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Appliance exterior pre-treatment for hydrogenation catalyst

A hydrogenation catalyst and pretreatment technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of increased production costs of catalysts, hidden dangers of safe storage and transportation, and eliminate external diffusion resistance , simple method, high heat transfer efficiency

Inactive Publication Date: 2005-04-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As mentioned above, in the catalyst preparation process technology, the general method of this passivation post-treatment process is realized by chemical methods, and it is an intermittent batch treatment, using a large amount of organic solvents, which leads to a significant increase in the production cost of the catalyst. improve, but also bring hidden dangers to safe storage and transportation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Out-of-device gas-phase presulfidation of catalysts in the oxidation state

[0030] Oxidation state catalyst composition MoO 3 NiO is 25.1%, NiO is 4.24%, the carrier is alumina, the diameter is 1.2-1.4mm, and the length is 3-8mm. Use a ball mill to crush the catalyst into 30-60 meshes. Add 50ml of crushed catalyst particles into a fluidized bed reactor with an inner diameter of 25mm and a height of 800mm, and adjust the flow rate of sulfide gas to 0.4Nm 3 / h, the vulcanization gas is preheated by the preheater, and then passed into the fluidized bed, so that the solid particles are in a fluidized state in the fluidized bed, and the vulcanization reaction is carried out under the conditions of 350 ° C and 0.1 MPa, and the reaction time is 2 h . H in sulfide gas 2 The volume percentage of S is 3%, H 2 25% by volume, N 2 The volume percentage content is 72%.

[0031] (2) Passivation protection treatment of sulfided catalyst

[0032] Through step (1) the produc...

Embodiment 2

[0035] (1) External presulfidation of the catalyst in the oxidation state

[0036] Put 50ml of broken catalyst particles into a fluidized bed reactor with an inner diameter of 25mm and a height of 800mm, and adjust the flow rate of sulfide gas to 0.4Nm 3 / h, after the sulfide gas is preheated by the preheater, it is passed into the fluidized bed, so that the solid particles are in a fluidized state in the fluidized bed. . The reaction time is 6h. The volume percentage of hydrogen sulfide in the sulfide gas is 10%, the volume percentage of hydrogen is 25%, and the volume percentage of argon is 65%. The particle size of the catalyst is 30-60 mesh.

[0037] (2) Passivation protection treatment of sulfided catalyst

[0038] Through step (1) the product of sulfidation reaction is in N 2 Cool under purging, add to a fluidized bed reactor, and passivate with a passivation gas containing 0.5 (Vol.)% oxygen at 60°C and 0.1MPa for 15 minutes. Keep the flow rate of the mixed gas co...

Embodiment 3

[0041] (1) External presulfidation of the catalyst in the oxidation state

[0042] Two fluidized beds with an inner diameter of 25 mm and a height of 500 mm form a serially connected secondary fluidized bed. First, add 50ml of catalyst particles to the first-stage fluidized bed reactor, and adjust the flow rate of sulfur-saving gas to 0.3Nm 3 / h, the vulcanization gas is preheated by the preheater, and then passed into the first-stage fluidized bed, so that the solid particles are in a fluidized state in the fluidized bed, and the vulcanization reaction is carried out at 450°C and 0.1MPa for 2h. H in sulfide gas 2 The volume percentage of S is 3%, H 2 The volume percentage content is 6%, N 2 The volume percentage content is 91%. The particle size of the catalyst is 30-60 mesh. The catalyst that has been vulcanized by the first-stage fluidized bed is transported to the second-stage fluidized bed with increased gas velocity, and further vulcanized at 500, 0.1MPa for 2 hours...

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PUM

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Abstract

The invention discloses a kind of the hydrogenation catalyst outside the equipment pretreating method.The method step as follows: (1) oxidation state hydrogenation catalyst outside gas phase prevulcanization:joins the Oxidation state hydrogenation catalyst in to the curing reactor, passes over the sulfur carburetion into the curing reactor to carry on the curing response; (2)the curing condition catalyst gas phase deactivation processing: joins the cured catalyst prepared in the step (1) to the deactivate reactor, uses the obtuse carburetion which contains the oxygen to deactivate the curing condition catalyst.The invention responses condition is temperate, could not produce flies the warm phenomenon, the curing is even, broke through the traditional catalysis and the curing method, reduces the catalyst carbon deposition quantity, enhances the adding sulfur rate, causes the activeness and the stability of the catalyst be remarkable enhanced, could stablely exist in the air, it is advantageous for the transportation and the preserve, greatly reduces the industry hydrogenation cost.

Description

technical field [0001] The invention relates to a method for external pretreatment of a hydrogenation catalyst Background technique [0002] Hydrogenation catalysts usually contain VIB and VIII group metals (such as W, Co, Mo, Ni, Fe, Pt, Cr, etc.), supported on alumina, silica, zirconia, titania in the form of metal oxidation states , zeolite, activated carbon, clay, aluminized cement and diatomaceous earth and other carriers, used for hydrodenitrogenation (HDN), hydrodesulfurization (HDS), hydrodearomatization (HDA), hydrodeoxygenation (HDO) , Hydrofining (HYD) and Hydrodemetallization (HDM), etc. The freshly prepared catalyst is in an oxidized state, but the catalyst activity, stability and lifetime of the oxidized state are much lower than those of the sulfurized state. Therefore, in order to obtain the best activity of the catalyst and prolong the service life of the catalyst, the catalyst needs to be Perform vulcanization pretreatment. [0003] There are many method...

Claims

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Application Information

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IPC IPC(8): B01J37/20C07C7/163C10G45/00
Inventor 阳永荣刘方陈松王靖岱
Owner ZHEJIANG UNIV
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