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A kind of iron-based hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst, iron-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficult vulcanization, poor dispersibility, and low catalytic hydrogenation activity of hydrogenation catalysts. To achieve the effect of improving catalytic hydrogenation activity, improving dispersion and enriching active sites

Active Publication Date: 2022-07-05
福建三聚福大化肥催化剂国家工程研究中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, what the present invention aims to solve is the defects of existing hydrogenation catalysts that are relatively difficult to sulfide, poor in dispersibility and low in catalytic hydrogenation activity, and then provides an iron-based hydrogenation catalyst that is easy to sulfide, good in dispersibility and high in catalytic hydrogenation activity. Hydrogen catalyst and its preparation method

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  • A kind of iron-based hydrogenation catalyst and preparation method thereof
  • A kind of iron-based hydrogenation catalyst and preparation method thereof
  • A kind of iron-based hydrogenation catalyst and preparation method thereof

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Embodiment 1

[0039] The present embodiment provides an iron-based hydrogenation catalyst and a preparation method thereof, and the preparation method comprises the following steps:

[0040] 1) using α-FeOOH powder as a raw material, adding water in a slurry tank and stirring to prepare an iron oxide compound slurry, the solid content of the iron oxide compound in the iron oxide compound slurry is 15wt%;

[0041] 2) Add Na to the ferrite slurry2 S, to ensure that ferrite and Na 2 The molar ratio of S is 1:2.5, and the vulcanization reaction is carried out at 50°C and 3MPa;

[0042] 3) adding H to the ferric oxide slurry after vulcanization 2 O 2 , to ensure that the sulfur-state iron and H in the ferric oxide slurry after vulcanization 2 O 2 The molar ratio is 1:3.0, and the oxidation reaction is carried out at 60°C and 2MPa;

[0043] 4) repeat above-mentioned vulcanization reaction and oxidation reaction once, make the mol ratio of iron element and sulfur element be 1:3.5 in the slurr...

Embodiment 2

[0046] The present embodiment provides an iron-based hydrogenation catalyst and a preparation method thereof, and the preparation method comprises the following steps:

[0047] 1) Using magnetic iron oxide Fe 21.333 O 32 The powder is the raw material, and the aqueous solution of sodium hydroxide is added to the slurry tank to prepare the ferric compound slurry, and the pH value of the ferric compound slurry is maintained at 8.0. The solid content of the ferric compound in the ferric compound slurry is 2wt%;

[0048] 2) Add (NH) to the ferrite slurry 4 ) 2 S, to ensure that ferrite and (NH 4 ) 2 The molar ratio of S is 1:4.0, and the vulcanization reaction is carried out at 10°C and 5MPa;

[0049] 3) Pour oxygen-containing gas into the ferrous compound slurry after vulcanization to ensure that the molar ratio of sulfuric iron and oxygen in the ferric oxide compound slurry after vulcanization is 1:0.5, and at 90 ° C, 0.1 MPa Under the oxidation reaction;

[0050] 4) rep...

Embodiment 3

[0053] The present embodiment provides an iron-based hydrogenation catalyst and a preparation method thereof, and the preparation method comprises the following steps:

[0054] 1) Using amorphous FeOOH powder as a raw material, adding an aqueous solution of potassium hydroxide in a slurry tank and stirring to prepare an iron oxide compound slurry, maintaining the pH value of the iron oxide compound slurry at 8.5, and the iron in the iron oxide compound slurry. The solid content of the oxygen compound is 20 wt%;

[0055] 2) Add carbonyl sulfide-containing gas to the iron oxide compound slurry to ensure that the iron oxide compound and Na 2 The molar ratio of S is 1:0.5, and the vulcanization reaction is carried out at 90°C and 0.1MPa;

[0056] 3) Pour oxygen-containing gas into the ferrous compound slurry after vulcanization to ensure that the molar ratio of sulfuric iron and oxygen in the ferric oxide compound slurry after vulcanization is 1:6.0, and at 10° C., 5MPa under ca...

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Abstract

The invention discloses an iron-based hydrogenation catalyst and a preparation method thereof. In the preparation method, the iron oxide compound is subjected to a sulfidation-oxidation reaction. During the process, the iron oxide compound and the iron-sulfur compound crystal phase undergo reconstruction and transformation, and the unit cell of the iron oxide compound also undergoes shrinkage and expansion, thereby resulting in an iron oxide that is originally structurally stable. The crystalline particles of the oxygen compound become loose and cracked, and a large amount of nano-iron compounds are produced. The nano-iron compounds have good sulfide affinity and are easily sulfided. At the same time, the surface of the nano-iron compound is covered with a non-polar elemental sulfur layer. The elemental sulfur layer can not only hinder the agglomeration and growth of the nano-iron compound particles, greatly improve its dispersibility, but also utilize the similarity between substances. Compatibility characteristics make the nano-iron compound highly dispersed in non-polar oil products, which greatly improves the catalytic hydrogenation activity of the hydrogenation catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to an iron-based hydrogenation catalyst and a preparation method thereof, in particular to a nano-iron-based hydrogenation catalyst and a preparation method thereof. Background technique [0002] The suspended bed hydrogenation process is a heavy oil hydrogenation process that uses inferior heavy oil as raw material and produces light fuel oil as the processing purpose. This process is suitable for the lightening of low-quality heavy oil with high metal, high residual carbon and high asphaltene, and has the characteristics of high conversion rate per pass, high yield of diesel fraction, and high cetane number. The hydrogenation process is mainly based on thermal cracking reaction and supplemented by hydrogenation reaction. The addition of catalyst is to inhibit the condensation reaction of free radicals generated when the cracking reaction is violent, and minimize the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043C10G47/06
CPCB01J27/043C10G47/06
Inventor 江莉龙马永德曹彦宁林科
Owner 福建三聚福大化肥催化剂国家工程研究中心有限公司
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