Selective hydrodesulfurization catalyst and preparation method thereof

A hydrogenation catalyst and hydrodesulfurization technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of high octane number loss and achieve octane Small loss of alkane number, good chemical stability and thermal stability, and improved interaction effect

Active Publication Date: 2012-02-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the technical problems of high olefin saturation rate of existing catalysts and high octane number loss in research methods, the present invention provides a selective hydrodesulfurization catalyst with good hydrodesulfurization activity, high selectivity and good stability

Method used

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  • Selective hydrodesulfurization catalyst and preparation method thereof
  • Selective hydrodesulfurization catalyst and preparation method thereof
  • Selective hydrodesulfurization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix and knead pseudo-boehmite, silica sol, nitric acid and water, extrude, dry at 120°C, and bake at 500°C for 4 hours to obtain a composite carrier of silica and alumina; then impregnate 100g of the composite carrier in magnesium nitrate , potassium nitrate and diammonium hydrogen phosphate, aged at 20-30°C for 5h, dried at 120°C, and calcined at 480°C for 5h to prepare a catalyst carrier containing additives magnesium, potassium and phosphorus; finally prepare nitric acid A mixed solution of cobalt and ammonium molybdate, impregnated on a catalyst carrier, aged at 20-30°C for 5h, dried at 120°C, and calcined at 500°C for 4h to obtain 2.5wt% cobalt oxide, 10.3wt% molybdenum oxide, magnesium oxide 4.0wt%, potassium oxide 3.2wt%, phosphorus oxide 2.8wt%, silicon oxide 3.2wt%, alumina 74wt% finished catalyst C1.

Embodiment 2

[0047] The preparation method of the silica and alumina composite carrier is the same as in Example 1. Immerse 100g of composite carrier in a mixed solution of magnesium nitrate, potassium carbonate and ammonium dihydrogen phosphate, age at 20-30°C for 6 hours, dry at 120°C, and roast at 450°C for 6 hours to obtain magnesium, potassium and phosphorus-containing additives catalyst carrier; finally prepare a mixed solution of cobalt nitrate and ammonium molybdate, impregnate it on the catalyst carrier, age at 20-30°C for 5h, dry at 120°C, and roast at 520°C for 4h to obtain 3.0wt% cobalt oxide, Finished catalyst C2 comprising 12 wt% of molybdenum oxide, 5.0 wt% of magnesium oxide, 4.0 wt% of potassium oxide, 2.0 wt% of phosphorus oxide, 4.0 wt% of silicon oxide and 70 wt% of alumina.

Embodiment 3

[0049] Mix and knead pseudo-boehmite, nano-silica (6-100nm particle size), nitric acid and water, extrude, dry at 120°C, and roast at 550°C for 4 hours to obtain a composite carrier of silica and alumina ; then 100g of the composite carrier is immersed in the mixed solution of magnesium nitrate, lithium nitrate and ammonium dihydrogen phosphate, aged at 20-30°C for 5h, dried at 120°C, and calcined at 500°C for 5h to obtain magnesium and potassium additives and phosphorus catalyst carrier; finally prepare a mixed solution of cobalt acetate and ammonium molybdate, impregnate it on the catalyst carrier, age at 20-30°C for 5h, dry at 120°C, and roast at 560°C for 3h to obtain 2.2wt cobalt oxide %, molybdenum oxide 9.7wt%, magnesium oxide 3.5wt%, lithium oxide 3.4wt%, phosphorus oxide 3.2wt%, silicon oxide 3.5wt%, aluminum oxide 74.5wt% finished catalyst C3.

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Abstract

The invention relates to a selective hydrodesulfurization catalyst contains cobalt and molybdenum as active components. The selective hydrodesulfurization catalyst is characterized in that silicon oxide and aluminum oxide are used as carriers of the catalyst; based on the total weight of 100%, the catalyst comprises 2-6wt% of cobalt oxide, 9-15 wt% of molybdenum oxide, 2-8wt% of alkaline earth metal oxide, 2-6wt% of phosphorus oxide, 3-5wt% of alkali metal oxide, 2-6wt% of silicon oxide and 54-80 wt% of aluminum oxide; and the catalyst has the specific surface area of 200-300m<2>/g and the pore volume of 0.5-0.7mL/g. The catalyst has high hydrogenation activity and selectivity, good stability, low research octane number loss and high liquid yield. The catalyst is suitable for selective hydrodesulfrization of low-quality gasoline and is particularly suitable for selective hydrodesulfrization of low-quality FCC (Family Car China) gasoline.

Description

technical field [0001] The invention relates to a selective hydrodesulfurization catalyst and a preparation method thereof. The catalyst is suitable for selective hydrodesulfurization of inferior gasoline, especially for selective hydrodesulfurization of inferior FCC gasoline. Background technique [0002] In recent years, with the continuous enhancement of people's awareness of environmental protection, the air pollution caused by vehicle exhaust emissions has become the focus of attention. In order to reduce the emissions of SOx and NOx, countries all over the world have established strict gasoline standards. In 2005, Europe has implemented the Euro IV clean gasoline standard, requiring the sulfur content in oil to be reduced to below 50 μg / g. To welcome the 2008 Olympic Games, Beijing fully implemented the National III clean gasoline standard equivalent to Euro III on July 1, 2005, which requires that the sulfur content in gasoline be less than 150 μg / g. From January 1,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C10G45/08
Inventor 钱颖王廷海薛慧峰康宏敏郑云弟王宗宝王云龚光碧常晓昕颉伟梁顺琴吕龙刚吴杰孙利民辛国萍马好文
Owner PETROCHINA CO LTD
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