Process for recovering metal values by dissolving them in a...

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vb metal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C423S018000, C423S041000, C423S098000

Reexamination Certificate

active

06843970

ABSTRACT:
A process for recovering metal values from a metal containing material including the metal values comprising digesting the metal containing material in a sulfuric acid solution comprising sulfuric acid, a reducing agent, and a carbon source, heating the digestion mixture and separating the resulting solution from the remaining solids. The sulfuric acid solution may additionally include hydrofluoric acid (HF) as a source of fluoride ion.

REFERENCES:
patent: 2767047 (1956-10-01), Wilhelm et al.
patent: 2953453 (1960-09-01), Foos
patent: 2962372 (1960-11-01), Foos et al.
patent: 3117833 (1964-01-01), Pierret
patent: 3300297 (1967-01-01), Field
patent: 3658511 (1972-04-01), Gustison
patent: 3712939 (1973-01-01), Capps et al.
patent: 3972710 (1976-08-01), Meyer
patent: 4155982 (1979-05-01), Hunkin et al.
patent: 4164417 (1979-08-01), Gustison
patent: 4233278 (1980-11-01), Korchnak
patent: 4234555 (1980-11-01), Pulley et al.
patent: 4278640 (1981-07-01), Allen et al.
patent: 4293528 (1981-10-01), Paul
patent: 4302243 (1981-11-01), Tamaru et al.
patent: 4309389 (1982-01-01), Meyer
patent: 4320093 (1982-03-01), Volesky et al.
patent: 4332777 (1982-06-01), Pazdej
patent: 4412861 (1983-11-01), Kreuzmann
patent: 4446115 (1984-05-01), Endo et al.
patent: 4446116 (1984-05-01), Krismer et al.
patent: 4451438 (1984-05-01), Floeter et al.
patent: 4477416 (1984-10-01), Goddard
patent: 4536034 (1985-08-01), Otto, Jr. et al.
patent: 4654200 (1987-03-01), Nirdosh et al.
patent: 4663130 (1987-05-01), Bergman et al.
patent: 4673554 (1987-06-01), Niwa et al.
patent: 4695290 (1987-09-01), Kindig et al.
patent: 4718996 (1988-01-01), Vanderpool et al.
patent: 4743271 (1988-05-01), Kindig et al.
patent: 4753033 (1988-06-01), Kindig
patent: 4778663 (1988-10-01), Rickelton
patent: 4808384 (1989-02-01), Vanderpool et al.
patent: 4923507 (1990-05-01), Silva, Filho
patent: 5023059 (1991-06-01), Bielecki et al.
patent: 5084253 (1992-01-01), Pollock et al.
patent: 5209910 (1993-05-01), Bludssus et al.
patent: 5232490 (1993-08-01), Bender et al.
patent: 5273725 (1993-12-01), Carlson
patent: 5384105 (1995-01-01), Carlson
patent: 5437848 (1995-08-01), Hard
patent: 5492680 (1996-02-01), Odekirk
patent: 770058 (1967-10-01), None
patent: 0 041 459 (1981-06-01), None
patent: 2 438 623 (1980-01-01), None
Solvent Extraction Principles and Applications to Process Metallurgy, Part II., no date.
Radioactive Waste Disposal in the Shiprock-Type Uranium Milling Flowsheet by K.E. Tame, E.G. Valdez, and J.B. Rosenbaum, no date.
Radium Removal from Uranium Ores and Mill Tailings by S.R. Borrowman and P.T. Brooks, no date.
The Purification of Inorganic Acids by the Amine Liquid Ion Exchange Process by D.W. Agers, J.E. House, J.L. Drobnick and C.J. Lewis, no date.
Scandium Recovery From a Tantalum Waste Residue: A Status Report by D.D. Harbuck and G.R. Palmer, U.S. Bureau of Mines, 1991, no month.
Evaluation of Scandium Oxide Production from Tantalum Processing Waste, Aug., 1993, edited by G. Kyle Green.
Scandium Saves Aluminum, Rare-earth Information Center Insight, Ames Laboratory Institute for Physical Research and Technology, vol. 6, No. 4, Apr. 1, 1993.
Co-extraction of uranium and thorium, by G.M. Ritcey and B.H. Lucas, Apr., 1972, Journal of Metals, pp. 39-44.
PCT Application No. WO 90/02823, published Mar. 22, 1990.
PCT Application No. WO 95/13985, published May 26, 1995.
PCT Int'l Appln. No. PCT/US97/04013 Search Report mailed Jul. 16, 1997.
PCT Application No. WO/94/01190, published Jan. 20, 1994.
PCT Int'l Appln. No. PCT/US97/04089 Search Report mailed Aug. 12, 1997.
PCT Int'l Appln. No. PCT/US97/04088 Search Report mailed Aug. 5, 1997.
“Extractive metallurgy of niobium, tantalum, and vanadium,” by C.K. Gupta, pp. 405-444, 1984, no month, International metals Reviews, vol. 29(6).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for recovering metal values by dissolving them in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for recovering metal values by dissolving them in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovering metal values by dissolving them in a... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3422637

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.