with water or waste solutions of sodium carbonate and/or sodium bicarbonate, pumping the slurry into a well connected to an underground mined-out cavity with sufficient pressure to prevent build-up of tailings from plugging the bottom of the well opening, dispersing and settling said tailings in the cavity, removing a liquor from said cavity whose concentration of sodium carbonate and/or sodium bicarbonate has been increased and recovering such enriched liquor for use in the manufacture of sodium-containing chemicals such as soda ash.

US Patent:

52621340, Nov 16, 1993

Filed:

Feb 21, 1992

Appl. No.:

7/839641

Inventors:

William R. Frint - Green River WY
William C. Copenhafer - Yardley PA

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

C01D 712

US Classification:

423184

Abstract:

A process is described for producing sodium-based chemicals from a brine containing sodium carbonate and sodium bicarbonate by heating the brine to evaporate water and drive off carbon dioxide and obtain a solution that will crystallize sodium sesquicarbonate, cooling the solution, precipitating sodium sesquicarbonate crystals and separating a first mother liquor from the sesquicarbonate crystals. The first mother liquor is then cooled to a lower temperature to precipitate sodium carbonate decahydrate crystals, the decahydrate crystals are separated from a second mother liquor and the decahydrate crystals are recovered for use in the manufacture of sodium-containing chemicals, such as sodium carbonate monohydrate, anhydrous sodium carbonate or soda ash.

US Patent:

52386643, Aug 24, 1993

Filed:

Jun 27, 1991

Appl. No.:

7/722031

Inventors:

William R. Frint - Green River WY
Michael M. Bithell - Green River WY
William G. Fischer - Green River WY

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

C22B 2610

US Classification:

4232062

Abstract:

Process for disposing of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which the tailings are slurried with water or waste solutions of sodium carbonate and/or sodium bicarbonate, adding an alkali metal hydroxide or alkaline earth metal hydroxide in effective amounts up to about 10% by weight of the aqueous slurrying solution, pumping the slurry into a well connected to an underground mined-out cavity with sufficient pressure to prevent build-up of tailings from plugging the bottom of the well opening, dispersing and settling said tailings in the cavity, removing a liquor from said cavity whose concentration of sodium carbonate and/or sodium bicarbonate has been increased and recovering such enriched liquor for use in the manufacture of sodium-containing chemicals such as soda ash.

US Patent:

42833728, Aug 11, 1981

Filed:

Jan 29, 1980

Appl. No.:

6/116511

Inventors:

William R. Frint - Green River WY
William C. Copenhafer - Yardley PA
Michael L. Pinsky - Mt. Holly NJ

Assignee:

Intermountain Research and Devel. Corp. - Green River WY

International Classification:

C22B 2610
C01D 700
E21C 4108

US Classification:

423206T

Abstract:

A method for recovering alkali value from sodium bicarbonate-containing ore by utilizing an aqueous solvent containing ammonia. The aqueous ammonia solvent is contacted with the ore to solubilize the sodium bicarbonate-containing ore. The alkali values in the resulting solution are crystallized, preferably as sodium carbonate monohydrate or as sodium sesquicarbonate, which may be processed to recover soda ash. Aqueous ammonia solvent is preferably regenerated from the mother liquor remaining after recovery of the solids, the ammonia solvent then being employed in a cyclic method to recover additional alkali values from the ore.

US Patent:

44016352, Aug 30, 1983

Filed:

Jan 19, 1981

Appl. No.:

6/226288

Inventors:

William R. Frint - Green River WY

Assignee:

Intermountain Research and Development Corporation - Green River WY

International Classification:

C22B 2610
C01D 700
E21C 4108

US Classification:

423206T

Abstract:

A method for recovering alkali values from subterranean deposits of trona ore associated with sodium chloride by contacting the trona with an aqueous mining solution containing sodium hydroxide and subsequently utilizing the alkali values contained in the resultant salt- and sodium carbonate-containing solution. The alkali values are preferably crystallized as substantially salt-free sodium carbonate monohydrate, which is dried to recover soda ash. The mother liquor containing all of the salt is then treated to prepare a dilute sodium hydroxide solution, which may be employed as aqueous mining solution in a cyclic method to recover additional alkali values from trona.

US Patent:

51921642, Mar 9, 1993

Filed:

Jul 25, 1991

Appl. No.:

7/735586

Inventors:

William R. Frint - Green River WY
Michael M. Bithell - Green River WY
William G. Fischer - Green River WY

Assignee:

FMC Corporation - Philadelphia PA

International Classification:

B09B 300
E02D 1500

US Classification:

405128

Abstract:

Process for disposal of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which tailings are slurried with a saturated or substantially saturated solution of sodium carbonate, sodium bicarbonate and mixtures thereof, pumping said slurry into a well connected to an underground mined-out cavity with sufficient pressure to prevent the build-up of tailings from plugging the bottom of the well opening, dispersing and settling said tailings and a retained portion of the solution in the cavity, removing solution from said cavity and conveying it to the surface, recovering the removed solution for recycle and slurrying of additional tailings, and adding as make-up liquor to replace the solution retained in the cavity, a saturated or substantially saturated solution of sodium carbonate, sodium bicarbonate and mixtures thereof. The preferred solution employed in this process is purge solution which is discarded from a crystallizer circuit.