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METHOD FOR PRODUCING ALIPHATIC OLIGOCARBONATE DIOLS FROM DIMETHYLCARBONATE AND ALIPHATIC DIOLS
METHOD FOR PRODUCING ALIPHATIC OLIGOCARBONATE DIOLS FROM DIMETHYLCARBONATE AND ALIPHATIC DIOLS
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机译:由碳酸二甲酯和脂肪族二酚制备脂肪族低碳二酚的方法
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摘要
Production of aliphatic oligocarbonates where less than 5% of terminal hydroxy groups are capped with methoxycarbonyl groups. The process comprises: (a) reacting dimethyl carbonate (DMC) with an aliphatic diol in a gas-liquid countercurrent contactor in the presence of a soluble catalyst until the DMC conversion is more than 80%; and (b) oligomerizing the product while eliminating methanol and traces of DMC in an apparatus that generates gas bubbles in the oligocarbonate.
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