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    • 8. 发明申请
    • PRODUCTION OF PROPYLENE GLYCOL MONOALKYL ETHER
    • 丙二醇单烷基醚的生产
    • WO2017066196A1
    • 2017-04-20
    • PCT/US2016/056448
    • 2016-10-11
    • LYONDELL CHEMICAL TECHNOLOGY, L.P.
    • LI, XiangminCANDELA, Lawrence, M.LEIPA, Mark, A.LEYSHON, David, W.
    • C07C41/03C07C43/13
    • C07C41/03C07C41/42C07C41/44C07C43/13
    • Processes for producing propylene glycol monoalkyl ether are described herein and include contacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture including propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream including propylene oxide and the alcohol and a first bottoms stream including propylene glycol monoalkyl ether; distilling the first bottoms stream to produce a second overhead stream including purified propylene glycol monoalkyl ether and a second bottoms stream including heavier byproducts; further distilling the second bottoms stream to form a resulting bottoms stream including caustic and heavier byproducts; introducing an alkali metal borohydride into at least a portion of the resulting bottoms stream to form an alkali metal borohydride containing stream; and introducing the alkali metal borohydride containing stream into one or more distillations upstream of recovery of the second overhead stream.
    • 本文描述了用于生产丙二醇单烷基醚的方法,并且包括使环氧丙烷和醇在碱金属或碱土金属醇盐催化剂存在下接触以产生包含丙二醇单烷基醚的烷氧基化混合物; 蒸馏烷氧基化混合物以产生包含环氧丙烷和醇的第一塔顶料流和包含丙二醇单烷基醚的第一塔底料流; 蒸馏第一塔底物流以产生包含纯化的丙二醇单烷基醚的第二塔顶物流和包含较重副产物的第二塔底物流; 进一步蒸馏第二塔底物流以形成包含苛性和较重副产物的所得塔底物流; 将碱金属硼氢化物引入至少一部分所得底部料流中以形成含碱金属硼氢化物的料流; 并且将含碱金属氢硼化物的料流引入第二塔顶料流回收的上游的一个或多个蒸馏中。