Abstract
The disproportionation reaction of rosin and tall oil with various kinds of metal iodides has been studied and iron (II) iodide was found to be an effective catalyst for the reaction. Compared with the reaction using iodine as the catalyst, the reaction rate of abietic acid was higher, other reactions than disproportionation were depressed, and dehydroabietic acid was obtained in a higher yield. The products obtained showed higher softening points.
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