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

A metal trapping agent and catalytic cracking technology, which is applied in the field of metal trapping agents, can solve the problems of zeolite damage, deterioration of product distribution, etc., and achieve the effects of slowing down damage, increasing liquid product yield, and good metal trapping effect

Active Publication Date: 2016-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Experiments have shown that deposition of 1000 μg / g of vanadium on the balancer is sufficient to cause damage to the zeolite and worsen product distribution

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

[0040] The preparation method of the metal trapping agent in the present invention can be carried out with reference to the prior art, and it can be prepared by conventional methods in the field. According to an embodiment of the present invention, the present invention provides a metal trapping agent The preparation method includes:

[0041] (1) The first slurry is obtained by mixing small pore alumina, macro pore alumina, deionized water and acid to prepare slurry;

[0042] (2) Contacting the first slurry with magnesium hydroxide and / or magnesium oxide to obtain a second slurry;

[0043] (3) The second slurry is spray-dried and then roasted;

[0044] Wherein, based on the pore volume of 2-100nm pores, in the macroporous alumina, the pore volume of 2-5nm pores accounts for 20-35%, the pore volume of 5-10nm pores accounts for 25-45%, and the pore volume of 5-10nm pores accounts for 25-45%. The pore volume of the pores accounts for 20-50%; the pore volume of 2-5nm pores in the small p...

preparation Embodiment 1-4

[0096] Preparation Examples 1-4 are used to prepare the precursor of the phosphor-aluminum auxiliary agent of the present invention

preparation Embodiment 1

[0098] 1.25 kg of pseudo-boehmite (including Al 2 O 3 0.76 kg), 0.26 kg of Leytonite (0.2 kg on a dry basis) and 1.57 kg of deionized water for 30 minutes to obtain a slurry. Under stirring, add 1.69 kg of concentrated phosphoric acid to the slurry and increase the temperature to 70°C. After contacting for 45 minutes, the precursor P1 of phosphor-aluminum auxiliary agent was obtained. The material ratio is shown in Table 1.

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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, stepped pores-distributed alumina, and a phosphorus-aluminium assistant, and at least parts of alumina and at least parts of magnesium oxide form a magnesium aluminate spinel structure; the stepped pores-distributed alumina contains macro-porous alumina and micro-porous alumina; in the macro-porous alumina, the volume of pores with the pore volume of 2-5nm is 20-35% of the volume of pores with the pore volume of 2-100nm, the volume of pores with the pore volume of 5-10nm is 25-45% of the volume of pores with the pore volume of 2-100nm, and the volume of pores with the pore volume of 10-60nm is 20-50% of the volume of pores with the pore volume of 2-100nm; and in the micro-porous alumina, the volume of pores with the pore volume of 2-5nm is 50-70% of the volume of pores with the pore volume of 2-100nm, the volume of pores with the pore volume of 5-10nm is 15-30% of the volume of pores with the pore volume of 2-100nm, and the volume of pores with the pore volume of 10-60nm is 10-20% of the volume of pores with the pore volume of 2-100nm. The invention also provides a catalytic cracking method. The metal chelating agent 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 and a method for preparing the metal trapping agent, as well as the 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 method for processing heavy oil in refineries. In order to reduce costs and maximize benefits, it can be processed by deep processing of heavy oil and using inferior oil. to realise. [0003] However, inferior crude oils generally contain high levels of heavy metals (such as vanadium). The vanadium-containing compound in petroleum is a very complex metal complex, generally in the form of porphyrin vanadium and non-porphyrin vanadium. The boiling point of metalloporphyrin is generally between 565-650°C, mainly concentrated in residual oil, but due to its strong volatility, it wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/16C10G11/04
Inventor 朱玉霞陈蓓艳黄志青沈宁元任飞宋海涛蒋文斌
Owner CHINA PETROLEUM & CHEM CORP
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