2127.     ---------------.  [LOBO, W. E.]  Production of Oxygen for Industrial Purposes.  Chem. Eng. Progress, vol. 1, 1947, pp. 21-26; Petrol Eng., vol. 18, No. 8, 1947, pp. 120, 123, 126, 128; Chem. Abs., vol. 41, 1947, p. 2213.

        Basic theory of the Kellogg low-pressure O₂ process is discussed, and a description is given of the unique temperature, unbalance system.  It is illustrated by means of a flowsheet.  Tentative costs of a plant for producing 350 tons per day of 90% O₂ should be about $5,000 per ton of product per day.  The total cost of producing O₂ in a plant of this size may be as low as $3.50 per ton, including 3% of plant cost for maintenance, 1.5% for taxes and insurance, 10% for depreciation, and all utilities and labor charges.  This is equivalent to about $0.15 per 1,000 cu. ft.