Compositions: coating or plastic – Coating or plastic compositions – Molds and mold coating compositions
Patent
1997-05-07
1998-09-22
Marcheschi, Michael
Compositions: coating or plastic
Coating or plastic compositions
Molds and mold coating compositions
164 41, 164456, 164 47, 164131, 164138, B22C 100, B22C 900, B22C 902
Patent
active
058109188
ABSTRACT:
A method of maintaining foundry molding sand and/or a foundry core sand compositions relatively free of benzene and/or total quantity of volatile organic compounds (total VOCs) at 1800.degree. F. and 1 atmosphere pressure by periodically analyzing the sand mold and/or sand core compositions for one or more aromatic hydrocarbons, such as benzene and/or other single ring aromatic hydrocarbons, such as toluene, and/or extractable organic matter (EOMs). If the sand composition is determined by analysis, e.g., by volatilizing the hydrocarbons and passing the volatilized material through a gas chromatograph, or by thermogravimetric analysis, to contain more than a desired amount of aromatic hydrocarbons, e.g., more than about 0.1 mg/g; and/or more than a desired amount of total VOCs, or extractable organic matter (EOM), e.g., more than about 0.5 mg/g total VOCs at 1800.degree. F., the sand composition then can be treated by sand replacement; for hydrocarbon removal or hydrocarbon oxidation, such as by solvent extraction, or oxidation, e.g., by contact with O.sub.3 in water solution; or by adding activated carbon or generating activated carbon in-situ with carbon, graphite acid as humic-containing ore. The treated sand then is reused to form a foundry sand mold and/or sand core for reduced emissions.
REFERENCES:
patent: 2830342 (1958-04-01), Meyers et al.
patent: 2830913 (1958-04-01), Meyers et al.
patent: 3023113 (1962-02-01), Barlow
patent: 3445251 (1969-05-01), Nevins
patent: 3832191 (1974-08-01), Bolding et al.
patent: 3938578 (1976-02-01), Epstein et al.
patent: 3941868 (1976-03-01), Riester
patent: 4002722 (1977-01-01), Suzuki et al.
patent: 4034794 (1977-07-01), Gebler et al.
patent: 4035157 (1977-07-01), Riester
patent: 4167398 (1979-09-01), Hughes et al.
patent: 4505750 (1985-03-01), Cowan
patent: 4615712 (1986-10-01), Wen
patent: 4946647 (1990-08-01), Rohatgi et al.
patent: 5026416 (1991-06-01), Alexander
patent: 5034045 (1991-07-01), Alexander
patent: 5094289 (1992-03-01), Gentry
patent: 5215143 (1993-06-01), Gentry
patent: 5221290 (1993-06-01), Dell
patent: 5275114 (1994-01-01), Hughes
Amcol International Corporation
Marcheschi Michael
LandOfFree
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