Preparation of a tall oil rosin ester with a low odor level
AssigneeArizona Chemical Company
InventorMikko Kalevi Karvo
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the preparation of a tall oil rosin ester with a low odor level, which process comprises an esterification step wherein a tall oil rosin is esterified with a polyol in order to form a product which contains a tall oil rosin ester, and evaporation is carried out on this product in order to remove odor components and other volatile components from the product, which evaporation is carried out in a short-path evaporator which has an evaporation surface and, in the vicinity of this surface, a condenser on which the vaporized components to be removed condense, whereupon a tall oil rosin ester with a low odor level is recovered from the evaporator.
Claims13
A process for the preparation of a tall oil rosin ester with a low odor level, which process comprises esterifying tall oil rosin with a polyol in one vessel to form a product which contains a tall oil rosin ester, subjecting the product obtained from the esterification to evaporation in order to remove odor components and other volatile components from the product, which evaporation is carried out in a separate short-path evaporator which has an evaporation surface, and condensing the vaporized components on a condenser in the vicinity of the evaporation surface whereupon a tall oil rosin ester having a low odor level is recovered and the ratio of the polyol used in the esterification to the rosin is approximately 0.9-1.1:1.
Dependencies are inferred from the claim text.