Catalyst used for catalytic rectification selective hydrogenation, preparation method and application thereof

A technology of selective hydrogenation and catalytic rectification, applied in the directions of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The mechanical strength and wear resistance of the catalyst carrier are poor, and the effect of increasing the gas-liquid exchange area, good activity and good liquid distribution can be achieved.

Active Publication Date: 2015-04-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical strength and wear resistance of the catalyst carrier are poor, which is not conducive to catalytic rectification operation
Moreover, when this inorganic oxide carrier catalyst is used for catalytic rectification, it usually needs to be placed in the catalytic rectification tower by wrapping, bundling, etc., which is relatively complicated.

Method used

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  • Catalyst used for catalytic rectification selective hydrogenation, preparation method and application thereof
  • Catalyst used for catalytic rectification selective hydrogenation, preparation method and application thereof
  • Catalyst used for catalytic rectification selective hydrogenation, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Prepare Pd(NO 3 ) 2 Solution, using the equal volume impregnation method, put 3-5mm alumina pellets in Pd(NO 3 ) 2 After dipping in the solution, it was dried at 120°C for 4 hours, then calcined at 500°C for 2 hours, and the Pd catalyst was obtained after reduction. The Pd catalyst is pulverized and sieved to obtain catalyst powder of 80-100 mesh.

[0042] (2) Take nylon-6 particles (Baling Petrochemical, BL2340-H) and place them in the above catalyst powder, mold them with a flat vulcanizer at a temperature of 250°C and a pressure of 7 MPa for 10 minutes, take them out and cool them, sieve them, and sieve them Spherical particles are produced, and the surface of the particles is completely covered by the palladium catalyst, that is, a supported catalyst is obtained, which we call catalyst A.

[0043] Put 10 liters of the catalyst prepared above into a metal corrugated wire mesh, and pack it on a packing frame in the middle of a catalytic distillation tower with...

Embodiment 2

[0045] (1) Prepare Pt(NO 3 ) 2 Solution, using the equal volume impregnation method, the 3-5mm silica pellets in Pt(NO 3 ) 2 After dipping in the solution, it was dried at 120°C for 4 hours, and then baked at 500°C for 2 hours.

[0046] (2) Prepare 25mg / ml Zn(NO 3 ) 2 solution. The above catalyst was impregnated with Zn(NO 3 ) 2 After solution, dry at 120°C for 4 hours, then bake at 500°C for 2 hours, and obtain Pt-Zn / SiO after reduction 2 catalyst. It is pulverized and sieved, and 80-100 mesh catalyst powder is retained.

[0047] (3) Mold polypropylene powder (Maoming Petrochemical, F280M) with a flat vulcanizer at a temperature of 200 °C and a pressure of 7 MPa for 10 mins to form a sheet with a thickness of about 1 mm and a wavy shape. Lay a layer of Pt-Zn / SiO on the top and bottom of the polypropylene sheet 2 Put the catalyst powder into a flat vulcanizer, mold it for 10mins at a temperature of 200°C and a pressure of 7MPa, take it out and cool it, and the upper...

Embodiment 3

[0050] (1) Prepare Ni(NO 3 ) 2 Solution, using the excess impregnation method, the 3-5mm alumina pellets in Ni(NO 3 ) 2 Immerse in the solution, dry at 120°C for 4 hours, repeat several times until the loading of nickel nitrate reaches 60%, then bake at 500°C for 2 hours.

[0051] (2) Prepare 10mg / ml Mo(NO 3 ) 2 solution. The above catalyst was impregnated with Ni(NO 3 ) 2 After solution, it was dried at 120 °C for 4 hours, and then calcined at 500 °C for 2 hours, and Ni–Mo / Al was obtained after reduction. 2 o 3 catalyst. It is pulverized and sieved, and 80-100 mesh catalyst powder is retained.

[0052] (3) Extrude polypropylene powder (Maoming Petrochemical, F280M) into a ring-shaped plate with a thickness of 6 mm, an outer diameter of 5 mm, and an inner diameter of about 3 mm with a flat vulcanizer at a temperature of 200 ° C and a pressure of 7 MPa. – Mo / Al2O3 catalyst powder and polypropylene plate are mixed and placed in a flat vulcanizer, molded at a temperatu...

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Abstract

The invention discloses a catalyst used for catalytic rectification selective hydrogenation, which includes an organic supporter and a metal catalyst powder embedded inside the surface of the organic supporter. On the total weight of the catalyst, the content of the organic supporter is 20.0-91.85% by weight and the content of the metal catalyst powder is 8.15-80.0% by weight. The metal catalyst powder is 50-100 meshes in particle size. The organic supporter is selected from at least one of the group comprising thermoplastic resin / plastic, thermosetting resin / plastic, rubber and a modified material of the high-molecular polymer. The catalyst, when being used in a catalytic rectification selective hydrogenation technology, is excellent in activity, selectivity, anti-wearing performance, stability and mechanical strength and is better in liquid distribution, can increase a gas-liquid exchange area and a bubbling center, is high in efficiency and is less in liquid holdup. The catalyst has many advantages which are not achieved in a conventional supported catalyst.

Description

technical field [0001] The invention belongs to the field of selective hydrogenation of unsaturated hydrocarbons, in particular to a catalyst for selective hydrogenation of catalytic rectification and its preparation method and application. Background technique [0002] In the petrochemical industry, the hydrocarbon raw materials produced by steam cracking and catalytic cracking all contain one or more acetylenic or diene compounds. Alkyne compounds include acetylene, propyne, ethyl acetylene, vinyl acetylene and diacetylene, etc.; diene compounds include propadiene, 1,2-butadiene, 1,3-butadiene, etc. Alkyne compounds and diene compounds, as impurities in olefin raw materials, affect the stability of catalysts used in the further processing of olefins. In industry, fixed bed reactors are usually used for selective hydrogenation to remove such impurities. For example, the selective hydrogenation of acetylene can be carried out in isothermal or adiabatic fixed-bed reactors us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/06C07C11/06C07C9/10C07C9/12C07C7/163C07C7/167
CPCY02P20/10Y02P20/52
Inventor 刘小波蒋海斌鲁树亮张晓红戴伟乔金樑彭晖乐毅王育
Owner CHINA PETROLEUM & CHEM CORP
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