| abstract |
Disclosed is a method of disproportionating rosin comprising heating said rosin in the presence of a dithiin derivative such, for example, as 2,5-diphenyl dithiin. The method can be carried out at about 150 DEG C. to about 300 DEG C. for about 1 hour to about 10 hours with the longer reaction time corresponding to the lower temperatures. Preferably, the process is run at about 260 DEG C. to about 300 DEG C. for about 3 to 8 hours. |