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Metal trap and catalytic cracking method

A metal trapping agent and catalytic cracking technology, applied in the field of metal trapping agents, can solve the problems of deteriorating product distribution, zeolite damage, etc., and achieve the effects of improving the yield of liquid products, slowing down damage, and reducing the yield of dry gas and coke

Active Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Metal trap and catalytic cracking method
  • Metal trap and catalytic cracking method
  • Metal trap and catalytic cracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This example is used to illustrate the preparation process of the metal scavenger provided by the present invention.

[0067] (1) Add small-pore alumina A into deionized water, and after uniform dispersion, add hydrochloric acid, and obtain the first slurry after contacting for 30 minutes. The pH value of the first slurry is 1.1, and the solid content of the slurry is 15% by weight;

[0068] (2) Then add deionized water-dispersed MgO slurry (containing MgO750g) to the first slurry, and control the temperature at 55°C for 60 minutes to obtain the second slurry, the pH of the second slurry is 9.6, The solid content is 28% by weight;

[0069] (3) Then add macroporous alumina to the second slurry to obtain the third slurry, and contact at 10-40°C for 15 minutes;

[0070] (4) After the third slurry is spray-dried and shaped, it is directly calcined at 550°C / 2h to obtain a solid;

[0071] (5) At room temperature (10-40°C), contact 920g of the solid with 0.35L of a water-sol...

Embodiment 2-8

[0075] Examples 2-8 are used to illustrate the preparation process of the metal scavengers provided by the present invention.

[0076] Metal scavengers A2-A8 were prepared according to the method of Example 1, except that the formula, preparation parameters and wear index are listed in Table 2.

Embodiment 9

[0111] Example 9 is used to illustrate the heavy metal pollution method of the mixture of metal trapping agent and industrial cracking catalyst and the catalytic cracking performance of the metal trapping agent of the present invention for catalytic cracking.

[0112] First analyze the solid content of the industrial cracking catalyst C and the metal trapping agent A1 provided by the present invention, then physically mix with dry basis to obtain the catalyst mixture, and the catalyst mixture is first subjected to cycle pollution (to deposit Ni and V) on the cycle aging device, The theoretical amount of Ni and V on the catalyst mixture after the cycle pollution (that is, the calculated content, there will be some errors in reality, but it does not affect the results of the present invention) is shown in Table 6, wherein,

[0113] The recycling pollution step includes: the catalyst mixture introduces heavy metals (Ni and After V), the catalyst mixture introduced with heavy meta...

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Abstract

The invention provides a metal trapping agent and a catalytic cracking method. The metal trapping agent is prepared according to the following steps: (1) mixing small-pore alumina, deionized water and acid to obtain the first slurry; (2) ) contacting the first slurry with magnesium hydroxide and / or magnesium oxide to obtain a second slurry; (3) contacting the second slurry with macroporous alumina to obtain a third slurry; (4) contacting the third Roasting the slurry after spray drying to obtain a solid; (5) contacting the solid with a water-soluble magnesium source solution, drying or not drying the contacted mixture, and then roasting. The metal trapping agent of the present invention has a very good metal trapping effect, and the metal trapping agent provided by the present invention is used in the catalytic cracking of high vanadium heavy oil, which can slow down the damage of vanadium to the cracking catalyst, increase the yield of liquid products, and reduce dryness. Gas and coke yield.

Description

technical field [0001] The invention relates to a metal trapping agent 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 strong volatility, it will also enter the catalytic cracking fraction. Non-porphyrin metal compounds may be compounds w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J33/00C10G11/00
Inventor 陈蓓艳陈辉沈宁元蒋文斌任飞宋海涛朱玉霞黄志青
Owner CHINA PETROLEUM & CHEM CORP
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