Nickle-based catalyst and preparation method and application thereof

A catalyst and nickel-based technology, applied in the field of nickel-based catalysts and their preparation, can solve the problems of high catalyst cost, low pentane yield, catalyst deactivation and the like, and achieve good hydrogenation activity, simple preparation method and high stability Effect

Pending Publication Date: 2019-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the active components of catalysts used for the catalytic hydrogenation of C5 to prepare pentane often contain noble metals such as pd and pt, while the oxygen-containing group impurities in C5 can easily poison Pd, and can even be used in a short period of time. deactivate the catalyst
In addition, due to the high cost of Pd, the cost of the catalyst is high
While there is no catalyst poisoning problem when using non-noble metal catalysts for catalytic hydrogenation, the yield of pentane is low

Method used

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  • Nickle-based catalyst and preparation method and application thereof
  • Nickle-based catalyst and preparation method and application thereof
  • Nickle-based catalyst and preparation method and application thereof

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preparation example Construction

[0026] The method for preparing the catalyst as described in the first aspect of the present invention related to the second aspect of the present invention, it comprises the following steps:

[0027] S1, after impregnating the alumina support with a solution containing rare earth metals, drying and roasting to obtain a modified alumina support modified with rare earth metals;

[0028] S2, after impregnating the rare earth metal-modified alumina carrier in a nickel salt solution, drying and calcining to obtain a nickel-based catalyst.

[0029] In some embodiments of the present invention, in steps S1 and S2, the calcination temperature is 300-800°C; the calcination time is 3-8h.

[0030] In other embodiments of the present invention, in step S2, the pH value of the nickel salt solution is 5-6; the soaking time is 3-5h.

[0031] In some specific embodiments of the present invention, the method for preparing the catalyst as described in the first aspect of the present invention...

Embodiment 1

[0045] Embodiment 1: the preparation of nickel-based catalyst

[0046] (1) Preparation of modified alumina carrier

[0047]Make a solution of appropriate amount of lanthanum oxide and cerium oxide and add it to aluminum glue, heat and stir thoroughly, then filter and extrude, dry at 120°C for 10 hours, and bake at 600°C for 4 hours to obtain A modified alumina support containing 2.0 wt% lanthanum oxide and 1.0 wt% ceria.

[0048] (2) Preparation of nickel-based catalyst

[0049] Add 58.2g of nickel nitrate into 200mL of water, stir and dissolve, adjust its pH value to 5, and form a nickel nitrate solution. 100 g of the modified alumina support was immersed in the above nickel nitrate solution, dried at 120° C. for 6 hours, and then calcined at 600° C. for 5 hours to obtain nickel-based catalyst A. Wherein the content of nickel oxide is 15wt%.

Embodiment 2-9

[0051] Using the same method as in Example 1, nickel-based catalysts B, C, D, E, F, G, H, and I were obtained by changing the content of the active component nickel oxide. The composition of each catalyst is shown in Table 1.

[0052] Table 1: Composition of the nickel-based catalysts obtained in Examples 2-9

[0053] Catalyst number Nickel oxide content wt% Example 2 B 17 Example 3 C 18 Example 4 D 19 Example 5 E 20 Example 6 F 21 Example 7 G 22 Example 8 H 24 Example 9 I 25

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Abstract

The invention relates to the field of catalytic hydrogenation, in particular to a nickle-based catalyst, a preparation method of the nickle-based catalyst and application of the nickle-based catalyst in alkane generation through catalytic hydrogenation of raffinate C5. The nickle-based catalyst comprises a carrier and nickel oxide loaded onto the carrier, wherein the carrier is an aluminium oxide carrier modified by rare earth metal; and the content of the nickel oxide accounts for 15 wt%-25 wt% of the total weight of the catalyst. The provided catalyst has good hydrogenation activity and high stability for a raffinate C5 fraction at low temperature, the pentane yield is above 99%, and the defect that palladium catalyst poisoning is liable to happen before is overcome. Moreover, the preparation method of the catalyst is simple, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the field of catalytic hydrogenation, and in particular relates to a nickel-based catalyst, a preparation method thereof and an application in catalytic hydrogenation of raffinate C5 to generate alkanes. Background technique [0002] The C5 fraction is a by-product of the cracking of petroleum hydrocarbons to produce ethylene. With the rapid development of my country's petrochemical industry, the production capacity of ethylene is increasing year by year, and the available C5 fraction resources are increasing day by day. At present, my country has a certain foundation in the production of aromatics, fuel gas, and petroleum resins with C5 fractions, but this is only the use of diolefins in C5 fractions as fine chemical raw materials. The raffinate C5 from diolefin separation mainly contains monoolefins. Due to various technical and economical reasons, this part of the material is far from being effectively utilized, and most of...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J37/02B01J37/08C07C9/14C07C5/03
CPCB01J23/83B01J23/002B01J37/0207B01J37/088C07C5/03B01J2523/00C07C2523/83B01J2523/3706B01J2523/3712B01J2523/847C07C9/14
Inventor 季静杜周纪玉国熊凯张富春任玉梅龚凤霞
Owner CHINA PETROLEUM & CHEM CORP
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