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Refinery dry gas acetylene removal catalyst as well as preparation method and application thereof

A technology for refinery dry gas and catalyst, which is applied in catalyst activation/preparation, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc., and can solve the problems of high price, poor hydrogenation selectivity, and easy loss of catalyst active components.

Pending Publication Date: 2021-03-30
SHANDONG JINGBO PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of catalyst has good low-temperature activity and mild reaction conditions, but its disadvantages are that the active components of the catalyst are easily lost, the price is expensive, and the hydrogenation selectivity is slightly poor.

Method used

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  • Refinery dry gas acetylene removal catalyst as well as preparation method and application thereof
  • Refinery dry gas acetylene removal catalyst as well as preparation method and application thereof
  • Refinery dry gas acetylene removal catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0038] The present invention also provides a kind of preparation method of above-mentioned refinery dry gas deacetylation catalyst, comprises the following steps:

[0039] A) The aluminum precursor and the titanium precursor are mixed in a solvent according to the mass fraction ratio, and TiO is obtained after drying and roasting 2 Modified Al 2 o 3 ;

[0040] B) the TiO 2 Modified Al 2 o 3 Equal volume impregnation in impregnation solution, drying and roasting to obtain refinery dry gas deacetylation catalyst;

[0041] The immersion liquid includes Cu 2+ 、Ni 2+ and Ce 4+ .

[0042] In the invention, a titanium precursor and an aluminum precursor are used to prepare a carrier, and then the copper precursor, the nickel precursor and the cerium precursor are loaded on the carrier by an equal-volume impregnation method, and then the catalyst is obtained by roasting.

[0043] Specifically, the present invention prepares catalyst according to the following steps:

[0044...

Embodiment 1

[0074] Weigh 200g of aluminum hydroxide dry glue, 40g of metatitanic acid, 7g of 65wt% concentrated nitric acid, and 140g of deionized water, mix them evenly, extrude into a cylindrical shape of 1-2mm, dry at 120°C for 4h, and roast at 600°C for 3h to obtain Carrier S-1. The water absorption of carrier S-1 was measured to be 55%.

[0075] Prepare 5.5ml of a mixed aqueous solution containing copper nitrate, nickel nitrate and cerium nitrate as the immersion solution, in the immersion solution, the amount of copper nitrate is 5% by weight in terms of copper element, and the amount of nickel nitrate is 1% by weight in terms of nickel element, and Nitric acid is 1% by weight based on cerium element. At room temperature, take 10 g of carrier S-1, impregnate with 5.5 mL of the previously prepared impregnating solution, dry at 110°C for 4 hours, then calcinate at 550°C for 4 hours, take it out and cool to room temperature, and obtain the catalyst C-0 .

Embodiment 2

[0076] Embodiment 2 prepares comparative catalyst

[0077] Carrier S-1 was prepared according to the method of Example 1.

[0078]Prepare 5.5 ml of a mixed aqueous solution containing copper nitrate, cobalt nitrate and cerium nitrate as the immersion solution, in the immersion solution, the amount of copper nitrate is 5% by weight in terms of copper element, and the amount of cobalt nitrate is 1% by weight in terms of cobalt element, and Nitric acid is 1% by weight based on cerium element. At room temperature, 10 g of carrier S-1 was taken, impregnated with 5.5 mL of the previously prepared impregnating solution, dried at 110°C for 4 hours, then calcined at 550°C for 4 hours, taken out and cooled to room temperature, and the catalyst obtained was Comparative C- 0.

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Abstract

The invention provides a refinery dry gas acetylene removal catalyst. The refinery dry gas acetylene removal catalyst comprises 65-90wt% of a carrier, 2-15wt% of a main active component and 1-8wt% ofan auxiliary agent; the carrier is Al2O3 modified by TiO2; the main active ingredients are CuO and NiO; and the auxiliary agent is CeO2. According to the catalyst, NiO and CuO are taken as main activecomponents, CeO2 is taken as an auxiliary component, and the TiO2 modified Al2O3 material is taken as a carrier; meanwhile, the catalyst is mild in application condition, high in activity and selectivity, good in stability and small in olefin loss. The invention also provides a preparation method and application of the refinery dry gas acetylene removal catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a refinery dry gas deacetylation catalyst, its preparation method and application. Background technique [0002] In the petrochemical industry, the heavy oil catalytic cracking process will produce ethylene-rich dry gas, and part of the dry gas will be used as raw material gas for the dry gas to ethylbenzene unit, in which the raw gas contains a large amount of hydrogen, methane, ethane and ethylene, It also contains a small amount of alkyne (0.001-0.02%), CO, oxygen, hydrogen and other impurities. Due to the special carbon structure of the alkyne in the impurity, it is very easy to form carbon deposits on the surface of the catalyst at high temperature, which will lead to The deactivation is fast, which seriously affects the operation cycle of the alkylation reaction, so the removal of alkynes in dry gas is of great significance. [0003] Since the alkyne content ...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J35/10B01J37/02B01D53/86B01D53/72C10L3/10
CPCB01J23/83B01J37/0201B01J23/002C10L3/101B01D53/864B01J2523/00B01D2257/7022B01J35/615B01J35/635B01J35/633B01J2523/17B01J2523/31B01J2523/3712B01J2523/47B01J2523/847
Inventor 王东超侯珂珂郭振莲张凤岐王耀伟栾波
Owner SHANDONG JINGBO PETROCHEM
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