Selective hydrogenation method for pyrolysis gasoline

A pyrolysis gasoline, selective technology, applied in chemical instruments and methods, processing hydrocarbon oil, petroleum industry, etc., can solve problems such as selective hydrogenation of difficult whole-distillation pyrolysis gasoline

Active Publication Date: 2019-02-22
陈雅菁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN200610029962.5 relates to a method for selective hydrogenation of full-run pyrolysis gasoline, which mainly solves the technical probl

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0021] Example 1

[0022] 1. Preparation of nickel-doped lanthanum ferrite

[0023] Under stirring conditions, dissolve 2.51 mol of lanthanum nitrate in 120 mL of water, add citric acid and stir to dissolve; then add 4.79 mol of ferric nitrate, then add 190 g of sodium polyacrylate, and then add an aqueous solution containing 42 g of nickel nitrate, continue stirring for 30 min, and then bake After drying, roasting and grinding, nickel-doped lanthanum ferrite is obtained.

[0024] 2. Preparation of silica-alumina support

[0025] 4.5g of nickel-doped lanthanum ferrite was added with citric acid for later use. 300 g of pseudo-boehmite powder and 25.0 g of succulent powder are added to the kneader, nitric acid is added, 40.2 g of sodium polyacrylate nitric acid solution is added, and the mixture is uniformly mixed, and then nickel-doped lanthanum ferrite is added, and the mixture is uniform to obtain Alumina precursor. 5g of sodium polyacrylate is dissolved in nitric acid, t...

Example Embodiment

[0028] Example 2

[0029] The preparation of nickel-doped lanthanum ferrite is the same as that of Example 1, except that 260 g of sodium polyacrylate is added. The preparation of the silica-alumina carrier is the same as that of Example 1. % nickel-doped lanthanum ferrite, 1.2 wt% magnesium, support mesopores account for 64.2% of the total pores, and macropores account for 25.6% of the total pores. The unit content of sodium polyacrylate in the alumina precursor is 3 times higher than the content of sodium polyacrylate in the silicon source-organic polymer mixture. The preparation method of catalyst 2 is the same as that of embodiment 1, and the amount of palladium is 0.35wt%.

Example Embodiment

[0030] Example 3

[0031] The preparation of nickel-doped lanthanum ferrite is the same as that of Example 1, except that 220 g of polyacrylic acid is added. The preparation of the silica-alumina carrier is the same as that of Example 1. The nickel-doped lanthanum ferrite, 2.1 wt% magnesium, the support mesopores accounted for 54.6% of the total pores, and the macropores accounted for 33.5% of the total pores. The unit content of polyacrylic acid in the alumina precursor was 3.3 times higher than that in the silicon source-organic polymer mixture. The preparation method of catalyst 3 is the same as that of Example 1, and the amount of palladium is 0.21 wt%.

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Abstract

The invention relates to a selective hydrogenation method for pyrolysis gasoline. A catalyst comprises a silicon oxide-aluminum oxide carrier and a metal active component palladium loaded to the carrier. Palladium accounts for 0.15-0.45wt% of the total weight of the catalyst. The silicon oxide-aluminum oxide carrier comprises 0.1-12wt% of silicon oxide, 0.1-10wt% of nickel doped lanthanum ferriteand 0.05-7.8wt% of magnesium. The hydrogenation process conditions are as follows: the reaction inlet temperature is lower than or equal to 45 DEG C, the reaction pressure is 2.5-4.5 MPa, the hydrogenoil volume ratio is 60-450, and the liquid volume airspeed is 3.0-5.5h<-1>. The catalyst is good in colloid resistance and high in arsenic, sulfur and water resistance.

Description

technical field [0001] The invention relates to a method 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, monoolefins, diolefins, linear alkanes, naphthenes, and organic compounds of nitrogen, sulfur, oxygen, chlorine and heavy metals, etc., totaling more than 200 components, of which Benzene, toluene, xylene (collectively referred to as BTX) about 50-90%, unsaturated hydrocarbons 25-30%. According to the characteristics that pyrolysis gasoline contains a large amount of aromatic hydrocarbons, it has a wide range of uses. It can not only be used as a blending component of gasoline to produce gasoline with high octane number, but also can be separated to produce aromatic hydrocarbons. [0003] Due ...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10G45/06
CPCB01J23/002B01J23/83B01J2523/00C10G45/06C10G2300/202B01J2523/22B01J2523/3706B01J2523/842B01J2523/847
Inventor 陈新忠陈明海施清彩庄旭森
Owner 陈雅菁
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