A kind of pyrolysis gasoline hydrotreating catalyst and its preparation method

A technology for hydrofining and pyrolysis of gasoline, which is applied in the field of oil refining and chemical industry, and can solve the problem of low catalyst hydrogenation activity

Active Publication Date: 2021-06-29
泉州市利泰石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1353168A discloses a catalyst suitable for the second-stage hydrofining of pyrolysis gasoline and its preparation method. The alumina precursor is used to add a high polymer and the IV subgroup metal to obtain a molded carrier after drying and roasting. Immerse in ammonia co-impregnation solution containing Mo, Co, and Ni active components, dry at 100-120°C, and activate at 400-700°C in air to obtain a catalyst, which can adjust the acidity and alkalinity of the carrier and inhibit the coking and deactivation speed of the catalyst. The low specific surface area of ​​the carrier leads to low hydrogenation activity of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Preparation of nickel-doped lanthanum ferrite

[0020] 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.

[0021] 2. Preparation of silica-alumina carrier

[0022] 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

[0026]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, 1.2wt% magnesium, carrier mesopores accounted for 63.8% of the total pores, and macropores accounted for 25.9% 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 Example 1. The content of molybdenum oxide in catalyst 2 is 12.5%, the content of cobalt oxide is 3.8%, the content of nickel oxide is 2.7%, and the content of strontium oxide is 1.9%.

Embodiment 3

[0028] 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% The nickel-doped lanthanum ferrite, 2.1wt% magnesium, the support mesopores accounted for 54.9% of the total pores, and the macropores accounted for 33.1% 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. The content of catalyst 3 is 13.7% molybdenum oxide, 4.1% cobalt oxide, 1.5% nickel oxide and 1.3% strontium oxide.

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Abstract

The invention relates to a pyrolysis gasoline hydrogenation catalyst. The catalyst uses molybdenum, cobalt, nickel, and strontium as active components, and uses silicon oxide-alumina as a carrier. Based on the total weight of the catalyst, the catalyst includes 9-19 wt% of molybdenum oxide , 3.0-8.5wt% cobalt oxide, 0.2-3.5wt% nickel oxide, 0.1-2.0wt% strontium oxide, silica-alumina carrier content of 75-85wt%, micropores, mesopores and macropores in the carrier Uneven distribution. The catalyst has good anti-colloid ability, strong anti-arsenic, anti-sulfur, and strong anti-water ability.

Description

technical field [0001] The invention relates to the field of oil refining and chemical industry, and relates to a pyrolysis gasoline hydrotreating catalyst and a preparation method thereof. Background technique [0002] With the improvement of ethylene production capacity, ethylene by-product pyrolysis gasoline also increases, and pyrolysis gasoline includes C5-C10 fractions. In the prior art, two-stage hydrogenation technology is generally used for the treatment of pyrolysis gasoline fractions. The first stage of pyrolysis gasoline is selective hydrogenation, and the purpose is to generate active components (such as alkynes, diolefins and alkenyl aromatics) therein. Corresponding monoolefins and alkyl aromatics, use noble metal hydrogenation catalysts or non-noble metal Ni-based catalysts to saturate these active unsaturated components in oil products at lower temperatures to reduce coking in the second-stage catalyst bed, thereby To ensure the operating cycle of the devic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887B01J35/04C10G45/08
CPCB01J23/002B01J23/8872B01J35/04B01J2523/00C10G45/08C10G2300/1037B01J2523/22B01J2523/24B01J2523/31B01J2523/3706B01J2523/41B01J2523/68B01J2523/842B01J2523/847
Inventor 庄旭森施清彩陈新忠陈明海
Owner 泉州市利泰石化科技有限公司
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