| 摘要 |
A process is disclosed for treating rosin with a zinc catalyst and a boric acid catalyst to improve the color and color stability of distilled products. The zinc catalyst is employed in an amount of from 0.01% to about 2.0% by weight of rosin and the boric acid in an amount from 0.001% to about 1.0% by weight of rosin. The rosin is treated with the zinc and boric acid catalyst at a temperature between 180 DEG C. and 250 DEG C.
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