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Mercaptan removal catalyst as well as preparation method and application thereof

A catalyst and sweetening technology, applied in the direction of catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as the inability to reduce the total sulfur content, reduce the heat effect of adsorption, reduce operational risks, and enhance chemical adsorption capacity Effect

Active Publication Date: 2016-12-21
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects that existing demercaptan catalysts need to exert demercaptan activity under hydrogen conditions, and can only convert mercaptans but cannot reduce the total sulfur content, and then provide a catalyst that does not require Demercaptan catalyst capable of demercaptanization upon application of hydrogen and simultaneously reducing total sulfur content in oil, preparation method and application thereof

Method used

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  • Mercaptan removal catalyst as well as preparation method and application thereof
  • Mercaptan removal catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of the sweetening catalyst provided by the present embodiment comprises the following steps:

[0044] (1) Modification of molecular sieve

[0045] Disperse 13X molecular sieve into 0.5mol / L cerium nitrate aqueous solution (mass ratio of molecular sieve to cerium = 1:10), perform ion exchange at 25°C, filter after reacting for 6h, collect solid phase, and Dry at 100°C for 2 hours, and then bake at 400°C for 6 hours to prepare cerium-modified molecular sieves;

[0046] (2) Preparation of carrier

[0047] The cerium-modified molecular sieve that step (1) makes and macroporous alumina dry rubber powder (pore volume > 1cm 3 / g, specific surface area>300m 2 / g) mixed at a mass ratio of 1:0.5, then added an appropriate amount of silica sol and starch to form a mixture, extruded the mixture, dried at 90°C for 3 hours, and then roasted at 400°C for 3 hours to obtain a carrier;

[0048] (3) Loading of active components

[0049] Prepare an aqueous solut...

Embodiment 2

[0054] The preparation method of the sweetening catalyst provided by the present embodiment comprises the following steps:

[0055] (1) Modification of molecular sieve

[0056] Disperse NaY molecular sieve into 0.1mol / L europium nitrate aqueous solution (mass ratio of molecular sieve to europium=1:12), and perform ion exchange at 50°C, filter after reacting for 5h, collect solid phase, and Dry at 110°C for 1 hour, and then bake at 500°C for 3.5 hours to prepare europium-modified molecular sieves;

[0057] (2) Preparation of carrier

[0058] With the europium-modified molecular sieve that step (1) makes and macroporous alumina dry rubber powder (pore volume > 1cm 3 / g, specific surface area>300m 2 / g) mixed at a mass ratio of 1:0.8, then added an appropriate amount of silica sol and starch to form a mixture, extruded the mixture, dried at 100°C for 3 hours, and then roasted at 500°C for 3 hours to obtain a carrier;

[0059] (3) Loading of active components

[0060] Prepare...

Embodiment 3

[0065] The preparation method of the sweetening catalyst provided by the present embodiment comprises the following steps:

[0066] (1) Modification of molecular sieve

[0067] Disperse NaY molecular sieve into 0.7mol / L lanthanum nitrate aqueous solution (mass ratio of molecular sieve to lanthanum = 1:8), perform ion exchange at 80°C, filter after reacting for 7h, collect solid phase, and Dry at 90°C for 3 hours, and then bake at 600°C for 1 hour to prepare lanthanum-modified molecular sieves;

[0068] (2) Preparation of carrier

[0069] The lanthanum-modified molecular sieve that step (1) makes and macroporous alumina dry rubber powder (pore volume > 1cm 3 / g, specific surface area>300m 2 / g) mixed at a mass ratio of 1:0.7, then added an appropriate amount of silica sol and starch to form a mixture, extruded the mixture, dried at 90°C for 3 hours, and then roasted at 500°C for 4 hours to obtain a carrier;

[0070] (3) Loading of active components

[0071] Prepare the aqu...

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Abstract

The invention provides a mercaptan removal catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier, an active component and an oxidizing auxiliary agent heteropoly acid, wherein the carrier is composed of alumina and a rare earth element-modified molecular sieve; the active component is one or more of group IA, IIA, IB, IIB, VIIB or VIII metal oxide. The catalyst provided by the invention can change a pore structure and the adsorption performance of the molecular sieve by modifying the molecular sieve, and enhance the chemical adsorption capacity of the catalyst carrier to the mercaptan so as to be more favorable for adsorbing the mercaptan; meanwhile, the catalyst provided by the invention oxidizes the mercaptan into corresponding disulfide by using the strong oxidizing property of the heteropoly acid and then is adsorbed by the composite carrier, thereby allowing the mercaptan removal catalyst provided by the invention to remove the mercaptan without hydrogenation while reducing the total sulfur content, and achieving the purpose of thoroughly and effectively removing the mercaptan.

Description

technical field [0001] The invention belongs to the technical field of desulfurizing agents, and in particular relates to a desulfurizing agent capable of removing mercaptans in liquefied gas at normal temperature, a preparation method and application thereof. technical background [0002] Globally, with the increase of oil field exploitation depth, the tendency of crude oil to deteriorate becomes more and more obvious, and one of its main characteristics is the increase of sulfur content. Crude oil contains different forms of sulfides. In the process of petroleum refining or secondary processing, these sulfides will eventually enter into petroleum products such as liquefied petroleum gas (liquefied petroleum gas for short), and liquefied petroleum gas is used as a chemical basic raw material and The high sulfur content of new fossil fuels will not only corrode pipeline equipment, cause deactivation of catalysts in subsequent stages and unqualified target product quality, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/06B01J27/188C10L3/12
CPCC10L3/12B01J27/188B01J29/061B01J29/072B01J29/076B01J29/163B01J29/166B01J29/7815B01J37/0201B01J35/19B01J35/00B01J35/30
Inventor 徐龙刘聪张媛倪雪梅
Owner SHENYANG SANJUKAITE CATALYST
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