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Heterogeneous oxidative desulfurization catalyst and preparation method thereof

An oxidative desulfurization and catalyst technology, which is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of limited application range, limited mass transfer, poor stability of active components, etc., to improve the surface environment , reduce mass transfer resistance, enhance the effect of stability

Pending Publication Date: 2021-10-22
YINGKOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors of the present invention have discovered that hydrodesulfurization is currently the most mature desulfurization technology, but due to problems such as high production cost and loss of octane number, hydrodesulfurization limits its application range and is not suitable for deep desulfurization; In the desulfurization process, oxidative desulfurization technology has broad practical application prospects due to its relatively mild reaction conditions and high removal efficiency for aromatic heterocyclic sulfides; however, the presence of non-hydrogenation catalysts requires catalyst separation and recovery Difficulty, poor stability of active components, and limited mass transfer during the reaction process, which greatly limit its wide application in actual industrial production; under the premise of ensuring high performance and low consumption, strive to achieve the goal of green environmental protection At the same time, the development and design of an efficient and stable heterogeneous oxidative desulfurization catalyst has important theoretical significance and industrial application prospects

Method used

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  • Heterogeneous oxidative desulfurization catalyst and preparation method thereof
  • Heterogeneous oxidative desulfurization catalyst and preparation method thereof
  • Heterogeneous oxidative desulfurization catalyst and preparation method thereof

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preparation example Construction

[0044] This paper discloses a preparation method of a heterogeneous oxidative desulfurization catalyst, comprising the following steps:

[0045] Step (a) preparing transition metal-modified phosphomolybdenum heteropolyacids by hydrothermal synthesis;

[0046] Step (b) modifying the hydrophobic group onto the mesoporous material to obtain a functionalized carrier one;

[0047] Step (c) modifying the active group on the carrier 1 to obtain the carrier 2;

[0048] Step (d) load the phosphomolybdenum heteropoly acid on the carrier 2 to obtain the final product.

[0049] The embodiment of the present invention also discloses a preparation method of a heterogeneous oxidative desulfurization catalyst, comprising the following steps:

[0050] Step (e) preparing transition metal-modified phosphomolybdenum heteropolyacids by hydrothermal synthesis;

[0051] Step (f) modifying the hydrophobic group onto the mesoporous material to obtain a functionalized carrier 3;

[0052] Step (g) L...

Embodiment 1

[0078] On the basis of the disclosed embodiments, a method for preparing a heterogeneous oxidative desulfurization catalyst is disclosed, and the above steps (a), step (e) and step (h) also include the following steps:

[0079] (1) prepare respectively containing phosphate, transition metal salt and molybdate solution;

[0080] (2) Mix and cool the phosphate and transition metal salt solutions, adjust the pH value to 0.5, and add concentrated sulfuric acid dropwise until the mixed solution is clear to obtain mixed solution 1;

[0081] (3) After the mixed solution is extracted with an organic solvent, it is separated and dried at low temperature to obtain the molybdophosphopolyacid.

[0082] Preferably, the organic solvent includes ether; the drying temperature is 60°C; the phosphate-containing salt is H 2 PO 4 - 、HPO 4 2- 、PO 4 3- ; The transition metal salt is Co(NO 3 ) 2 ·6H 2 O; the molybdate is Na 2 MoO 4 ·H 2 O.

[0083] Preferably, said step (b), step (c), ...

Embodiment 2

[0099] On the basis of the disclosed embodiments, a method for preparing a heterogeneous oxidative desulfurization catalyst is disclosed, and the above steps (a), step (e) and step (h) also include the following steps:

[0100] (1) prepare respectively containing phosphate, transition metal salt and molybdate solution;

[0101] (2) Mix and cool the phosphate and transition metal salt solutions, adjust the pH value to 2.5, and add concentrated sulfuric acid dropwise until the mixed solution is clear to obtain mixed solution 1;

[0102] (3) After the mixed solution is extracted with an organic solvent, it is separated and dried at low temperature to obtain the molybdophosphopolyacid.

[0103] Preferably, the organic solvent includes ether; the drying temperature is 100°C; the phosphate-containing salt includes H 2 PO 4 - 、HPO 4 2- 、PO 4 3- ; The transition metal salt comprises Co(NO 3 ) 2 ·6H 2 O; the molybdate comprises Na 2 MoO 4 ·H 2 O.

[0104] Preferably, said...

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Abstract

The invention relates to the technical field of organic chemical industry, in particular to a heterogeneous oxidative desulfurization catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing transition metal modified phosphomolybdic heteropoly acid by adopting a hydrothermal synthesis method; modifying a mesoporous material with a hydrophobic group to obtain a functionalized carrier I; modifying the carrier I with an active group to obtain a carrier II; and loading the phosphomolybdic heteropoly acid on the carrier II to obtain a final product. The heterogeneous oxidative desulfurization catalyst has the following characteristics: the introduction of hydrophobic organic functional groups improves the surface environment of the catalyst, reduces the mass transfer resistance between liquid-solid and liquid-liquid phases in a heterogeneous catalytic system, and is beneficial to the mass transfer of a reactant system; the introduction of an amino functional group is beneficial to constructing an active center matched with reaction characteristics on the surface of the carrier and enhancing the stability of the active center; and the problems that in the prior art, active components are poor in stability, and mass transfer is limited easily in the reaction process are solved, and the catalyst has the advantages of being efficient and stable.

Description

technical field [0001] The invention relates to the technical field of organic chemical industry, in particular to a heterogeneous oxidative desulfurization catalyst and a preparation method thereof. Background technique [0002] In recent years, due to the consideration of environmental pollution, governments around the world have become more and more aware of the importance of deep desulfurization of fuel oil. Fossil energy represented by fuel oil is still the most important source of energy, but due to the residue of various sulfur components in the process of oil production, these sulfur elements will seriously corrode pipelines and internal combustion engines during combustion, reducing its use. Life, and the combustion products contain a large amount of sulfur dioxide, which seriously pollutes the environment. Therefore, desulfurization of fuel oil before use is the choice for most applications. At present, the methods of desulfurization of fuel oil on the market are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J29/04B01J27/19C10G45/08C10G45/12
CPCB01J31/0274B01J31/0275B01J29/041B01J27/19C10G45/12C10G45/08C10G2300/202B01J2229/186
Inventor 陈晓陆高爽李振邓书平刘海燕张俊茹葛登文张今红肖舒宁王珂何嘉仪
Owner YINGKOU INST OF TECH
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