Liquid purification or separation – With means to add treating material – Directly applied to separator
Reexamination Certificate
2005-04-01
2008-08-26
Lithgow, Thomas M (Department: 1797)
Liquid purification or separation
With means to add treating material
Directly applied to separator
C210S221100, C210S097000, C210S109000, C210S124000, C096S217000
Reexamination Certificate
active
07416661
ABSTRACT:
A mechanical vessel may effectively and simultaneously displace a first undesired gas from within water with a second desired gas, and remove at least one alkaline species and oily matter from the water. The vessel raises the pH of the water and reduces the lime requirement for subsequent lime softening. The vessel receives the water containing the first gas and passes the water through a series of gasification chambers. Each gasification chamber may have a mechanism that ingests and mixes a second gas into the water thereby physically displacing at least a portion of the first gas into a vapor space at the top of each gasification chamber from which it is subsequently removed. There is an absence of communication between the vapor spaces of adjacent chambers. An acid is added to remove the alkaline species, where the first gas is an optional by-product that is also removed.
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Patent Abstracts of Japan, vol. 018, No. 233 (C-1195), Apr. 28, 1994 & JP 06 023349 A (Japan Organo Co. Ltd.), Feb. 1, 1994, Abstract.
S. Movafaghian, et al., “Pilot Testing of a New Generation of Induced Gas Flotation Equipment,” SPE Production & Facilities, Feb. 2004, pp. 9-13.
Chen James C. T.
Movafaghian Shaya
Lithgow Thomas M
Madan Mossman & Sriram PC
Petreco International Inc.
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