| 摘要 |
A process for purifying crude ester containing residual metallic catalyst is described. The process comprises (a) adding to a crude ester product an amorphous silicon dioxide adsorbent capable of adsorbing dissolved metallic catalyst; (b) heating the combination at a temperature of between about 80 ~C and about 130 ~C; and (c) separating the ester from the adsorbent by filtration, such that residual metallic catalyst is retained on the adsorbent.
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