Inner-circulation supergravity heterogeneous-catalysis hydrogenation unit and application thereof

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

Active Publication Date: 2018-01-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • 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 proces...

Method used

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  • Inner-circulation supergravity heterogeneous-catalysis hydrogenation unit and application thereof

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Experimental program
Comparison scheme
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 inner-circulation supergravity heterogeneous-catalysis hydrogenation unit. The inner-circulation supergravity heterogeneous-catalysis hydrogenation unit is characterized inthat the lateral wall of a shell is provided with a gas inlet, and the upper portion of the shell is provided with a gas outlet; a liquid inlet is arranged below the lateral wall of the shell; a solid-liquid separating device is arranged at a liquid outlet at the bottom of the shell; a rotating part is arranged in the inner cavity of the closed shell of the inner-circulation supergravity heterogeneous-catalysis hydrogenation unit; the rotating part comprises a fixed rotor or a rotor containing filler and a liquid lifter; the upper end of the fixed rotor or the rotor containing filler is connected with a motor located at the upper end of the inner cavity of the inner-circulation supergravity heterogeneous-catalysis hydrogenation unit, and the lower end of the fixed rotor or the rotor containing filler is connected with the liquid lifter; the liquid lifter is used for lifting liquid at the bottom of the inner-circulation supergravity heterogeneous-catalysis hydrogenation unit to a liquiddistributor in the central cavity of the fixed rotor or the rotor containing filler; the a spiral heat exchanging pipe surrounding the liquid lifter is arranged outside the liquid lifter. The invention further discloses a method using the hydrogenation unit to perform heterogeneous-catalysis hydrogenation.

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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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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