Catalyst for removing traces of oxygen in catalytic cracking dry gas

A catalytic cracking and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical change purification/separation, etc. Can not use FCC dry gas deoxidation process and other problems to achieve the effect of easy operation, not easy to fly over temperature, and strong anti-poisoning ability

Active Publication Date: 2010-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above-mentioned deoxidation catalyst cannot be used in the deoxidation refining process of mixed gas with high olefin content, and it cannot be used in the FCC dry gas deoxygenation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] made by the rolling ball method θ-Al 2 o 3 200 g of balls were impregnated with 300 ml of 5% KOH solution for 20 minutes, then dried in a drying oven at 200° C. for 4 hours, and set aside. 1.62g AgNO 3 Prepare 300ml aqueous solution, take spare θ-Al 2 o 3 The ball was immersed in this solution for 20 minutes, then poured off the excess liquid, placed in a drying oven at 180°C, dried for 8 hours and then cooled to room temperature. Take 0.382g PdCl 2 Make a solution with HCl, then adjust the pH value of the solution to 2.5, adjust the volume to 284ml, and then pour it onto the carrier after the first impregnation, then dry it at 80°C for 12 hours, and then bake it at 450°C for 4 hours. at 150°C with H 2 Reduction for 2 hours, cooled to room temperature, the Pd content is 0.11%, the Ag content is 0.506% active components on the catalyst eggshell-shaped distribution of deoxidation catalyst, wherein the promoter K + The content in the carrier is 1.04%.

[0026] Pa...

Embodiment 2

[0028] made by the rolling ball method θ-Al 2 o 3 100 g of balls were soaked with 150 ml of 5% KOH solution for 10 minutes, then dried in a drying oven at 180° C. for 4 hours, and set aside. 2.1g Cr(NO 3 ) 3 .9H 2O is prepared into 150ml aqueous solution, and the θ-Al 2 o 3 The balls were immersed in this solution for 30 minutes, then poured off the excess liquid, placed in a drying oven at 100°C, dried for 8 hours and then cooled to room temperature. Take 0.2gPdCl 2 Make a solution, adjust the pH value of the solution to 2.5, adjust the volume to 142ml, then pour it onto the carrier after the first impregnation, and then dry it at 100°C for 12 hours, bake it at 450°C for 4 hours, and then bake it at 150°C H 2 Reduction for 2 hours, cooled to room temperature, the Pd content is 0.109%, and the Cr content is 0.26%. The active component is an eggshell-shaped distribution of deoxidation catalyst on the catalyst, wherein the auxiliary agent K + The content in the carrie...

Embodiment 3

[0031] made by the rolling ball method θ-Al 2 o 3 40 g of balls were impregnated with 60 ml of 5% NaOH solution for 10 minutes, then dried in a drying oven at 180° C. for 4 hours, and set aside. 0.72g Co(NO 3 ) 2 .6H 2 O is prepared into 60ml aqueous solution, and the θ-Al 2 o 3 The balls were immersed in this solution for 30 minutes, then poured off the excess liquid, placed in a drying oven at 120°C, dried for 12 hours and then cooled to room temperature. Take 0.13gPdCl 2 Make a solution, adjust the pH value of the solution to 1.5, adjust the volume to 56ml, and then pour it onto the carrier after the first impregnation, and then dry it at 180°C for 12 hours, bake it at 450°C for 6 hours, and then bake it at 150°C H 2 Reduction for 4 hours, cooled to room temperature, the Pd content is 0.18%, the Co content is 0.35%, the active component is the deoxygenation catalyst with eggshell distribution on the catalyst, wherein the promoter Na + The content in the carrier i...

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PUM

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Abstract

The invention provides a catalyst for removing traces of oxygen in catalytic cracking dry gas, which is characterized in that the catalyst contains catalytic active components and a carrier, wherein the catalytic active components consist of main catalytic active components and auxiliary catalytic active components; the main catalytic active components are palladium; based on the weight of the catalyst, the palladium content is 0.01 to 0.5 percent; the auxiliary catalytic active components are one or more of Ag, Au, Co and Cr; the content of the auxiliary catalytic active components is 0.05 to 1.0 percent; the carrier is alumina, activated carbon, silica or zeolite; and the catalytic active components are distributed in an eggshell-like state on the surface of the carrier. The catalyst has the deoxidation depth up to 0.1 ppm at high space velocity, and has the characteristics of strong anti-poisoning capability, reaction bed insusceptible to temperature runaway, and the like.

Description

technical field [0001] The invention relates to gas purification technology, and more specifically to a catalyst for removing trace oxygen from catalytic cracking dry gas. Background technique [0002] With the development of the chemical industry, the purification of industrial gases has increasingly become a research topic that must be solved, and the deoxygenation of various gases is a common purification technology. [0003] As we all know, the secondary processing capacity of catalytic cracking (FCC) in my country's oil refining industry accounts for a large proportion. Containing 12% to 19% (volume fraction) of ethylene, most refineries use catalytic cracking dry gas as fuel gas or burn it with a torch, resulting in waste of resources and environmental pollution. The amount of ethylene in the dry gas is quite considerable. If it can be recovered, it can improve the competitiveness of refineries and ease the contradiction between supply and demand of ethylene. Extractin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58B01J23/50B01J23/44B01J23/89B01J23/60B01D53/14C07C7/148
Inventor 董明会潘智勇彭颖慕旭宏宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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