Deoxidation catalyst for oil product, preparation method thereof and catalytic hydrogenation method for removing dissolved oxygen in oil product by adopting catalyst

A technology of catalytic hydrogenation and oxygen catalyst, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problem of low oxygen removal efficiency and achieve stable oxygen removal Good performance, high activity, high reactivity

Active Publication Date: 2009-12-30
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are industrial devices that use fractionation tower stripping to remove dissolved oxygen in oil products, but the oxygen removal efficiency is low

Method used

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  • Deoxidation catalyst for oil product, preparation method thereof and catalytic hydrogenation method for removing dissolved oxygen in oil product by adopting catalyst
  • Deoxidation catalyst for oil product, preparation method thereof and catalytic hydrogenation method for removing dissolved oxygen in oil product by adopting catalyst
  • Deoxidation catalyst for oil product, preparation method thereof and catalytic hydrogenation method for removing dissolved oxygen in oil product by adopting catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take pseudo-boehmite powder and roll it into small balls of Φ1.5-2.5mm, dry at 150°C for 6 hours, and bake at 600°C for 4 hours to obtain a specific surface area of ​​210M 2 / g, pore volume 1.4Cm 3 / g γ-Al 2 o 3 Ball carrier.

[0025] The carrier was treated with 0.085N PdCl 2 Solution impregnation, drying at 120°C for 5 hours, and firing at 550°C for 3 hours. Catalyst A was prepared by reducing with hydrogen with a purity greater than 99% at 120° C. for 4 hours. The finished catalyst contains 0.6% palladium by weight.

Embodiment 2

[0027] The carrier among the embodiment 1 is first used the PdCl of 0.085N 2 Solution impregnation, drying at 120°C for 5 hours, and firing at 550°C for 3 hours. The calcined carrier was dechlorinated and treated with 0.5N SnCl 4 Solution impregnation, drying at 120°C for 5 hours, and baking at 550°C for 4 hours. Catalyst B was prepared by reducing with hydrogen with a purity greater than 99% at 120° C. for 4 hours. The finished catalyst contains 0.6% by weight of palladium and 1.2% by weight of tin.

Embodiment 3

[0029] Get pseudo-boehmite powder B preparation method as embodiment 1, make specific surface area 160M 2 / g, pore volume 0.9Cm 3 / g γ-Al 2 o 3 Ball carrier. First use 0.045N PdCl 2 Solution impregnation, drying at 120°C for 4 hours, and firing at 500°C for 2 hours. The calcined support was dechlorinated and treated with 0.8N Pb(NO 3 ) 2 Solution impregnated, dried at 120°C for 4 hours, and baked at 500°C for 4 hours. Catalyst C was prepared by reducing with hydrogen with a purity greater than 99% at 120° C. for 2 hours. The finished catalyst contains 0.1% by weight of palladium and 0.2% by weight of lead.

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Abstract

The invention relates to a deoxidation catalyst for an oil product, a preparation method thereof and a catalytic hydrogenation method for removing dissolved oxygen in the oil product by adopting the catalyst. The deoxidation catalyst for the oil product takes gamma-alumina which has the specific surface area of between 50 and 300m<2>/g and the pore volume of between 0.2 and 2.0cm<3>/g as a carrier, palladium supported on the carrier as a main catalytic element, and one of silver, tin and lead as a co-catalytic element; and the preparation method thereof comprises two steps of the preparation of the alumina carrier and the preparation of the catalyst. The catalytic hydrogenation method for removing the dissolved oxygen in the oil product by adopting the catalyst comprises the following steps that: the oil product is fully mixed with hydrogen before the oil product enters a hydrogenation reactor; and then the mixed oil product enters the reactor and is contacted with the deoxidation catalyst. The catalyst has high strength and good deoxidation stability, can still have higher activity under lower temperature and pressure, can keep higher reaction activity for a long time, and ensure that the removal rate of trace oxygen in the oil product can reach over 90 percent.

Description

technical field [0001] The invention relates to a catalyst and a process for efficiently removing trace oxygen dissolved in oil products. Background technique [0002] In modern industry, oxygen removal has a wide range of applications and is very critical in many industrial fields. Oxygen removal is mainly used in the treatment of boiler water and oil field water and the refining of high-purity gas, propylene, synthesis gas and other gases. The methods of oxygen removal mainly include two categories: physical oxygen removal and chemical oxygen removal. It is divided into chemical absorption (adsorption) deoxygenation, using oxygen to react with activated carbon and other oxygen scavenger to generate carbon dioxide deoxygenation, using variable price oxide reducing agent to remove oxygen, catalytic hydrogenation and deoxygenation, etc. In terms of catalyst hydrogenation and oxygen removal, existing patents such as CN85102710A report a platinum, palladium / titanium oxide deo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B01J23/62B01J37/08B01J37/02B01J37/18C10G45/10
Inventor 许艺王玉凌正国周立群顾文忠
Owner CHINA PETROCHEMICAL CORP
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