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Gasoline sweetening method

A technology for sweetening mercaptans and gasoline, applied in chemical instruments and methods, processing hydrocarbon oil, petroleum industry, etc., can solve problems such as catalyst composition and content, complex preparation process, and difficult control of catalyst product quality, and achieve good catalyst selectivity , high sweetening activity and low octane loss

Inactive Publication Date: 2019-02-15
张丽娥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The composition and content of the above-mentioned catalysts are relatively large, the preparation process is complicated, and it is difficult to control the quality of catalyst products produced in large quantities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0023] Under stirring conditions, dissolve 2.51mol lanthanum nitrate in 120mL water, add citric acid and stir to dissolve; then add 4.79mol iron nitrate, then add 190g sodium polyacrylate, then add 42g nickel nitrate aqueous solution, continue stirring for 30min, after drying Drying, roasting and grinding to obtain nickel-doped lanthanum ferrite.

[0024] 2. Preparation of silica-alumina carrier

[0025] Dissolve 5g of sodium polyacrylate in nitric acid, then add 38g of microsilica powder and 50g of pseudoboehmite powder, and stir evenly to obtain a mixture of microsilica powder-pseudoboehmite-sodium polyacrylate (abbreviated silicon-aluminum-organic mixture) , take 1 / 8 of the amount for later use, and add citric acid to 4.5g of nickel-doped lanthanum ferrite for later use. Add 300g of pseudo-boehmite powder and 25.0g of fenugreek powder into the kneader, add nitric acid, then add 40.2g of sodium polyacrylate nitric a...

Embodiment 2

[0029] The preparation of nickel-doped lanthanum ferrite is the same as in Example 1, except that 260g of sodium polyacrylate is added, and the preparation of the silica-alumina carrier is the same as in Example 1. The silica-alumina carrier contains 4.4wt% of silicon oxide, 5.7wt% % nickel-doped lanthanum ferrite, 1.6wt% potassium, carrier mesopores accounted for 64.2% of the total pores, and macropores accounted 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 embodiment 1.

Embodiment 3

[0031] The preparation of nickel-doped lanthanum ferrite is the same as in Example 1, except that 220g of polyacrylic acid is added, and the preparation of the silica-alumina carrier is the same as in Example 1. The silica-alumina carrier contains 8.4wt% of silicon oxide, 2.6wt% Nickel-doped lanthanum ferrite, 0.8wt% potassium, the carrier mesopores account for 54.6% of the total pores, and the macropores account for 33.5% of the total pores. The unit content of polyacrylic acid in the alumina precursor is 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.

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PUM

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Abstract

The invention relates to a gasoline sweetening method. A fixed bed reactor is adopted, and a catalyst comprises a silica-alumina support, metal active components nickel, molybdenum and copper supported on the support and aid phosphorus. Based on the weight of the catalyst, the catalyst comprises 2wt.%-15wt.% of nickel oxide, 2wt.%-18wt.% of molybdenum oxide, 0.1wt.%-2.0wt.% of copper oxide and 0.01wt.%-2.2wt.% of the aid phosphorus. The reaction is conducted under conditions that reaction temperature is 110-220 DEG C, reaction pressure is 1.1-3.5 MPa, gaseous hourly space velocity is 1.2-4.0 h<-1>, and volume ratio of hydrogen to oil is (7-25):1. The catalyst has the characteristics of high sweetening activity, high diolefin hydrogenation selectivity, low octane number loss and strong adaptability to different oil products.

Description

technical field [0001] The invention relates to a method for sweetening gasoline. Background technique [0002] With the increasingly stringent environmental protection regulations, countries around the world have put forward more and more stringent requirements on the quality of petroleum processed products, especially the stricter restrictions on the sulfur content of petroleum processed products. The sulfides contained in light petroleum products are mainly mercaptans (RSH), sulfides (RSR), etc. Among them, mercaptans have the greatest impact on product quality, not only have a foul smell, strong corrosiveness, but also affect Product stability. [0003] US6692635B2 discloses a method for producing gasoline with low sulfur content, in which a new sweetening technology is adopted. This technology feeds the whole distillate gasoline raw material into a selective hydrogenation reactor to make mercaptans react with olefins or diolefins in gasoline to generate high-boiling s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10G45/06
CPCB01J23/002B01J23/83B01J2523/00C10G45/06C10G2300/202C10G2400/02B01J2523/3706B01J2523/842B01J2523/847
Inventor 张丽娥黄志祥张素珍黄凤玉
Owner 张丽娥
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