Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iib metal
Patent
1994-04-22
1995-12-26
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iib metal
423109, 423544, 75742, C22B 4300, C01G 1300, C01B 1796
Patent
active
054785405
ABSTRACT:
Heavy metal values can be removed and separated from a substance having a suitable amount of the heavy metal values by contacting the substance with a fluid containing sulfur trioxide to prepare a corresponding heavy metal sulfate, which is followed by leaching the sulfate therefrom and separating the leached sulfate. For example, mercury metal, oxide or sulfide, or methyl mercury, such as can be found in used fluorescent lamps and household batteries, in industrial flue sands, fly ash, contaminated soils, etc., can be removed by contact of crushed lamps or batteries, samples of the flue sands, fly ash, or contaminated soils, etc., with a mixture of sulfur trioxide in air to form mercuric sulfate, which is leached with a suitable leaching agent such as water, aqueous hydrochloric acid, hot dilute sulfuric acid, or concentrated sodium chloride solution, and sequestered by use of an ion exchange resin or precipitated as sulfides for further isolation of mercury value.
REFERENCES:
patent: 1896876 (1933-02-01), Wildman
patent: 2289966 (1942-07-01), Herstein
patent: 2846305 (1958-08-01), Ashley et al.
patent: 3932149 (1976-01-01), Melkersson
patent: 4503017 (1985-03-01), Gadd et al.
patent: 4902493 (1990-02-01), Walles et al.
patent: 5013358 (1991-05-01), Ball et al.
patent: 5244492 (1993-09-01), Cyr
Translation of German patent 2,102,576, Jul. 1971.
"Ecolux 2000" Brochure, Ekoteho Oy, Pieksamaki, Finaldn, no date.
Hawley (Ed.) "The Condensed Chemical Dictionary," 10th Edition, New York, Van Nostrand Reinhold Company (1981), p. 740, no month.
California Environmental Protection Agency, Dept. of Toxic Substancea Control, Pollution Prevention, Public and Regulatory Assistance Program, "Lighting Wastes," Nov., 1992.
Freedman, The Detroit News, "Science panel recommends mercury safeguards," May 16, 1993, Metro.
Hansen & Fisher, Environmental Science and Technology, "Elemental Distribution in Coal Fly Ash Particles," 14(9):1111-7, Sep., 1980.
Henze, The Midland Daily News, "Mercury contamination concerns . . . ," Sep. 2, 1992.
Kulik, World Wastes, "Germany Faces Fluorescent Lamp Disposal Problem," ca. Jan., 1993, p. 10812.
Paulson, The Ann Arbor News, "Scientists: People need regulator mercury checks," May 13, 1993.
Product Report, Chemical & Engineering News, "Pigment producers anticipate heavy metal concerns," Oct. 12, 1992, ca. pp. 72-74.
Sundberg, Recycling, "Mercury recovery from mercurial waste," p. 85 et seq., no date.
United States Environmental Protection Agency, Waste Management Division, Region 1 (HER-CANG) Boston, Mass., "Report of National Technical Forum on Source Reduction of Heavy Metals in Municipal Solid Waste," EPA 901-93-001, Sep., 1993.
Walitsky & Bleasby, Lighting Management & Maintenance, "Classification and Disposal of Lamps Containing Mercury: Tackling the Issue," Aug., 1992, pp. 10-11.
Watson, Resonance Recycling, "Fluorescent lamps--a bright new recycle," Mar., 1992, ca. p. 70 to p. 78.
Windholz et al. (Eds.), The Merck Index, Tenth Edition, Merck & Co., Inc., Rahway, N.J., USA (1983) p. 841, no month.
Castellan, "Physical Chemistry," Second Edition, Addison-Wesley Publishing Company, Inc., Reading, Mass., 1971, p. 732, no month.
Cotton & Wilkinson, "Advanced Inorganic Chemistry," Third Edition, Interscience Publishers, New York, 1972, p. 504, no month.
Cotton & Wilkinson, "Basic Inorganic Chemistry," John Wiley & Sons, Inc., New York, 1976, p. 343, no month.
Dickerson, Gray & Haught, Jr., "Chemical Principles," W. A. Benjamin, Inc., New York, 1970, p. 197, no month.
Grant & Grant, "Grant & Hackh's Chemical Dictionary," Fifth Edition, McGraw-Hill Book Company, New York, 1987, no month, pp. 277 & 398.
Hawley (Ed.), "The Condensed Chemical Dictionary," Tenth Edition, Van Nostrand Reinhold Company, New York, 1981, no month pp. 252, 657 & 659-660.
Samdani (Ed.), "Chementator," Chemical Engineering, Apr. 1995, p. 17.
Barrett, "Mercury `scare` not over," Port Huron, Mich., Times Herald, Sun., Apr. 2, 1995, pp. 1A & 4A.
Barrett, "Mercury in our waterways makes eating fish a worry," Port Huron, Mich., Times Herald, Sun., Apr. 2, 1995, p. 4A.
Mulford Luis C.
Walles Wilhelm E.
Bos Steven
Rudy Christopher John
LandOfFree
Removal of mercury heavy metal values employing sulfur trioxide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Removal of mercury heavy metal values employing sulfur trioxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removal of mercury heavy metal values employing sulfur trioxide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1367228