A method for one-stage selective hydrogenation of pyrolysis gasoline

A pyrolysis gasoline and selective technology, which is applied in the field of selective hydrogenation, can solve the problems of selective hydrogenation of difficult-to-full-distillate pyrolysis gasoline, inability to realize controllable adjustment of macropore-mesoporous pore diameter, etc., so as to improve the hydrogenation selection of diene. The effect of high stability, strong coking inhibition ability and low price
CN107057757BInactive Publication Date: 2018-10-02QINZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINZHOU UNIV
Publication Date
2018-10-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a one-stage selective hydrogenation method of pyrolysis gasoline. The pyrolysis gasoline is a C6-C8 fraction. The catalyst includes an alumina carrier with a macroporous structure and active metal components nickel, tungsten and nickel oxide loaded on the carrier. The content of tungsten oxide is 12-22wt% based on the total weight of the catalyst. The content of tungsten oxide is 1.5-8wt% based on the total weight of the catalyst. Hydrogenation reaction process conditions: reaction inlet temperature 60-100℃, reaction pressure 2.0-3.5MPa , hydrogen-to-oil volume ratio is 60-180; liquid volume space velocity is 3.0-5.5h-1. The catalyst has better colloid-holding capacity, strong resistance to arsenic, sulfur resistance and coking inhibition. It has strong adaptability to pyrolysis gasoline raw materials with different arsenic and sulfur contents.
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Description

technical field

[0001] The invention relates to a selective hydrogenation method for petroleum hydrocarbon products, especially suitable for one-stage selective hydrogenation of pyrolysis gasoline. Background technique

[0002] Pyrolysis gasoline is an important by-product of steam cracking industrial production of ethylene and propylene, including C5-C10 fractions. The composition of pyrolysis gasoline is very complex, mainly including benzene, toluene, xylene, mono-olefins, di-olefins, straight-chain alkanes, cycloalkanes, and organic compounds of nitrogen, sulfur, oxygen, chlorine and heavy metals, etc., a total of more than 200 components, of which Benzene, toluene, and xylene (collectively referred to as BTX) are about 50-90%, and unsaturated hydrocarbons are 25-30%. According to the characteristics of a large amount of aromatics in pyrolysis gasoline, it has a wide range of uses. It can be used as a blending component of gasoline to produce high-octane gasoline, and i...

Claims

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