Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1994-08-03
1995-08-22
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204131, 210663, 210671, 210680, 210694, C02F 1461
Patent
active
054437008
ABSTRACT:
A method for treating waster water containing oil composed of esters, which makes reactivation of spent adsorbent possible or unnecessary, and facilitates treatment of waste adsorbent. In order to realize the above method, oil composed of esters is adsorbed into an electroconductive adsorbent from the waste water, and is converted to water soluble materials by electrolytic hydrolysis using the adsorbent as a part of cathode for separating from and reactivating the adsorbent, or adsorbing step and reactivating step are performed concurrently. In accordance with the present invention, reactivation of spent adsorbent becomes possible and an amount of generated waste decreases remarkably, and generated waste adsorbent hitherto can be readily incinerated because of eliminating adsorbed oil. Secondary waste is not generated because no chemicals are used other than electric power.
REFERENCES:
patent: 4040938 (1977-08-01), Robertson
patent: 4330387 (1982-05-01), Astruc et al.
Kagaku Kougaku Benran (Chemical Engineering Handbook), 4th Ed., Maruzen Co. Tokyo, 1978, Chapter 11 (no month).
Y. Nojima et al, "Operational Experience in the Low Level Liquid Waste Treatment at Tokai Reprocessing Plant", Proceedings of Fuel Reprocessing and Waste Management, Aug. 26-29, 1984, vol. 1, pp. 505-515.
W. W. Schulz, and J. D. Navratil, "Science and Technology of Tributyl Phosphate", vol. 1, Chap. 5, CRC Press Inc. 1984 (no month).
Hirose Yasuo
Okada Kikuo
Hitachi , Ltd.
Niebling John
Phasge Arun
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