Process for the production of propylene glycol from lactate ester

    公开(公告)号:US10532967B2

    公开(公告)日:2020-01-14

    申请号:US16340838

    申请日:2017-10-17

    Abstract: A process for the production of propylene glycol from a lactate ester is disclosed. The process comprises supplying a feed comprising a C3-6 alkyl lactate ester. The feed is contacted with a stream of hydrogen containing gas and subjected to hydrogenation in the vapour phase in the presence of a catalyst at a temperature of from about 130° C. to about 185° C., a pressure of from about 20 bar to about 60 bar, and a weight hourly space velocity greater than about 0.3 h−1. The catalyst is a reduced copper catalyst selected from copper alumina, optionally comprising manganese, copper chromite, copper zinc oxide and Raney copper.

    Method for the production of glycols from sorbitol

    公开(公告)号:US10414708B2

    公开(公告)日:2019-09-17

    申请号:US16319960

    申请日:2017-07-25

    Abstract: Implementations of the disclosed subject matter provide a process for producing ethylene glycol and propylene glycol from a sorbitol feed which may include contacting the sorbitol feed with hydrogen in a reactor in the presence of a solvent and a bi-functional catalyst system. The bi-functional catalyst system may include a first catalyst comprising a copper compound, a zinc compound, and an additional metal compound and a second catalyst comprising sodium carbonate.

    PROCESS
    37.
    发明申请
    PROCESS 审中-公开

    公开(公告)号:US20190263739A1

    公开(公告)日:2019-08-29

    申请号:US16340838

    申请日:2017-10-17

    Abstract: A process for the production of propylene glycol from a lactate ester is disclosed. The process comprises supplying a feed comprising a C3-6 alkyl lactate ester. The feed is contacted with a stream of hydrogen containing gas and subjected to hydrogenation in the vapour phase in the presence of a catalyst at a temperature of from about 130° C. to about 185° C., a pressure of from about 20 bar to about 60 bar, and a weight hourly space velocity greater than about 0.3 h−1. The catalyst is a reduced copper catalyst selected from copper alumina, optionally comprising manganese, copper chromite, copper zinc oxide and Raney copper.

    Method for preparing ethylene glycol by hydrolysing ethylene glycol monomethyl ether

    公开(公告)号:US10315973B2

    公开(公告)日:2019-06-11

    申请号:US15763296

    申请日:2015-12-08

    Abstract: This invention provides a method for preparing ethylene glycol by hydrolyzing ethylene glycol monomethyl ether. The method comprises passing a fresh raw material containing ethylene glycol monomethyl ether and water through a reaction zone loaded with a solid acid catalyst to react under the following conditions; separating the reacted mixture via a separation system to obtain a target product of ethylene glycol, by-products containing methanol, dimethyl ether and ethylene glycol-based derivatives, and an unreacted raw material containing ethylene glycol monomethyl ether and water; passing the target product of ethylene glycol into a product collection system; and passing methyl alcohol and dimethyl ether in the by-products into a by-product collection system; and after being mixed with the fresh raw materials containing ethylene glycol monomethyl ether and water, the ethylene glycol-based derivatives in the by-products and the unreacted raw material containing ethylene glycol monomethyl ether and water being recycled into the reaction zone, to realize the preparation of ethylene glycol by hydrolyzing ethylene glycol monomethyl ether. This invention provides a new process to realize the preparation of ethylene glycol by hydrolyzing ethylene glycol monomethyl ether. And in the method, the catalyst has long life and good stability.

    Salt removal and transport system and method for use in a mono ethylene glycol reclamation process

    公开(公告)号:US10252182B2

    公开(公告)日:2019-04-09

    申请号:US15494985

    申请日:2017-04-24

    Abstract: Systems and methods for removing solids from a process stream being fed into a flash separator include a solids fluidization device and a solids removal device. The solids fluidization device at the bottom end of the fluid column of the flash separator introduces a swirling motive fluid within the fluid column, while the solids removal device located above the solids fluidization device removes the slurry created by the swirling motive fluid. Systems and methods for fluidizing solids in the fluid column of a flash separator include a solids fluidization device that introduces a swirling motive fluid within the fluid column, means to limit the upward movement of the swirling motive fluid, such as a valve, and removing the solid slurry produced by the swirling motive fluid.

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