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Diene selective hydrogenation catalyst and preparation method

A hydrogenation catalyst and catalyst technology, applied in the field of selective hydrogenation of diolefins in pyrolysis gasoline and FCC gasoline fractions, can solve the problems of high reaction temperature, activity, selectivity and stability to be improved, and achieve raw material applicability Strong, good low temperature activity, high hydrogenation activity and hydrogenation selectivity effect

Inactive Publication Date: 2012-08-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, nickel-based selective hydrogenation catalysts still have the problems of high reaction temperature, activity, selectivity and stability.

Method used

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  • Diene selective hydrogenation catalyst and preparation method
  • Diene selective hydrogenation catalyst and preparation method
  • Diene selective hydrogenation catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Pseudoboehmite, lithium nitrate solution, nitric acid and water were mixed and kneaded, extruded, dried at 120°C for 6 hours, and calcined at 900°C for 5 hours to obtain the catalyst carrier Z A . Prepare the mixed impregnation solution of nickel nitrate, zinc nitrate, ammonium molybdate, lanthanum nitrate, EDTA, triethylene glycol, wherein the molar ratio of EDTA, triethylene glycol and active component nickel is 1:5, and then Adjust the pH value of the impregnating solution to 4, impregnate in 100gZ AOn the carrier, aging for 12 hours, drying at 120°C, and roasting at 400°C for 4 hours, the finished product containing nickel oxide 12wt%, lithium oxide 1.0wt%, zinc oxide 3.0wt%, molybdenum oxide 3.0wt%, lanthanum oxide 3.0wt% Catalyst C1.

Embodiment 2

[0039] Pseudo-boehmite, nitric acid and water were mixed and kneaded, extruded, dried at 120°C for 6 hours, and calcined at 950°C for 5 hours to obtain the catalyst carrier Z B . Prepare a mixed impregnation solution of nickel nitrate, potassium nitrate, cadmium nitrate, ammonium molybdate, cerium nitrate, and triethylene glycol, wherein the molar ratio of triethylene glycol to the active component nickel is 1:7, adjust the impregnation Liquid pH value to 3, impregnated in 100gZ B On the carrier, aging for 12h, drying at 120°C, and roasting at 450°C for 4h, the finished product containing 13wt% of nickel oxide, 1.6wt% of potassium oxide, 3.0wt% of cadmium oxide, 2.5wt% of molybdenum oxide and 3.0wt% of cerium oxide was obtained Catalyst C2.

Embodiment 3

[0041] The carrier preparation method is the same as in Example 2. Prepare a mixed impregnation solution of nickel nitrate, lithium nitrate, potassium nitrate, copper nitrate, ammonium metatungstate, lanthanum nitrate, and citric acid, wherein the molar ratio of citric acid to the active component nickel is 1:8, and adjust the pH value of the impregnation solution to 4, impregnated in 100gZ B on the carrier, aged for 12 hours, dried at 120°C, and calcined at 400°C for 4 hours to obtain 14.5wt% nickel oxide, 1.0wt% lithium oxide, 1.5wt% potassium oxide, 2.5wt% copper oxide, 3.5wt% tungsten oxide, Lanthanum oxide 3.5wt% finished catalyst C3.

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Abstract

The invention discloses a diene selective hydrogenation catalyst, wherein alumina or modified alumina serves as a carrier, nickel serves as an active component, and alkali metals or alkaline earth metals, VIB metals, X metals and rare earth metals serve as auxiliaries; and when the total weight of the catalyst is metered by 100% in weight percentage, the catalyst contains 10% to 20% of nickel oxide, 0.5% to 5% of the alkali metals and / or the alkaline earth metals, 1% to 7% of oxide of VIB elements, 0.5%to 5% of oxide of auxiliary X metal elements and 2% to 5% of oxide of rare earth elements, wherein the X metals is one or more out of cadmium, zinc, copper and silver. The catalyst has very high hydrogenation activity and selectively under a relatively low temperature, is good in stability, and is mainly applicable to diene selective hydrogenation reaction of pyrolysis gasoline and FCC gasoline.

Description

technical field [0001] The invention relates to a nickel-based catalyst for selective hydrogenation of diolefins and a preparation method thereof. The catalyst is mainly suitable for the selective hydrogenation reaction of diolefins in oil products, especially for the selective hydrogenation of diolefins in pyrolysis gasoline and FCC gasoline fractions. hydrogen. Background technique [0002] Pyrolysis gasoline and FCC gasoline contain a large amount of highly unsaturated hydrocarbons, such as diolefins, styrene, etc. These substances are very easy to undergo polymerization at high temperatures to form oligomers and gums, which affect the stability of oil products and also During the post-treatment process, the polymerized raw rubber will accumulate on the inner and outer surfaces of the catalyst, block the pores of the catalyst, and cover the active center of the catalyst, resulting in rapid deactivation of the catalyst and shortening the service life of the catalyst. Ther...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J23/888B01J23/89B01J23/86C10G45/38C10G45/36
Inventor 梁顺琴王宗宝王廷海吕龙刚郑云弟钱颖孙利民吴杰康宏敏马好文常晓昕颉伟蒋彩兰滕彩梅黄德华林宏向永生
Owner PETROCHINA CO LTD
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