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Metal chelating agent, preparation method and application thereof, and 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 that the catalytic cracking unit cannot be implemented and the process is complicated, and achieve the effects of improving metal trapping capacity, low cost, and increasing the yield of liquid products

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Metal chelating agent, preparation method and application thereof, and catalytic cracking method
  • Metal chelating agent, preparation method and application thereof, and catalytic cracking method
  • Metal chelating agent, preparation method and application thereof, and catalytic cracking method

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Embodiment approach

[0032]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:

[0033] (1) mixing and pulping aluminum hydroxide and / or aluminum oxide, deionized water and acid to obtain the first slurry;

[0034] (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;

[0035] (3) Contacting the solid with a water-soluble magnesium source solution, drying or not drying the contacted mixture, and roasting;

[0036] Among them, in order to introduce the phosphorus-aluminum additive into the metal scavenger of the present invention, it can be introduced in any one or more steps of the step (1), step (2) and step (3) of the present invention, that is Any one or more steps in step (1), step (2) and step (3) of the present invention can be carried out in the presence of phospho...

preparation Embodiment 1-4

[0079] Preparation Example 1-4 is used to prepare the phosphorus aluminum auxiliary agent precursor of the present invention

preparation Embodiment 1

[0081] 1.25 kg of pseudoboehmite (containing Al 2 o 3 0.76 kg), 0.26 kg of cumulated clay (0.2 kg on a dry basis) and 1.57 kg of decationized water were beaten for 30 minutes to obtain a slurry, and 1.69 kg of concentrated phosphoric acid was added to the slurry under stirring, and the temperature was raised to 70°C, and then Under contact for 45 minutes, the phosphorus aluminum additive precursor P1 was obtained, and 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, alumina and a phosphorus-aluminum assistant, 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, for example, 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, 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 realise. [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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IPC IPC(8): B01J27/18C10G11/04
Inventor 陈蓓艳任飞黄志青沈宁元朱玉霞宋海涛蒋文斌
Owner CHINA PETROLEUM & CHEM CORP
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