长，以便对苯基苯酚和草酸的摩尔比为1：2带来的加合物的结晶和存款从熔体；

C. to allow a resultant adduct of diphenyl oxalate and phenol in a molar ratio of 1:2 to crystallize and deposit from the melt;

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长，以便对苯基苯酚和草酸的摩尔比为1：2带来的加合物的结晶和存款从熔体；

C. to allow a resultant adduct of diphenyl oxalate and phenol in a molar ratio of 1:2 to crystallize and deposit from the melt;

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