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A kind of internal circulation supergravity heterogeneous catalytic hydrogenation device and its application

A hydrogenation device and heterogeneous catalysis technology, applied in chemical/physical processes, chemical instruments and methods, etc., can solve the problems of uncontrollable hydrogenation reaction time, low operating pressure, and long process flow.

Active Publication Date: 2021-05-04
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention patent with the publication number CN1743064A discloses a rotating bed supergravity field hydrogenation reaction device with the following characteristics: hydrogenation is carried out in the form of catalyst external circulation, which has problems such as long process flow and complicated operation; the device has no outlet liquid seal, and the operating pressure Low (0~0.4MPa); the supergravity reactor is an external circulation reactor, the material passes through the supergravity reactor at one time, and the hydrogenation reaction time is uncontrollable

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  • A kind of internal circulation supergravity heterogeneous catalytic hydrogenation device and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Inner cycle high gravity heterogeneous catalysis for selective hydrogenation of cinnamaldehyde, the steps are as follows:

[0041] 1) 100mL cinnamic acid is added in the ethanol of 1L, then add the Pt-Ni alloy catalyst (the content of Pt in the described Pt-Ni alloy catalyst is 2wt% in the particle diameter of 2.0g is 50nm. Because Pt-Ni alloy catalyst is easy It is oxidized, so it needs to be reduced in hydrogen at 400°C for 2 hours before use), and after mixing uniformly in the premixing device, a suspension is obtained;

[0042] 2) Purge the internal circulation rotary packed bed with high-purity nitrogen at room temperature for 5 minutes, remove the air in the internal circulation rotary packed bed, and preheat at 130°C for 20 minutes, and pass the suspension obtained in step 1) into the internal circulation rotary packed bed After mixing for 1 hour, hydrogen gas was introduced, and the reaction was completed at a rotation speed of 2000 rpm, 3 MPa, and 90 ° C to obt...

Embodiment 2

[0049] The method for the hydrogenation of chloronitrobenzene with high gravity heterogeneous catalysis in internal circulation, the steps are as follows:

[0050] 1) Add 200ml of chloronitrobenzene to 2L of ethanol, then add 1.5g of Pt catalyst with a particle size of 20nm, and mix well in the premixing device to obtain a suspension;

[0051] 2) Purge the internal circulation rotary packed bed with high-purity nitrogen at room temperature for 5 minutes, remove the air in the internal circulation rotary packed bed, and preheat at 130°C for 20 minutes, and pass the suspension obtained in step 1) into the internal circulation rotary packed bed After 1 hour, hydrogen gas was introduced again, and the reaction was carried out at 1800 rpm, 2 MPa, and 120°C for 1 hour to obtain a liquid-solid mixture;

[0052] 3) After the liquid-solid mixture in step 2) is separated by the liquid-solid separation device at the bottom of the internal circulation rotating packed bed, the catalyst is ...

Embodiment 3

[0058] The method for the hydrogenation of cinnamaldehyde with high-gravity heterogeneous catalysis in internal circulation, the steps are as follows:

[0059] 1) Add 300mL of cinnamaldehyde to 3L of ethanol, then add 3.0g of Pt catalyst with a particle size of 20nm, mix evenly in a premixing device to obtain a suspension;

[0060] 2) Purge the internal circulation rotary packed bed with high-purity nitrogen at room temperature for 5 minutes, remove the air in the internal circulation rotary packed bed, and preheat at 110°C for 20 minutes, and pass the suspension obtained in step 1) into the internal circulation rotary packed bed for 1 hour After that, hydrogen gas was introduced again, and the reaction was carried out at 7 MPa and 110° C. for 1 hour at a rotational speed of 2000 rpm to obtain a liquid-solid mixture;

[0061] 3) After the liquid-solid mixture in step 2) is separated by the liquid-solid separation device at the bottom of the internal circulation rotating packed...

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Abstract

The invention discloses an internal circulation supergravity heterogeneous catalytic hydrogenation device, which is provided with a gas inlet on the side wall of the casing, a gas outlet on the upper part of the casing, and a liquid inlet below the side wall of the casing ; A solid-liquid separation device is provided at the liquid outlet at the bottom of the shell; the internal circulation high-gravity heterogeneous catalytic hydrogenation device is provided with a rotating part in the inner cavity of the closed shell; the rotating part is composed of a stator and rotor or Composed of a filler-containing rotor and a liquid lifter; the upper end of the stator-rotor or the filler-containing rotor is connected to the motor located at the upper end of the cavity area of ​​the inner circulation high-gravity heterogeneous catalytic hydrogenation device, and the lower end is connected to the liquid lifter; The liquid lifter is used to lift the liquid at the bottom of the internal circulation high-gravity heterogeneous catalytic hydrogenation device to the liquid distributor in the central cavity area of ​​the stator rotor or the rotor containing filler; there is a spiral heat exchange around the liquid lifter Tube. It also discloses a method for carrying out heterogeneous catalytic hydrogenation with the hydrogenation device.

Description

technical field [0001] The invention relates to heterogeneous catalytic hydrogenation reaction and belongs to the field of industrial catalytic reaction. More specifically, it relates to an internal circulation high-gravity heterogeneous catalytic hydrogenation device and its application. Background technique [0002] A variety of unsaturated compounds will be produced in petrochemical and new coal chemical production processes. When these unsaturated compounds are used as raw materials, they will affect their processing process. In industry, hydrogenation is used to remove unsaturated compounds in raw materials. [0003] The heterogeneous particle catalyst catalytic hydrogenation technology uses hydrogen as the reducing agent, the atom economy is 100%, and it has the advantages of easy access to the catalyst, easy separation of the catalyst from the reaction system after the reaction, and the repeated use of the catalyst. Traditional heterogeneous granular catalyst catalyt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/22
Inventor 孙宝昌董坤初广文邵磊邹海魁罗勇陈建峰杨勇
Owner BEIJING UNIV OF CHEM TECH
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