Method of isomerizing fatty acids having an isolated diene structure and disproportionating rosin acids having conjugated diene structure
AssigneeOulu Osakeyhtio
InventorTimo Pellervo Lehtinen
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Abstract
A method for isomerizing fatty acids which contain an isolated diene structure (--CH=CH--CH.sub.2 --CH=CH--) and/or disproportionating rosin acids which contain a conjugated diene structure by bringing them in contact with sulfur and/or iodine at a raised temperature, wherein the acid mixture is treated with a sulfur rate of at the most 5% by weight and/or an iodine rate of at the most 0.4% by weight at a temperature of about 180.degree.-250.degree.C.
Claims19
A method of producing a disproportioned and isomerized tall oil product, comprising heating a tall oil material containing rosin acids and fatty acids in the presence of 0.1-5% by weight sulphur and 0.01-0.4% by weight iodine at a temperature in the range 180.degree. to 250.degree.C., and subjecting the product obtained to an odor removal treatment.
A method of producing a disproportionated and isomerized tall oil product comprising heating tall oil fatty acid at a temperature of from 210.degree.-230.degree.C. in the presence of 0.1-2% by weight sulphur and 0.05-0.2% by weight iodine and subjecting the product so obtained to vacuum distillation.
A method of producing a disproportionated and isomerized tall oil product comprising successively heating a tall oil material at a temperature in the range 180.degree. to 250.degree.C. in the presence of 0.1-5% by weight sulphur and 0.01-0.4% by weight iodine, and removing the odor from the disproportionated and isomerized product.
An improved method of simultaneously isomerizing and disproportionating mixtures of fatty acids containing an isolated diene structure and rosin acids containing a conjugated diene structure by adding to the mixture sulphur and iodine, and subjecting the mixture to an elevated temperature to isomerize the fatty acids and disproportionate the rosin acids, the improvement comprising:
- adding to the mixture of most 0.4 per cent by weight iodine and at most 5 per cent by weight sulphur, and
- reacting the mixture at a temperature of from 180.degree. to 250.degree.C.
Dependencies are inferred from the claim text.