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Supported amorphous state nickel phosphide catalyst used for light paraffin isomerization and preparation method and using method thereof

A technology of light alkanes and catalysts, which is applied in the field of catalysts for isomerization of light alkanes, can solve the problems of high operating temperature, achieve the effects of avoiding pollution, good stability, and reducing side reactions

Active Publication Date: 2016-06-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] What the present invention aims to solve is the problem that in the prior art, the isomerization catalyst without precious metals has a relatively high service temperature and requires passivation and pre-reduction treatment before use, and then provides a non-precious metal isomerization catalyst suitable for light Isomerization Catalyst for Alkanes

Method used

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  • Supported amorphous state nickel phosphide catalyst used for light paraffin isomerization and preparation method and using method thereof
  • Supported amorphous state nickel phosphide catalyst used for light paraffin isomerization and preparation method and using method thereof
  • Supported amorphous state nickel phosphide catalyst used for light paraffin isomerization and preparation method and using method thereof

Examples

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Effect test

Embodiment 1

[0034] The catalyst for the isomerization of light alkanes described in this example comprises a carrier and nickel phosphide accounting for 5 wt% of the carrier weight, wherein the carrier is composed of alumina and Hβ molecular sieves, and the alumina and The weight ratio of Hβ molecular sieve is 1:3.

[0035] The preparation method of the catalyst for light alkane isomerization described in this embodiment is:

[0036] Calcinate the Hβ molecular sieve at 500°C for 4 hours, then mix 1 weight part of alumina powder with 3 weight parts of the roasted Hβ molecular sieve, add 0.2 weight part of nickel phosphide, mix well and extrude into strips, 50°C After drying, it was ground into particles with a particle size of 0.45 mm, and then the particles were dried at 300° C. for 2 hours under a nitrogen atmosphere to prepare catalyst A1.

[0037]Catalyst A1 prepared in this example was prepared at a reaction temperature of 280°C, a reaction pressure of 1.0 MPa, a hydrogen-to-oil mola...

Embodiment 2

[0039] The catalyst for the isomerization of light alkanes described in this example comprises a carrier and nickel phosphide accounting for 3wt% of the carrier weight, wherein the carrier is composed of alumina and Hβ molecular sieves, and the alumina and The weight ratio of Hβ molecular sieve is 1:9.

[0040] The preparation method of the catalyst for light alkane isomerization described in this embodiment is:

[0041] Calcinate the Hβ molecular sieve at 500°C for 4 hours, then mix 1 weight part of alumina powder with 9 weight parts of the roasted Hβ molecular sieve, add 0.3 weight part of nickel phosphide, mix evenly and extrude into strips at 50°C After drying, it was ground into particles with a particle size of 0.45 mm, and then the particles were calcined at 100° C. under a nitrogen atmosphere for 2 hours to prepare catalyst A2.

[0042] Catalyst A2 prepared in this example was prepared at a reaction temperature of 230°C, a reaction pressure of 2.0 MPa, a hydrogen-to-o...

Embodiment 3

[0044] The catalyst for the isomerization of light alkanes described in this example comprises a carrier and nickel phosphide accounting for 5 wt% of the carrier weight, wherein the carrier is composed of alumina and Hβ molecular sieves, and the alumina and The weight ratio of Hβ molecular sieve is 9:1.

[0045] The preparation method of the catalyst for light alkane isomerization described in this embodiment is:

[0046] Calcinate the Hβ molecular sieve at 500°C for 4 hours, then mix 9 parts by weight of alumina powder with 1 part by weight of the calcined Hβ molecular sieve, add 0.5 parts by weight of nickel phosphide, mix well and then extrude into strips at 50°C After drying, it was ground into particles with a particle size of 0.45 mm, and then the particles were calcined at 100° C. under a nitrogen atmosphere for 2 hours to prepare catalyst A3.

[0047] The catalyst A3 prepared in this example was prepared at a reaction temperature of 230°C; a reaction pressure of 2.0MP...

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Abstract

The invention relates to a catalyst used for light paraffin isomerization and a preparation method and a using method thereof. The catalyst is composed of a carrier and amorphous state nickel phosphide accounting for 1-30 wt% of the weight of the carrier, wherein the carrier is composed of aluminum oxide and an Hbeta molecular sieve, and the weight ratio of the aluminum oxide to the Hbeta molecular sieve is 1:10-10:1. According to the catalyst, a halogen component is not needed, precious metal is also not used, in this way, environmental pollution is avoided, the cost of the catalyst is lowered, and meanwhile the catalyst can be directly used for the isomerization technology without pre-hydrogenation reduction. Through testing, the catalytic activity of the catalyst is higher than that of crystalline state nickel phosphide when applied to catalyzing the light paraffin isomerization reaction, and isoparaffin selectivity and the stability of the catalyst are also good.

Description

technical field [0001] The invention belongs to the field of isomerization of light alkanes, and in particular relates to a catalyst for catalyzing the isomerization of light alkanes and a preparation and use method thereof. Background technique [0002] In the past ten years, my country's gasoline standards have been continuously upgraded, and it is planned to fully implement the National V gasoline standards in 2018. The standards require further reduction of sulfur and olefin content in gasoline, and the addition of manganese-containing additives is not allowed. Therefore, it is an inevitable trend to increase the content of light isoparaffins in gasoline that do not contain impurities such as sulfur and nitrogen and have high octane numbers. my country is rich in straight-run naphtha and hydrocracked naphtha. These oils have a high content of n-alkanes, but their octane number is very low. Therefore, these oils are produced by isomerization technology with high octane nu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J27/185C10G45/64C07C5/27C07C9/16
CPCB01J27/185B01J29/76B01J2229/186C07C5/2708C07C2527/185C07C2529/76C10G45/64C07C9/16
Inventor 夏道宏陈金射井晓慧宋兆阳朱丽君项玉芝周玉路
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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