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Modified hydrodesulfurization catalyst and preparation method and application of modified hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, which is applied in the production of clean gasoline hydrofining catalyst and its preparation, can solve the problems of low desulfurization rate, difficult process and large-scale preparation, etc., to maintain octane number, reduce sulfur content, and improve dispersion Effect

Inactive Publication Date: 2018-06-29
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has balanced hydrodesulfurization, olefin reduction, and octane number preservation performance, but the desulfurization rate is not high, and the modified metal needs to be ion-exchanged after the preparation of molecular sieves. The process is complicated and difficult to produce in large quantities.
[0009] However, in the prior art described in the above patent documents, many modifying elements Ce, Mg, B, P, etc. applied to hydrodesulfurization catalysts have been widely studied and achieved good results, while in the catalytic field such as denitrification The well-studied elements such as Pr and Sn are less reported on the application of hydrogenation upgrading catalysts

Method used

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preparation example Construction

[0034] The present invention relates to a preparation method of a modified hydrodesulfurization catalyst, and the specific steps may be:

[0035] Preparation of catalyst support: Al 2 o 3 , SiO 2 、TiO 2 One or more of the group consisting of MgO and MgO is prepared by sol-gel method, co-precipitation method or mechanical mixing method to prepare catalyst carrier powder, and extruding the catalyst carrier powder;

[0036] For example, the step of preparing catalyst carrier powder by sol-gel method is (wherein the carrier is made of Al 2 o 3 example):

[0037] Take 0.5mol / L of Al(NO 3 ) 3 9H 2 O solution and citric acid were mixed and dissolved at a molar ratio of 2:1, ammonia solution was added dropwise to adjust the pH value of the solution to 1, and a light yellow transparent solution was obtained, which was aged in a water bath at 70°C for 2 hours, then placed in a vacuum drying oven at 120°C Dry at constant temperature for 12 hours to obtain dry gel, then place the d...

Embodiment 1

[0050] Preparation of Al by Sol-Gel Method 2 o 3 Carrier, the modified element is selected as Pr, which is mixed in the process of preparing carrier powder, Pr 6 o 11 The mass fraction of the catalyst is 4wt%.

[0051] Take 500mL of analytically pure 0.5mol / L Al(NO 3 ) 3 9H 2 O and citric acid were mixed and dissolved at a molar ratio of 2:1, and 3 mol / L ammonia solution was added dropwise to adjust the pH value of the solution to 1, and a light yellow transparent solution was obtained, which was designated as solution A. 0.4mol / L Pr(NO 3 ) 3 The solution (praseodymium oxide is heated and dissolved in nitric acid) is recorded as solution B. After mixing 392mL A and 8mL B solution for 1h, put it in a water bath at 70°C for 2h aging, then put it in a vacuum drying oven, and dry it at a constant temperature of 120°C for 12h to obtain dry Gel, and then put the dried gel in a muffle furnace and bake it at 800°C for 4 hours, and grind it into powder to obtain Pr with a Pr el...

Embodiment 2

[0054] Preparation of Al by Sol-Gel Method 2 o 3 Carrier, select the modifying element as Pr, Pr 6 o 11 The mass fraction of the catalyst is 4wt%, and the difference is that the carrier powder is impregnated and modified after the carrier powder is prepared.

[0055] Take 500mL of analytically pure 0.5mol / L Al(NO 3 ) 3 9H 2 O solution and citric acid were mixed and dissolved at a molar ratio of 2:1, and 3mol / L ammonia solution was added dropwise to adjust the pH of the solution to 1 to obtain a light yellow transparent solution, which was aged in a water bath at 70°C for 2 hours, and then placed in a vacuum drying oven. Inside, dry at 120°C for 12 hours to obtain dry gel, then place the dry gel in a muffle furnace to roast at 800°C for 4 hours, and grind it into powder to obtain Al 2 o 3 carrier. 40mL0.4mol / L Pr(NO 3 ) 3 Solution (praseodymium oxide heated and dissolved in nitric acid) impregnated with 50g Al 2 o 3 The carrier was then placed in an oven at 120°C fo...

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Abstract

The invention discloses a modified hydrodesulfurization catalyst and a preparation method and the application of the modified hydrodesulfurization catalyst. The active component of the catalyst is oneor more of groups of metals cobalt, molybdenum, nickel and tungsten, a carrier is one or more of groups of modified Al2O3, SiO2, TiO2 and MgO, an auxiliary is an alkali metal or alkaline earth metal,wherein the modified element is one or more of groups of Pr, Sn, Bi and Sb. The catalyst fully inhibits olefine hydrogenation produced by the side reaction, maintains the octane number, and fully reduces the sulfur content in the catalytic gasoline subjected to hydrodesulfurization.

Description

technical field [0001] The invention relates to a catalyst for producing clean gasoline hydrofinishing in the field of petroleum processing and a preparation method thereof, especially for selective hydrodesulfurization of catalytic cracking gasoline. Background technique [0002] Energy and environment are the basic conditions for the survival of human beings, and they are two major issues of sustainable development in the world today. With the growth of the world's population and the improvement of living standards, the degree of energy extraction and utilization is getting higher and higher, and the scale is getting bigger and bigger. The consumption of energy is increasing rapidly, and the impact and pressure on the environment have reached an unprecedented level. [0003] Since the mastery of petrochemical catalytic technology represented by catalytic cracking of crude oil and catalyst reforming, the exploitation and utilization of fossil fuels have been increasing. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C10G45/08
CPCB01J23/002B01J23/8871B01J23/8875B01J23/8876B01J2523/00C10G45/08C10G2300/70C10G2400/02B01J2523/31B01J2523/68B01J2523/845B01J2523/13B01J2523/3718B01J2523/43B01J2523/53B01J2523/54
Inventor 张然兰玲葛少辉鞠雅娜钟海军吕忠武李阳姜增坤李天舒冯琪
Owner PETROCHINA CO LTD
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