SummaryA process for dehydrating castor oil continuously has been presented. The method consists essentially of exposing the oil in a thin film under the vacuum to temperatures between 310° and 350°C. for short periods of time in the presence of a dilute sulfuric acid catalyst. The relationship between various operational conditions and the physical constants of the oil produced has been determined. In addition, the oils were compared with several representative commercial oils.

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tion of residual oil from spent catalyst. A variety of solvents were used, including aliphatic and aromatic hydrocarbons, alcohols, and chlorinated solvents. The color of the extracted oil depended on the nature of the solvent used. Thus, Skellysolve F yielded a light yellow extracted oil, and chlorinated solvents gave a deep red-orange extract owing to more complete removal of coloring matter adsorbed during the isomerizations. The pale, recovered oil could be incorporated into the conjugated oil, whereas a dark, extracted oil was regarded as a by-product.The extracted catalyst was pyrophoric. The nickel contained in the oil-free catalyst was extractable and recoverable by any suitable method. In laboratory experiments extraction with nitric acid resulted in recovery of 90% of the original nickel.

Summary Anthraquinone and its derivatives have been found to be effective catalysts for the isomerization of drying and semi‐drying oils to conjugated forms. A possible mechanism to account for the catalytic activity of these materials has been proposed. Possible commerical application of the isomerization of oils with anthraquinone was briefly discussed.

SummaryData on the products obtained on polymerizing styrene in the presence of various methyl esters of fatty acid have been presented. These data show that no copolymerization between the esters and styrene occurs and that homogeneity of some of the reaction products cannot be considered as proof for interpolymerization.