Method of removing mercaptan of catalytically cracked gasoline

A technology for catalytic cracking gasoline and sweetening of mercaptans, which is applied in chemical instruments and methods, physical/chemical process catalysts, and hydrocarbon oil treatment, etc. It can solve problems such as catalyst composition and content, complex preparation process, and difficult control of catalyst product quality. Achieve the effects of good catalyst selectivity, high sweetening activity and low olefin saturation rate

Active Publication Date: 2019-01-15
宁夏瑞科新源环保科技研发有限公司
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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 pr...

Method used

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  • Method of removing mercaptan of catalytically cracked gasoline
  • Method of removing mercaptan of catalytically cracked gasoline

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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Abstract

The invention relates to a method of removing mercaptan of catalytically cracked gasoline. According to the method, a fixed bed reactor is adopted; a catalyst comprises a silicon oxide-aluminum oxidecarrier, metal active components (nickel, molybdenum, and iron) loaded on the carrier, and an auxiliary agent (phosphorus); nickel oxide accounts for 2 to 15 wt% of the catalyst, molybdenum oxide accounts for 2 to 18 wt% of the catalyst, iron oxide accounts for 0.1 to 5.5 wt% of the catalyst, the auxiliary agent (phosphorus oxide) accounts for 0.01 to 2.2 wt% of the catalyst, the silicon oxide-aluminum oxide carrier accounts for 65 to 85 wt% of the catalyst, the micro pores, mesopores, macro pores are unevenly distributed in the carrier; the reaction temperature is 110 to 220 DEG C, the reaction pressure is 1.1 to 4.5 MPa, the volume air speed is 1.2 to 5.0 h<-1>, and the volume ratio of hydrogen to oil is 7-25:1. The catalyst has the characteristics of high mercaptan removing activity, high selectivity of diolefin hydrogenation, few side reactions, and low octane value loss.

Description

technical field [0001] The invention relates to a method for catalytically cracking gasoline to remove mercaptans and dienes. 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 diol...

Claims

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Application Information

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IPC IPC(8): C10G45/08C10G45/38C10G49/04B01J27/19
CPCB01J27/19C10G45/08C10G45/38C10G49/04C10G2300/1037C10G2300/104C10G2300/1044C10G2300/202C10G2300/70
Inventor 黄志祥黄凤玉张丽娥张素珍
Owner 宁夏瑞科新源环保科技研发有限公司
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