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Non-noble metal Ni-based catalyst, preparation method thereof and method for preparing cyclopentane through cyclopentadiene hydrogenation

A non-precious metal, cyclopentadiene technology, used in metal/metal oxide/metal hydroxide catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of easy deactivation and high cost, and achieve the reuse rate High, high selectivity and yield, reducing the effect of self-agglomeration coke

Pending Publication Date: 2021-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a hydrogenation process for cyclopentadiene that can be used for the cyclopentadiene hydrogenation process in view of the disadvantages of adding solvents and needing to use high cost and easily deactivated noble metal catalysts. A non-noble metal Ni-based catalyst for a hydrogen process and a preparation method thereof and a process for preparing cyclopentane by hydrogenation of cyclopentadiene, the non-noble metal Ni-based catalyst does not need to use noble metals as active components, and is prepared by hydrogenation of cyclopentadiene to prepare cyclopentane In the process of pentane, there is no need to add additional solvent or diluent. Not only that, the catalyst has the advantages of high activity, good selectivity, high reuse rate, and not easy to deactivate. It can also prepare cyclopentadiene by hydrogenation of cyclopentadiene Improving the Yield and Selectivity of Cyclopentane in Alkanes

Method used

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  • Non-noble metal Ni-based catalyst, preparation method thereof and method for preparing cyclopentane through cyclopentadiene hydrogenation
  • Non-noble metal Ni-based catalyst, preparation method thereof and method for preparing cyclopentane through cyclopentadiene hydrogenation
  • Non-noble metal Ni-based catalyst, preparation method thereof and method for preparing cyclopentane through cyclopentadiene hydrogenation

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preparation example Construction

[0031] The present invention provides a kind of preparation method of non-precious metal Ni base catalyst on the other hand, comprises the following steps:

[0032] (1) Ni active metal component precursor, metal additive component precursor and nitrogen-containing organic acid are loaded on the carrier by impregnation method, and catalyst precursor I is obtained after drying;

[0033] (2) pyrolyzing the catalyst precursor I in an inert atmosphere to obtain the catalyst precursor II;

[0034] (3) The catalyst precursor II is contacted with a reducing gas under the reduction reaction condition that the combined nickel is reduced to elemental nickel.

[0035]In the present invention, nitrogen-containing organic acid is added in the loading process of the metal active component and the metal additive component, and firstly pyrolyzed under an inert atmosphere, and then reduced, so that the obtained catalyst can hydrogenate cyclopentadiene In the preparation of cyclopentane, the se...

Embodiment 1

[0075] Preparation of non-noble metal Ni-based catalyst:

[0076] Prepare nickel nitrate (Ni(NO) containing 0.35g Ni 3 ) 2 ) aqueous solution, prepare chromium nitrate (Cr(NO 3 ) 3 ) aqueous solution, mixing the two, and then adding 2.0 g of ethylenediaminetetraacetic acid to obtain 100 mL of impregnating solution, immersing 10 g of mordenite carrier in the above impregnating solution, and evaporating to dryness at 80° C. to obtain catalyst precursor I;

[0077] Catalyst precursor I was pyrolyzed at 450° C. for 12 hours in a nitrogen atmosphere (nitrogen concentration: 30% by volume) to obtain catalyst precursor II;

[0078] The catalyst precursor II was reduced at 400°C for 4 hours in a hydrogen atmosphere (the concentration of hydrogen was 15% by volume), and then the catalyst obtained after reduction was shaped into a clover-shaped catalyst, and the shaped catalyst was dried to obtain the non-noble metal Ni base catalyst.

[0079] After testing, the components in the n...

Embodiment 2

[0093] Preparation of non-noble metal Ni-based catalyst:

[0094] Prepare nickel nitrate (Ni(NO) containing 0.45g Ni 3 ) 2 ) aqueous solution, prepare chromium nitrate (Cr(NO 3 ) 3 ) aqueous solution, mixing the two, and then adding 1.0 g of ethylenediaminetetraacetic acid to obtain 100 mL of impregnating solution, immersing 10 g of mordenite carrier in the above impregnating solution, and evaporating to dryness at 80° C. to obtain catalyst precursor I;

[0095] Catalyst precursor I was pyrolyzed at 550° C. for 24 hours in a nitrogen atmosphere (nitrogen concentration: 30% by volume) to obtain catalyst precursor II;

[0096] The catalyst precursor II was reduced at 350°C for 2 hours in a hydrogen atmosphere (the concentration of hydrogen was 30% by volume), and then the catalyst obtained after reduction was shaped into a clover-shaped catalyst, and the shaped catalyst was dried to obtain the non-noble metal Ni base catalyst. The content of each component of the obtained c...

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Abstract

The present invention relates to the field of cyclopentane preparation, and discloses a non-noble metal Ni-based catalyst, a preparation method thereof, and a method for preparing cyclopentane through cyclopentadiene hydrogenation, the non-noble metal Ni-based catalyst contains a carrier, and a Ni active metal component and a metal auxiliary agent component loaded on the carrier, at least part of the nickel element exists in the form of nickel elementary substance and / or nickel carbide. The catalyst can reduce the self-coalescence coking phenomenon of cyclopentadiene in preparation of cyclopentane through hydrogenation of cyclopentadiene, so that the colloid resistance of the catalyst is improved, and the catalyst has the advantages of high activity, good selectivity, high reuse rate, difficulty in inactivation and the like, and further has the advantages of simple preparation process, low cost and the like. In the process of preparing cyclopentane through cyclopentadiene hydrogenation, no extra solvent or diluent needs to be added, and inactivation is not prone to occurring. In addition, according to the method for preparing cyclopentane through cyclopentadiene hydrogenation, due to the fact that the catalyst is used and matched with a two-stage hydrogenation process, high selectivity and yield are achieved.

Description

technical field [0001] The invention relates to the field of preparation of cyclopentane, in particular to a non-noble metal Ni-based catalyst, a preparation method thereof and a method for preparing cyclopentane by hydrogenating cyclopentadiene. Background technique [0002] As a cycloalkane, cyclopentane has many advantages; for example, among the pentane isomers, cyclopentane has a low thermal conductivity, which can ensure that the foam has good thermal insulation performance; its chemical properties are relatively stable. Meanwhile, cyclopentane can be produced as an alternative to chlorofluorocarbons (CFCs). Since CFC is a substance that seriously damages the ozone layer; and there is no halogen atom that accelerates ozone decomposition in the molecular structure of cyclopentane, the ozone destruction coefficient is zero and does not cause damage to the ozone layer; the greenhouse effect can be ignored. As early as 1993, German household appliances The industry began ...

Claims

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Application Information

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IPC IPC(8): B01J23/86B01J29/26B01J29/18C07C13/10C07C5/03
CPCB01J23/866B01J29/26B01J29/185C07C5/03C07C13/10
Inventor 李安夏金魁刘坤邱旭周从山肖哲王旭
Owner CHINA PETROLEUM & CHEM CORP
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