Method for synthesizing epoxy propane with oxygen and hydrogen permeable coupled membrane microreactor
A technology of propylene oxide and microreactor, which is applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of explosion hazard safety, low raw material utilization rate, and easy deactivation of catalysts, so as to avoid safety hidden danger, increase the reaction surface area, save the effect of sensitization-activation step
Active Publication Date: 2019-05-31
SHANDONG UNIV OF TECH
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However, there are several major obstacles in this route: (1) the catalyst is easily deactivated and has poor stability; (2) O 2 / H 2 / C 3 h 6 Mixed feeds can easily lead to excessive oxidation and hydrogenation side reactions; (3) H 2 -O 2 Direct contact, there is a serious explosion hazard and safety hazard; (4) a large amount of H 2 converted to H 2 O, raw material utilization rate is low
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] Definitions of abbreviations and key terms in the present invention:
[0021] LSCF: Cubic Perovskite La 1-x Sr x co 1-y Fe y o 3-δ , is La(NO 3 ) 3 ·6H 2 O, Sr(NO 3 ) 2 , Co(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O is mixed in proportion and made by sol-gel method. can be la 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3-δ , where the ratio of 0.6 / 0.4 / 0.2 / 0.8 can be changed, it can also be 0.6 / 0.4 / 0.5 / 0.5, or 0.6 / 0.4 / 0.8 / 0.2, so it is called LSCF for ...
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The invention discloses an oxygen and hydrogen permeable coupled membrane microreactor for green synthesis of epoxy propane. The oxygen and hydrogen permeable coupled membrane microreactor comprises an oxygen permeable reaction section and a hydrogen permeable reaction section which are connected with a propylene box; the oxygen permeable reaction section is provided with a hollow fiber oxygen permeable membrane for separating oxygen from air; the hydrogen permeable section is provided with a palladium compound hollow fiber ceramic hydrogen permeable membrane for dissociating hydrogen atoms from hydrogen; propylene is continuously fed into the propylene box and combined together with the oxygen separated from the oxygen permeable reaction section into the hydrogen permeable reaction section, and the oxygen can be bonded with the hydrogen atoms dissociated from the hydrogen permeable reaction section to produce active groups, which further react with the propylene to produce the epoxy propane. By directly taking the air the raw material, the oxygen and hydrogen permeable coupled membrane microreactor for green synthesis of the epoxy propane can reduce the cost, improve the bonding degree between the palladium membrane and an Al2O3 bottom membrane, greatly enhance stability of the palladium membrane and effectively avoid the potential risk of explosion hazard caused by directly mixing hydrogen and oxygen.
Description
technical field [0001] The invention relates to a method for preparing propylene oxide, in particular to a method for synthesizing propylene oxide with an oxygen-permeable hydrogen-permeable coupled membrane microreactor. Background technique [0002] Propylene oxide (PO) is an important organic chemical raw material. It is widely used in the chemical industry to manufacture polyether polyols, propylene glycol, propylene carbonate, etc., and is widely used in chemical, pharmaceutical, and automotive industries. Currently, PO production methods mainly include chlorohydrin method and co-oxidation method. The chlorohydrin method needs to use a large amount of chlorine gas, the equipment is severely corroded, and a large amount of chlorine-containing "three wastes" are produced, resulting in relatively large pollution. The co-oxidation method has long process, high investment, harsh reaction conditions and many by-products. With the focus on atom economy and environmental bene...
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IPC IPC(8): C07D303/04C07D301/08B01D69/08B01D71/02B01D67/00
Inventor 王晓斌邹成贤刘伟邹怡明王宜尚孟波于如军
Owner SHANDONG UNIV OF TECH