A process for producing an aliphatic isocyanate from an aliphatic primary amine comprising a carbonylation step in which an aliphatic primary amine is allowed to react with carbon monoxide at a temperature of about 100-250°C in the presence of an aromatic hydroxyl compound having a pKa value of not more than about 11, molecular oxigen and a catalyst system comprising at least one member selected from palladium and rhodium metals and components thereof and at least one member selected from iodine and bromine and compounds thereof and a combined separation and recovery step comprising a pyrolysis-distillation reaction in which the mixture of carbonylated products is heated to a temperature of from about 100 to 300°C.
一种用
脂肪族
伯胺生产
脂肪族
异氰酸酯的工艺,包括一个羰基化步骤,在该步骤中,
脂肪族
伯胺在 pKa 值不大于约 11 的芳香族羟基化合物、分子
氧化物和
催化剂体系的存在下,在约 100-250°C 的温度下与
一氧化碳反应,该
催化剂体系包括至少一种选自
钯和
铑金属及其组分的成员和至少一种选自
碘和
溴及其化合物的成员,以及一个分离和回收组合步骤,该步骤包括热解-蒸馏反应,在该反应中,羰基化产物混合物被加热到约 100 至 300°C 的温度。