Fluid purification

Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...

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4221863, 422905, 422 24, 261DIG42, 250431, 250436, 250437, 250438, 210748, 210763, 2105101, 20415744, 20415715, 204903, B01J 110, B01J 1908, G01N 2101, G01N 2151

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active

048927120

ABSTRACT:
A purifier for water or air removes, reduces or detoxifies organic pollutants therefrom by causing the fluid to contact a matrix having surfaces with which a fixed anatase (TiO.sub.2) or other photoreactive metal semiconductor material is bonded, in the presence of light of a wavelength that will activate the material.

REFERENCES:
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patent: 3846072 (1974-11-01), Patterson
patent: 4346131 (1982-08-01), Yoldas
patent: 4446236 (1984-05-01), Clyde
patent: 4615799 (1986-10-01), Mortensen
patent: 4694179 (1987-09-01), Lew et al.
"Photooxidation of Organic Impurities in Water Using Thin Films of Titanium Dioxide" by Ralph W. Matthews-published in J. Phys. Chem. 1987, 91, 3328-3333.
"Heterogeneous Photocatalysis: Degradation of Dilute Solutions of Dichloromethane (CH.sub.2 Cl.sub.2), Chloroform (CHCl.sub.3), and Carbon Tetrachloride (CCl.sub.4) with Illuminated TiO.sub.2 Photocatalysts" by Chen-Yung Hsiao, et al-Journal of Catalysis 82, 1983, pp. 418-423.
"Photocatalysis Over TiO.sub.2 Supported on a Glass Substrate" by Nick Serpone, et al-Solar Energy Materials 14 (1986) pp. 121-127, Elsevier Science publishers B.V.-North-Holland Physics Publishing Divisions, Amsterdam.
"Integrated Chemical Systems: Photocatalysis at TiO.sub.2 Incorporated into Nafion and Clay" by Fu-Ren F. Fan, et al-The Journal of Physical Chemistry 1985, 89, 4418-4420.
"Use of Sol-Gel Thin Films in Solar Energy Applications" by R. B. Pettit, et al-published in Solar Energy Materials 14 (1986) 269-287.
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"Oxide Layers Deposited from Organic Solutions" by H. Schroeder.
"Hydrolysis of Titanium Alkoxide and Effects of Hydrolytic Polycondensation Parameters" by B. E. Yoldas-published in the Journal of Materials Science 21 (1986) 1087-1092.
"Photooxidation of Organic Impurities in Water Using Thin Films of Titanium Dioxide" by Ralph W. Matthews-published in the Journal of Physical Chemistry 1987, 91, 3328-3333.
"Solar-Electric Water Purification Using Photocatalytic Oxidation with TiOhd 2 as a Stationary Phase" by Ralph W. Matthews-published in Solar Energy vol. 38, No. 6, pp. 405-413, 1987.
"Photodechlorination of PCB's in the Presence of Titanium Dioxide in Aqueous Suspensions" by John H. Carey, et al-Bulletin of Environmental Contamination & Toxicology, vol. 16, No. 6, pp. 697-701, 1976 Springer-Verlag New York Inc.
"Hydroxylation Reactions Induced by Near-Ultraviolet Photolysis of Aqueous Titanium Dioxide Suspensions" by Ralph W. Matthews.
J. Chem. Soc. Faraday Trans. 1, 1984, 80, pp. 457-471.
"Carbon Dioxide Formation from Organic Solutes in Aqueous Suspensions of Ultraviolet-Irradiated TiO.sub.2, Effect of Solute Concentrations" by Ralph W. Matthews Aust. J. Chem., 1987, 40,001-000, pp. 1-9.

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