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A metal trapping agent, its preparation method and application, and a catalytic cracking method

A technology of metal trapping agent and catalytic cracking, which is applied in the field of metal trapping agent, can solve the problems of complex process and inability to implement catalytic cracking device, and achieve the effect of low cost, good metal trapping effect, and slowing down damage

Active Publication Date: 2016-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite the above advantages, the process is complex and cannot be implemented in conventional catalytic cracking units

Method used

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  • A metal trapping agent, its preparation method and application, and a catalytic cracking method
  • A metal trapping agent, its preparation method and application, and a catalytic cracking method
  • A metal trapping agent, its preparation method and application, and a catalytic cracking method

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Embodiment approach

[0031] According to a preferred embodiment of the present invention, the present invention provides a kind of preparation method of metal trapping agent, and this method comprises:

[0032](1) mixing and pulping aluminum hydroxide and / or aluminum oxide, deionized water and acid to obtain the first slurry;

[0033] (2) contacting the first slurry with magnesium hydroxide and / or magnesium oxide to obtain a second slurry, and spray drying the second slurry to obtain a solid;

[0034] (3) Contacting the solid with a water-soluble magnesium source solution, drying or not drying the contacted mixture, and roasting;

[0035] Among them, in order to introduce lanthanide rare earth metal oxides and / or transition metal oxides into the metal trapping agent of the present invention, any of the step (1), step (2) and step (3) of the present invention can be Introduced in one or more steps, that is, any one or more steps in step (1), step (2) and step (3) of the present invention can be in...

Embodiment 1

[0074] This example is used to illustrate the preparation process of the metal scavenger provided by the present invention.

[0075] (1) Pseudoboehmite 280g (according to Al 2 o 3 count), lanthanum carbonate (including La 2 o 3 50 grams) into deionized water, after uniform dispersion, hydrochloric acid was added, and the first slurry was obtained after contacting for 30 minutes. The pH value of the first slurry was measured to be 1.2, and the solid content was 15% by weight;

[0076] (2) Then add deionized water-dispersed MgO slurry (containing MgO600g), the temperature is controlled at 55°C, and the second slurry is obtained after contacting for 60 minutes. The measured pH value of the second slurry is 9.1, and the solid content is 28% by weight ;The second slurry is spray-dried and formed to obtain solid microspheres, wherein the microspheres with a particle diameter in the range of 0-149 microns account for 93% by volume, and the microspheres with a particle diameter in ...

Embodiment 2-8

[0080] Examples 2-8 are used to illustrate the preparation process of the metal-scavenging agent provided by the present invention.

[0081] Metal scavengers A2-A8 were prepared according to the method of Example 1, except that the formula, preparation parameters, bulk density and wear index are listed in Table 2.

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Abstract

The invention provides a metal chelating agent, and a preparation method and an application thereof. The metal chelating agent contains magnesium oxide, alumina, and a lanthanum rare earth metal oxide and / or a transition metal oxide, and at least parts of alumina and at least parts of magnesium oxide form a magnesium aluminate spinel structure, wherein the bulk density of the metal chelating agent is 0.85-1.2g / cm<3>. The invention also provides a catalytic cracking method. The metal chelating agent has a very good metal chelating effect. Compared with metal chelating agents in the prior art, the high-bulk-density metal chelating agent provided by the invention has the advantages of low cost and use convenience. For example, the metal chelating agent provided by the invention can alleviate the destroys of vanadium to a cracking catalyst, improve the yields of liquid products and reduce the yields of dry gas and coke when the metal chelating agent is used in the catalytic cracking of high-vanadium heavy oil.

Description

technical field [0001] The invention relates to a metal trapping agent, a preparation method of the metal trapping agent, an application of the metal trapping agent in catalytic cracking, and a catalytic cracking method. Background technique [0002] The continuous rise of crude oil prices has greatly increased the processing costs of refineries. At present, catalytic cracking is an important means of heavy oil processing in refineries. In order to reduce costs and maximize benefits, heavy oil can be processed through deep processing and low-quality oil. to fulfill. [0003] However, low-quality crude oils are generally higher in heavy metals such as vanadium. The vanadium-containing compounds in petroleum are a kind of very complex metal complexes, which generally exist in the form of porphyrinic vanadium and non-porphyrinic vanadium. The boiling point of metalloporphyrin is generally between 565-650°C, and it is mainly concentrated in residual oil, but because of its str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/10
Inventor 陈蓓艳任飞蒋文斌黄志青宋海涛沈宁元朱玉霞
Owner CHINA PETROLEUM & CHEM CORP