Liquid purification or separation – Constituent mixture variation responsive
Patent
1995-08-03
1998-05-19
McCarthy, Neil
Liquid purification or separation
Constituent mixture variation responsive
210185, 210199, 210205, 210192, 210252, 210748, 210760, 422 24, 4221863, 250432R, 250436, C02F 132
Patent
active
057531064
ABSTRACT:
An annular throughflow photoreactor for oxidative photopurification includes an elongate radiation source surrounded by a transparent wall in the form of a spacer tube at a radial spacing of more than 3 cm, preferably in the range of more than 3 cm to 13 cm. The irradiance, i.e. the radiant flux per irradiated area is thereby reduced in comparison to a classic annular photoreactor. At unchanged irradiation power, this results in considerably increased quantum yields or extent of photoconversion in cases in which such conversion is dependent upon the square root of the irradiance, and thus enables enormous savings in radiation energy. Under such conditions, the photoconversion may be additionally increased by using low absorber concentrations and infeeding further absorber on the inside of the outer wall of the photoreactor as well as by working in the presence of gaseous oxygen at an oxygen pressure up to 3 bar and, preferentially, at pH 3. The throughflow photoreactor may comprise an annular single chamber or dual chamber photoreactor or a tank reactor having an annular array of irradiation units including the spacer tubes. A plural number of such photoreactors may be series connected.
REFERENCES:
patent: 4012321 (1977-03-01), Koubek
patent: 4255383 (1981-03-01), Schenck
patent: 4296066 (1981-10-01), Schenck
patent: 4317041 (1982-02-01), Schenck
patent: 4857204 (1989-08-01), Joklik
patent: 4968437 (1990-11-01), Noll et al.
patent: 5266215 (1993-11-01), Engelhard
patent: 5290439 (1994-03-01), Buchwald
patent: 5352359 (1994-10-01), Nagai et al.
patent: 5501801 (1996-03-01), Zhang et al.
patent: 5547590 (1996-08-01), Szabo
"Die Beseitigung organischer Substanzen aus dem Wasser durch UV-Behandlung und Wasserstoffperoxid" (Removal of Organic Compounds from Water by UV-treatment and Hydrogen Peroxide) published in the Conference vol. entitled Oxidationsverfahren in der Trinkwasseraufbereitung (Oxidation Methods in Potable Water Processing) 1978, pp. 541-577 by L. Berglind, et al.
"UV radiation sources for oxidation of pollutants in liquids and gases" Schultz, Jens Peter. Dr., 1993 pp. 1-14.
"Chemical principles behind the use of UV-radiation and/or oxidants (ozone and hydrogen peroxide) in water pollution control", Sonntag, Clemens von, et al Jun. 1993, Introductory.
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