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Catalytic selective hydrogenation

A technology for selective hydrogenation and catalytic bed, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical-chemical stationary reactors, etc. Application technology and other issues to achieve the effect of shortening the reaction time, inhibiting side reactions, and eliminating the impact

Active Publication Date: 2007-01-17
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EP0023745A3 proposes that the high-gravity rotating bed can be used for absorption, desorption, distillation and other processes, but there are only laboratory data, and no industrial-scale application technology is disclosed

Method used

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Examples

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Embodiment 1

[0042] Using a rotating bed reactor in a supergravity field for C 2 Selective hydrogenation of distillates to remove acetylene impurities. C 2 The acetylene content in the distillate is 1.0%, and the commercially available C 2 Select the hydrogenation catalyst (BC-H-21B) into the mesh support inner part (the catalyst is separated into a small grid of about 15 cm × 15 cm × 15 cm in the rotor with a 40-mesh stainless steel wire mesh), and fixed in the super The gravity field rotates on the rotor of the bed reactor. The C2 fraction and the hydrogen pass through the catalytic bed in a co-current manner.

[0043] Carry out the processing condition of selective hydrogenation reaction as follows:

[0044] Gas space velocity: 10000h -1 , Reaction temperature: 70°C, Reaction pressure: 2.0MPa

[0045] Hydrogen / Alkyne: 1.1mol / mol,

[0046] Rotor speed: 1250-1500rpm, catalytic bed radial thickness: 135mm

[0047] Select hydrogenation result:

[0048] Residual acetylene content in...

Embodiment 2

[0050] Using a rotating bed reactor in a supergravity field for C 4 Selective hydrogenation reaction of raffinate to remove butadiene. C 4 The raffinate contains C4-alkanes: 10-20%, C4-mono-olefins: 80-90%; C4-di-olefins: 0.5-2%. C 4 Selective hydrogenation catalyst (containing 0.2% Pd / Al 2 o 3 ) is prepared according to the method disclosed in CN1321544A, the catalyst is put into the ring-shaped supporting inner part, and fixed on the rotor of the high-gravity field rotating bed reactor. The ring-shaped supporting inner part is made of two rings with 4 mm stainless steel plate, supported by 6 mm stainless steel columns between the two rings, and the ring-shaped supporting inner part is formed, wherein the outer circle is made of 10 , 8 inner circles, the gap formed between the stainless steel pillars of the inner and outer circles is sealed with stainless steel wire mesh, and 4 small holes with a diameter of 25 mm are punched on the stainless steel plate of the upper cir...

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Abstract

A selective catalytic hydrogenation process able the control the hydroselectivity includes such steps as fixing the selective hydrocatalyst to the rotator of a super-gravitational rotary-bed reactor, rotating to form a rotating catalyst bed, and making the hydrocarbon material and H2 pass through the rotating catalyst bed in parallel mode or opposite mode. Controlling the rotation speed and radial thickness of rotator can control the hydroselectivity.

Description

technical field [0001] The invention relates to a catalytic reaction method, in particular to a catalytic selective hydrogenation method using a high-gravity rotary bed reactor. Background technique [0002] The selective hydrogenation reaction of hydrocarbons is currently generally carried out in fixed-bed reactors, and one or several reactors are connected in series to realize it. The material and hydrogen pass through the fixed catalyst bed in a co-current or counter-current manner, and a selective hydrogenation reaction is realized according to the different adsorption rates of each component of the material. The fixed-bed hydrogenation reaction process has the advantages of simple structure and small back-mixing; however, the fixed-bed reactor hydrogenation also has disadvantages such as poor heat transfer and long residence time of materials. For example: when exothermic reaction is carried out in a fixed bed reactor, due to poor heat transfer performance, when the he...

Claims

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Application Information

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IPC IPC(8): B01J8/10B01J19/18B01D3/30C10G45/14
Inventor 戴伟李振虎徐立英石瑞红郭彦来陈硕彭晖
Owner CHINA PETROLEUM & CHEM CORP
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