Active carbon-supported aluminium copper(I) chloride (AlCuCl4) is prepared by mixing active carbon with toluene solution of AlCuCl4, followed by the removal of the liquid phase at 6 mmHg, 100 °C. The active carbon-supported AlCuCl4 rapidly adsorbs carbon monoxide (CO) at 20 °C under 1 atm from 9:1 CO–N2 mixture and the equilibrium molar ratio of adsorbed CO to AlCuCl4 is 1.03. Adsorbed CO is desorbed either by reducing pressure or by elevating temperature. In the second adsorption, which is carried out after the desorption at 6 mmHg, 20 °C for 10 min, the molar ratio of adsorbed CO to AlCuCl4 is 0.51. The molar ratios are constant at 0.51 in the third and later adsorptions. The CO adsorbing ability of the active carbon-supported AlCuCl4 remains virtually unchanged on repeated contacts with nitrogen gas containing 9000 ppm of water.
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Hirai et al. (1986) studied this question.