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Hydrodesulfurization catalyst for zinc-aluminum layered material and preparation method thereof

A technology of hydrodesulfurization and zinc-aluminum layer, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited application of catalytic materials and low specific surface area of ​​zinc oxide-containing materials, etc. Achieve good hydrodesulfurization and olefin reduction performance, reduce hydrothermal treatment process, and achieve uniform dispersion

Active Publication Date: 2020-01-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the specific surface area of ​​zinc oxide-containing materials prepared by conventional preparation methods is low, and the application as a catalytic material is limited

Method used

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  • Hydrodesulfurization catalyst for zinc-aluminum layered material and preparation method thereof
  • Hydrodesulfurization catalyst for zinc-aluminum layered material and preparation method thereof
  • Hydrodesulfurization catalyst for zinc-aluminum layered material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 2.4kg of zinc nitrate in 12L of water to make a solution containing zinc, and dissolve 0.32kg of sodium metaaluminate and 0.40kg of sodium carbonate in 5L of water to make a solution containing aluminum. Divide the zinc-containing solution into 4 equal parts, each 3L. Take 3L zinc-containing solution, control the system temperature to 75°C, add aluminum-containing solution dropwise to it until the pH value reaches 9.4; stop adding aluminum-containing solution dropwise, then add 3L zinc-containing solution dropwise to the mixing system, and continue to drop aluminum-containing solution Titrate until the pH value reaches 9.4; alternately titrate the aluminum-containing solution and the zinc-containing solution until all the zinc-containing solutions are added to the mixing system, and add the aluminum-containing solution dropwise until the pH reaches 9.4. The total titration time is 2 hours. The obtained mixture was aged at 75°C for 4 hours, cooled and washed unt...

Embodiment 2

[0045] Dissolve 1.9kg of zinc chloride in 20L of water to form a zinc-containing solution, and dissolve 0.40kg of sodium metaaluminate and 0.80kg of sodium carbonate in 8.5L of water to form an aluminum-containing solution. Take 8L of zinc-containing solution, control the system temperature at 65°C, add aluminum-containing solution dropwise to it until the pH value reaches 9.1; the remaining zinc-containing solution is divided into 3 equal parts, each 4L. The aluminum-containing solution and the zinc-containing solution are alternately titrated until all the zinc-containing solutions are added to the mixing system, and the aluminum-containing solution is added dropwise until the pH reaches 9.1. The total titration time is 6 hours. The obtained mixture was aged at 76°C for 8 hours, cooled and washed until neutral, and dried in an air atmosphere at 90°C for 10 hours to obtain a zinc-aluminum layered material 2 with the molecular formula Zn 0.67 Al 0.33 (OH) 2.03 (CO 3 ) 0.15...

Embodiment 3

[0052] Dissolve 800g of zinc nitrate in 4L of water to form a zinc-containing solution, and dissolve 120g of sodium metaaluminate and 120g of sodium carbonate in 1.7L of water to form an aluminum-containing solution. Take 2L zinc-containing solution, control the system temperature at 60°C, add aluminum-containing solution dropwise to it until the pH value reaches 9, stop adding the aluminum-containing solution dropwise, add the remaining 2L zinc-containing solution dropwise to the mixing system, and continue to drop the Aluminum solution until the pH value reaches 9, the total titration time is 4h. The obtained mixture was aged at 85°C for 4 hours, cooled and washed until neutral, and dried in an air atmosphere at 120°C for 5 hours to obtain a zinc-aluminum layered material 3 with the molecular formula Zn 0.59 Al 0.63 (OH) 2.44 (CO 3 ) 0.195 ·6H 2 O, the molar ratio of zinc to aluminum is 0.94, and the specific surface area is 260m 2 / g.

[0053] Take 50g of zinc-aluminum...

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Abstract

The invention relates to a hydrodesulfurization catalyst containing a zinc-aluminum layered material. The hydrodesulfurization catalyst comprises 30 to 74wt% of alumina, 4 to 15wt% of a group VIB metal on the basis of oxide, 1.5 to 5wt% of a group VIII metal on the basis of oxide, 20 to 70wt% of a zinc-aluminum layered material prepared through nonconstant pH alternant titration and 0 to 5wt% of phosphorus on the basis of oxide. The hydrodesulfurization modified catalyst prepared from the zinc-aluminum layered material and the alumina material has good hydrodesulfurization and olefin reductioneffects.

Description

technical field [0001] The invention relates to a selective hydrodesulfurization catalyst and a preparation method thereof, in particular to a selective hydrodesulfurization catalyst with a zinc-aluminum layered material as a carrier and a preparation method thereof. Background technique [0002] In recent years, with the rapid increase of the number of motor vehicles in cities in various countries, the air pollution caused by vehicle exhaust emissions has become increasingly serious. Controlling the air quality of large and medium-sized cities has become an urgent need to improve the quality of life of people in various countries and ensure the sustainable development of the national economy. solved problem. [0003] With the implementation of China’s National IV Clean Gasoline Standard on January 1, 2014, the sulfur content in gasoline is required to be reduced to 50 μg / g, and by the end of 2016, China will implement a more stringent National V Clean Gasoline Standard, req...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/236C10G45/08
Inventor 向永生崔彦君高源王廷海吴杰王涛常晓昕李自夏姚文君李景锋刘蕾
Owner PETROCHINA CO LTD
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