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A reaction device and reaction method for catalytic dehydrogenation of alkanes

A reaction device and catalytic dehydrogenation technology, applied in chemical instruments and methods, dehydrogenation to hydrocarbons, organic chemistry, etc., can solve problems such as the complexity of the reaction regeneration system, and achieve the effect of eliminating potential safety hazards and avoiding flameout

Active Publication Date: 2020-06-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 2015 1000 3556.0 In view of the problem that the reaction regeneration system is too complicated in the scheme proposed by ZL 201110123675.1, a simplified circulating fluidized bed scheme is proposed, and the regenerator is improved to ensure that the fuel can be fully combusted and fully exchange heat with the catalyst

Method used

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  • A reaction device and reaction method for catalytic dehydrogenation of alkanes
  • A reaction device and reaction method for catalytic dehydrogenation of alkanes
  • A reaction device and reaction method for catalytic dehydrogenation of alkanes

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preparation example Construction

[0066] The preparation method of alkane dehydrogenation to olefins by using the above-mentioned reaction device for alkane dehydrogenation to olefins comprises the following steps, the raw material enters the reaction section from the feed distributor, and is contacted with the catalyst for catalytic reaction, wherein the raw material is upward in the reaction section The average linear velocity of the flow is controlled at 0.01-3.0m / s, the reaction temperature is controlled at 500-650°C, and the mass space time of the reaction is 0.1-15h.

[0067] In certain embodiments, the reaction temperature is controlled between 550°C and 620°C.

[0068] In certain embodiments, the mass space time of the reaction is 1-8 hours.

[0069] The pressure at the top of the settling section of the reaction device is controlled at -0.01 to 0.1 MPa, preferably 0 to 0.05 MPa (table).

[0070] In some embodiments, the superficial gas velocity in the riser is 1-20 m / s, preferably, 3-10 m / s.

[0071...

Embodiment 1

[0094] This embodiment refers to the attached figure 1 As shown, the reaction device for the catalytic dehydrogenation of alkanes provided in this application is used in combination with the catalyst regeneration device provided in this application. These two sets of devices can be used separately, and respectively used in combination with other reaction devices or catalyst regeneration devices in the prior art.

[0095] attached figure 1 The reaction device for the catalytic dehydrogenation of alkane comprises a reaction section 1 and a settling section 15, the settling section 15 is located on the top of the reaction section 1, the settling section 15 is an equal-diameter tank structure, and the reaction section 1 is an equal-diameter cylindrical structure. Section 1 has a smaller diameter than settling section 15 . The lower part of the reaction section 1 is a diameter-reducing section 17 (stripping section), which is connected with the inclined tube 18 for the catalyst t...

Embodiment 2

[0107] Propane dehydrogenation produces propylene, adopts the equipment of embodiment 1 of the present invention

[0108] Raw material: 99.87wt% propane, feed rate 0.5t / h

[0109] Catalyst: Environmentally friendly metal oxide catalyst ADHO-1 (ZL 2011 1012 3675.1)

[0110] Reaction conditions: the average temperature of the bed is 600°C; the pressure of the settler is 0.025MPa; the mass space time is 4h; the superficial gas velocity of the gas in the bed is 0.6m / s. The superficial gas velocity in the riser is 5m / s; the lifting medium is raw gas; the outlet of the riser is 2m away from the bed interface.

[0111] Regeneration conditions: Catalyst regeneration temperature, 700°C

[0112] The distribution mode of the high-temperature regenerant in the reactor: in the present invention, the distribution of the riser; in contrast, it directly enters the gas phase of the reactor

[0113] Table 1. Propane dehydrogenation product distribution and propylene selectivity with 99.87 wt...

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Abstract

A reaction device and regeneration device for catalytic dehydrogenation of alkanes. The reaction device includes a reaction section and a catalyst settling section. The risers are connected, and the bottom or side wall of the catalyst riser is provided with a lifting medium inlet. This reaction device is conducive to the rapid mixing of the high-temperature catalyst and the catalyst in the reaction device, and avoids the formation of local high temperature in the bed. The regeneration device includes an external circulation pipeline outside the regeneration section and the regeneration settling section. The catalyst regeneration device of the present invention can fully burn off the coke on the catalyst, and can also avoid the defect of flameout at the bottom of the regeneration section due to too low temperature.

Description

technical field [0001] The invention relates to a circulating fluidized bed reactor, in particular to a reaction device for alkane dehydrogenation in a circulating fluidized bed. Background technique [0002] Olefins and diolefins (ethylene, propylene, butene, isobutylene, isoprene and butadiene, etc.) in synthetic resins, plastics, high-octane gasoline blending components (methyl tert-butyl ether, methyl tert-amyl Ethers and alkylated oils) and other high value-added products are widely used. In addition to these olefins, steam cracking of hydrocarbons (such as steam cracking of ethane, steam cracking of naphtha), catalytic cracking of olefins (such as Superflex technology), catalytic cracking of heavy oil (such as TMP, DCC technology) and catalytic pyrolysis of heavy oil (such as CPP technology) and other processes, the catalytic dehydrogenation of alkanes is also an important technical route for the production of olefins and dienes. [0003] Dehydrogenation of alkanes, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/24C07C5/32C07C11/06C07C11/09
CPCB01J8/24B01J2208/00991C07C5/322C07C11/06C07C11/09Y02P20/584
Inventor 李春义王国玮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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