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Selective hydrogenation catalyst for FCC gasoline and preparation method

A hydrogenation catalyst and selective technology, applied in the direction of selective hydrogenation refining, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of difficult control of catalyst product quality, catalyst composition and High content, complex preparation process and other problems, to achieve the effect of good catalyst selectivity, low olefin saturation rate and high sweetening activity

Active Publication Date: 2019-01-25
林雅娟
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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

[0021] 1. Preparation of nickel-doped lanthanum ferrite

[0022] 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.

[0023] 2. Preparation of silica-alumina carrier

[0024] 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

[0028] 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

[0030] 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 selective hydrogenation catalyst for FCC gasoline. The catalyst comprises a silicon oxide-aluminum oxide carrier and metallic active ingredients nickel, molybdenum, zinc andlithium which are loaded on the carrier; based on the weight of the catalyst, the content of nickel oxide is 2-15wt%, the content of molybdenum oxide is 2-18wt%, the content of zinc oxide is 0.1-5wt%, and the content of lithium oxide is 0.1-2.5wt%; the content of the silicon oxide-aluminum oxide carrier is 65-85wt%. The catalyst has the characteristics of high mercaptan removal activity, high diolefin hydrogenation selectivity and low octane value loss.

Description

technical field [0001] The invention relates to a catalyst for hydrodemercaptanization of FCC gasoline and a preparation method thereof. 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 olef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C10G45/08C10G45/38
CPCB01J23/002B01J23/8873B01J2523/00C10G45/08C10G45/38C10G2300/202C10G2300/305C10G2400/02B01J2523/11B01J2523/27B01J2523/31B01J2523/3706B01J2523/41B01J2523/68B01J2523/842B01J2523/847
Inventor 黄凤玉黄志祥张丽娥张素珍
Owner 林雅娟
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