3392.     THOMAS, P. R., DOWN, L., AND LEVIN, H.  Determination of Carbon Monoxide in Hydrocarbon Gases Containing Olefins.  Anal. Chem., vol. 21, No. 12, 1949, pp. 1476-1480.

        Studies of hydrocarbon synthesis and catalytic cracking make it necessary to determine CO in gases containing large amounts of olefins.  All hydrocarbons except CH4 are removed rapidly by condensation in liquid N2 from which the uncondensed gases -- CO, H2, N2, O2 and CH4 -- are removed to Toepler pump.  Orsat apparatus is used to remove O2 from this mixture and to determine CO.  The major part of the CO is absorbed in acid cuprous chloride and the remainder in cuprous sulfate-2-naphthol.  CO is determined in concentrations from 0.1-100% with an average error of less than 0.5% of the CO in the samples containing 10% CO.  The accuracy is somewhat less for lower concentrations.  The total time required for the determination is less than 1 hr.

        THOMAS, R. W.  See abs. 2489.

        THOMAS, V.  See abs. 299, 300.