| 摘要 |
Excess water and color-forming materials present in crude 1,4-butanediol are reduced by subjecting the crude 1,4-butanediol to distillation under conditions wherein substantially all the water present in the crude 1,4-butanediol is first removed and then the 1,4-butanediol with reduced water content is further refined by flash evaporation under vacuum.
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