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METHOD FOR PRODUCING ALIPHATIC OLIGOCARBONATE DIOLS FROM DIMETHYLCARBONATE AND ALIPHATIC DIOLS

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

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.
机译:少于5%的末端羟基被甲氧基羰基封端的脂肪族低聚碳酸酯的生产。该方法包括:(a)在可溶性催化剂的存在下,在气液逆流接触器中使碳酸二甲酯(DMC)与脂族二醇反应,直到DMC转化率大于80%。 (b)低聚产物,同时在产生低碳酸盐中的气泡的装置中除去甲醇和痕量的DMC。

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