Sulfonic-type cation-exchange resins are excellent desiccants for drying organic liquids. The use of Dowex 50W resin for drying has been extensively investigated using ethanol and 1 , I ,1 -trichloroethane as examples of relatively polar and nonpolar materials, respectively. O f the resin variables studied, the ionic form is the most important.It will dry nonpolar organic liquids to less than 1 p.p.m. of water and exhibit high capacities. It can be regenerated at the relatively low temperature of 240' to 280" F. The influence of water concentration in the feed, cross linking, flow rate, and temperature on capacity was studied.The potassium form of Dowex 50W-X8 resin (20to 50-mesh) was the best tested.
FURTHER studies on what was believedl by analogy with the carbon disulphide and carbonyl sulphide complexes, e.g., (Ph3P)2PtCS2,1~2 to be a carbon dioxide complex have shown that, in fact, in the complete absence of oxygen (or air), tris(triphenylphosphine)platinum(O) in diethyl ether or benzene solution does not react with carbon dioxide at 25'. On admission of oxygen, a rapid reaction occurs and white to pale yellow crystals of a hitherto unknown type of carbonate-complex, (Ph,P),PtCO, are precipitated according to the stoicheiometric equation :
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.