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Three-phase flow reaction device for olefin hydroformylation and operation method of device

An olefin hydroformyl and reaction device technology, applied in the field of gas-liquid-solid three-phase circulating fluidized reactor and heat exchanger coupling device, can solve the problems of reactor overheating, heat accumulation, catalyst decomposition, etc. Achieve the effect of increasing the heat transfer coefficient and the total heat exchanger coefficient, thinning the heat transfer boundary layer, and reducing the content of by-products

Active Publication Date: 2019-09-06
河南能源化工集团研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the reactors used for olefin hydroformylation mainly have the following problems: (1) The synthetic aldehyde products or solvents are not completely separated from the catalyst, resulting in the loss of precious metal catalysts and large catalyst consumption; (2) High reaction temperature, Causes the decomposition and deactivation of the catalyst, shortening the service life of the catalyst; (3) The conversion rate of raw materials is not high, and the by-product alkane content is high, which affects the selectivity of aldehydes; the product has high impurities and low aldehyde content; (4) Reaction Influenced by the type of reactor, there are obvious temperature differences in the axial and radial directions of the reactor, heat accumulation, and the phenomenon of reactor overheating is prone to occur.

Method used

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  • Three-phase flow reaction device for olefin hydroformylation and operation method of device
  • Three-phase flow reaction device for olefin hydroformylation and operation method of device
  • Three-phase flow reaction device for olefin hydroformylation and operation method of device

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Effect test

Embodiment 1

[0046] The inner diameter of the reactor is 600 mm, the height is 15 m, and the heat exchange area of ​​the shell and tube heat exchanger is 18.4 m 2 In the three-phase flow hydroformylation reaction device, add n-butyraldehyde and a certain amount of rhodium phosphine complex catalyst and triphenylphosphine catalyst part, measure the concentration of palladium to be 50 mg / L, part triphenylphosphine The concentration is 2000 mg / L; then add spherical PTFE solid phase particles with a diameter of 3 mm, so that the solid content rate in the reactor is 4.0%; turn on the axial flow pump, the flow rate is 200 L / h, and the axial flow is adjusted by the frequency converter The rotation speed of the pump is 200~500 r / min; the heat exchanger 3 is heated with 120 °C low-pressure steam, and the temperature of the reactor is preheated to 85 °C; the synthesis gas (CO:H 2 The volume ratio is 1:1) 400 m 3 / h, nitrogen 50 m 3 / h, until the reaction pressure rises to 1.7 ~ 1.9MPa, open the fo...

Embodiment 2

[0048] The inner diameter of the reactor is 600 mm, the height is 15 m, and the heat exchange area of ​​the shell and tube heat exchanger is 18.4 m 2 In the three-phase flow hydroformylation reaction device, add propionaldehyde and a certain amount of rhodium phosphine complex catalyst and triphenylphosphine catalyst part, measure the concentration of palladium to be 50 mg / L, the content of part triphenylphosphine The concentration is 2000 mg / L; add a certain amount of spherical polymelamine solid phase particles with a diameter of 4 mm, and the solid content rate in the reactor is 8.0%; turn on the axial flow pump, the flow rate is 800 L / h, and the axial flow rate is adjusted by the frequency converter. The rotation speed of the flow pump is 500-800 r / min; the heat exchanger 3 is heated with 120 °C low-pressure steam, and the temperature of the reactor is preheated to 85 °C; the synthesis gas (CO:H 2 The volume ratio is 1:1) 400 m 3 / h, nitrogen 50 m 3 / h, until the reactio...

Embodiment 3

[0050] The inner diameter of the reactor is 600 mm, the height is 15 m, and the heat exchange area of ​​the shell and tube heat exchanger is 18.4 m 2 In the three-phase flow hydroformylation reaction device, add n-valeraldehyde and a certain amount of rhodium phosphine complex catalyst and triphenylphosphine catalyst part, measure the concentration of palladium to be 50 mg / L, part triphenylphosphine The concentration is 2000 mg / L; then add columnar polyvinyl chloride solid phase particles with a diameter (equivalent) of 8 mm, so that the solid content rate in the reactor is 15%; turn on the axial flow pump, the flow rate is 200L / h, and the frequency conversion Adjust the rotational speed of the axial flow pump to 100~200 r / min; heat the heat exchanger 3 with 120 °C low-pressure steam, and preheat the reactor temperature to 85 °C; feed synthesis gas (CO:H 2 The volume ratio is 1:1) 400 m 3 / h, nitrogen 50 m 3 / h, until the reaction pressure rises to 1.7 ~ 1.9 MPa, open the fo...

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Abstract

The invention belongs to the field of reactor engineering, and relates to a three-phase flow reaction device for olefin hydroformylation. The three-phase flow reaction device comprises a reactor, a heat exchanger and a gas distributor, wherein the center of the top end of the heat exchanger is communicated with the reactor through a right-angled bent pipeline, the center of the bottom end of the heat exchanger is also communicated with the reactor through a pipeline, and an axial flow pump is further arranged at the bent position of the pipeline communicated with the bottom end of the heat exchanger; the gas distributor is arranged at the bottom end of the reactor, and a wire mesh demister is further horizontally arranged in the upper end of the reactor. The gas-liquid-solid three-phase circulation fluidized reactor and the heat exchanger are coupled and used for a hydroformylation reaction, so that dynamic circulation of a liquid-solid phase is formed between the reactor and the tubular heat exchanger, the mass transfer and heat transfer process is effectively promoted, the selectivity of the raw material gas conversion rate and target product aldehyde is remarkably improved, thetotal heat exchange coefficient of the heat exchanger is increased, and the required heat exchange area is reduced; through gas-liquid-solid three-phase fluidization, the good effect of promoting themass transfer of the reaction and heat transfer of the external circulation heat exchanger is realized.

Description

technical field [0001] The invention belongs to the field of reactor engineering, and in particular relates to a gas-liquid-solid three-phase circulating fluidized reactor and heat exchanger coupling device and an operation method thereof, which are used for hydroformylation reaction of olefins. Background technique [0002] As an important class of chemical products and chemical raw materials, aldehydes are mainly used in the production of chemical intermediates and polymer monomers such as acids, alcohols, ketoximes and enaldehydes. They are used in pharmaceutical and pesticide raw materials, engineering plastics, coatings and textile aids Pharmaceutical and other industries have a wide range of uses. In recent years, the demand for aldehyde products in domestic and foreign markets is still increasing. [0003] At present, olefins, carbon monoxide and hydrogen are used as raw materials, and a noble metal complex catalyst system is used to pass the mixed raw material gas i...

Claims

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Application Information

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IPC IPC(8): B01J8/18C07C45/50C07C47/02
CPCB01J8/18B01J8/1836C07C45/50C07C47/02Y02P20/10
Inventor 宋军超丁蕊周巧丽穆仕芳魏灵朝崔发科蒋元力牛刚曹洪刚
Owner 河南能源化工集团研究总院有限公司