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A kind of sweetening catalyst and its preparation method and application

A catalyst and desulfurization technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of inability to reduce the total sulfur content, and achieve the goal of reducing the thermal effect of adsorption, reducing operational risks, and enhancing chemical adsorption capacity. Effect

Active Publication Date: 2019-01-15
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of sweetening catalyst and its preparation method and application
  • A kind of sweetening catalyst and its preparation method and application

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 sweetening catalyst and its preparation method and application. The catalyst includes a carrier, an active component and an oxidation aid heteropolyacid, wherein the carrier is composed of alumina and a molecular sieve modified by rare earth elements. The components are one or more of Group IA, IIA, IB, IIB, VIIB or VIII metal oxides. By modifying the molecular sieve, the catalyst of the present invention can change the pore structure and adsorption performance of the molecular sieve, enhance the chemical adsorption capacity of the catalyst carrier to mercaptans, and make it more conducive to adsorbing mercaptans; at the same time, the present invention The catalyst oxidizes mercaptans to corresponding disulfides by utilizing the strong oxidizing properties of heteropolyacids, and then is adsorbed by the composite carrier of the present invention, so that the mercaptan removal catalyst of the present invention can remove mercaptans without hydrogenation At the same time, it can also reduce the total sulfur content and achieve the purpose of thorough and effective desulfurization.

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 Patents(China)
IPC IPC(8): B01J29/06B01J27/188C10L3/12
CPCB01J27/188B01J29/061B01J29/072B01J29/076B01J29/163B01J29/166B01J29/7815B01J35/0006B01J35/02B01J37/0201C10L3/12
Inventor 徐龙刘聪张媛倪雪梅
Owner SHENYANG SANJUKAITE CATALYST
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