Catalyst for selective hydrogenation of pyrolysis gasoline and its preparation method

A hydrogenation catalyst and pyrolysis gasoline technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. question

Active Publication Date: 2022-04-01
YANTAI BAICHUAN HUITONG TECH CO LTD
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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 problem in the prior art that it is difficult to selectively hydrogenate full-run pyrolysis gasoline with high colloid and free water content

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] Add citric acid to 4.5 g of nickel-doped lanthanum ferrite for later use. Add 300g of pseudo-boehmite powder and 25.0g of fenugreek powder into a kneader, add nitric acid, then add 40.2g of sodium polyacrylate nitric acid solution, and mix well, then add nickel-doped lanthanum ferrite, mix well, and get Alumina precursor. 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-sodiu...

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 that of Example 1, and the amount of palladium is 0.35wt%.

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, and the amount of palladium is 0.21wt%.

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Abstract

The invention relates to a catalyst for selective hydrogenation of pyrolysis gasoline. The catalyst comprises a silicon oxide-alumina carrier and a metal active component palladium loaded on the carrier. The content of palladium is 0.15-0.45 wt% based on the total weight of the catalyst. The silica-alumina carrier contains 0.1-12wt% of silicon oxide, 0.1-10wt% of nickel-doped lanthanum ferrite, 0.05-6.8wt% of potassium, and the mesopores of the carrier account for 3-75% of the total pores, and the macropores account for 3-75% of the total pores. 1.5-60% of the total pores. The catalyst has good anti-colloid ability, strong anti-arsenic, anti-sulfur, and strong anti-water ability, especially suitable for the first stage of pyrolysis gasoline 6 -C 8 and C 8 The distillate is selectively hydrogenated.

Description

technical field [0001] The invention relates to a catalyst for selective hydrogenation of pyrolysis gasoline and a preparation method thereof. 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, mono-olefins, di-olefins, straight-chain alkanes, cycloalkanes, and organic compounds of nitrogen, sulfur, oxygen, chlorine and heavy metals, etc., a total of more than 200 components, of which Benzene, toluene, and xylene (collectively referred to as BTX) are about 50-90%, and unsaturated hydrocarbons are 25-30%. According to the characteristics of a large amount of aromatics in pyrolysis gasoline, it has a wide range of uses. It can be used as a blending component of gasoline to produce high-octane gasoline, and it can also be used to produce aromatics through separat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C10G45/10
CPCC10G45/10B01J23/002B01J23/8946B01J2523/00C10G2300/202B01J2523/11B01J2523/3706B01J2523/847B01J2523/842B01J2523/824
Inventor 施清彩陈新忠陈明海庄旭森
Owner YANTAI BAICHUAN HUITONG TECH CO LTD
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