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Airlift external loop reactor and method

An external circulation, air-lift technology, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve problems such as increasing equipment cost and system complexity, and achieve simple structure, small power consumption, guarantee The effect of directional flow

Pending Publication Date: 2022-04-08
WANHUA CHEM GRP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Settling tanks and hydrocyclones are two typical settling equipment. Their principles are gravity settling and centrifugal settling respectively. The efficiency of centrifugal settling is much higher than that of gravity settling, but it will increase equipment cost and system complexity

Method used

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  • Airlift external loop reactor and method

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Embodiment 1

[0044] use figure 1 Reactor, the pressure in the reactor is about 10Barg, and the hydroformylation reaction is carried out in the riser, and the flat temperature is 80°C, and the catalyst is a rhodium-based catalyst (a rhodium-based homogeneous catalyst prepared in the laboratory, wherein rhodium Rh: bisphosphine complex Body 2P: Triphenylphosphine PPh 3 The ratio is 1:4:100), the liquid inlet feed is the toluene solution of allyl alcohol (the mass fraction of allyl alcohol is 20wt%), the mass flow rate is 2.5kg / hr, and the mixed gas flow rate is 3Nm 3 / hr (the molar ratio of hydrogen to carbon monoxide is 1:1), the conversion rate of allyl alcohol in the riser is 99.9%, and the selectivity of the target product 4-hydroxybutyraldehyde is 95%.

[0045] The hydrogenation reaction is carried out in the downcomer, the average temperature is 150°C, the catalyst is a weakly acidic acrylic cation exchange resin catalyst (Tianjin Bohong Resin Technology Co., Ltd., model: D113), and t...

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Abstract

The invention discloses an airlift external loop reactor and method, the airlift external loop reactor comprises an ascending pipe, a descending pipe, a connecting pipe and a gas-liquid separation zone, the connecting pipe is internally provided with a valve to regulate and control the speed of circulating liquid flowing into the ascending pipe from the descending pipe; according to the present invention, the solid catalyst can be recycled in the reactor without the additional solid-liquid separation device outside the reactor, such that the safety is improved while the power consumption is reduced, and the advantages of simple structure, high safety, high flexibility and especially suitable for the production of 1, 4-butanediol are provided.

Description

technical field [0001] The invention belongs to the field of air-lift loop reactors, and relates to an air-lift outer loop reactor with both reaction and separation functions, which can be widely used in a series of heterogeneous catalytic reaction processes, especially 1,4 - Synthesis of butanediol. Background technique [0002] The airlift reactor is a reactor that uses gas stirring to realize gas-liquid mixing or gas-liquid-solid mixing and liquid phase circulation. Its structure is simple, its mass transfer and heat transfer effect are good, and the shearing effect of the fluid in the reactor is weak, so it is widely used in the fields of biology and chemical industry. The airlift external loop reactor is a relatively common form of airlift reactor. In addition to the above advantages, it also has the characteristics of strong heat exchange capacity. [0003] The most notable feature of the air-lift outer loop reactor is the liquid circulation between the riser and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24C07C29/141C07C31/20
Inventor 陈美辰刘鹏付超刘俊贤董龙跃
Owner WANHUA CHEM GRP CO LTD
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