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Normal-paraffin isomerization catalyst, preparation method and application thereof

A technology of n-alkane and catalyst, which is applied in the field of n-alkane isomerization catalyst and its preparation, can solve the problems of low activity, low conversion rate and poor stability of isomerization catalyst, and achieve low cost, high conversion rate, good stability effect

Active Publication Date: 2014-10-29
JIANGSU YANGZI CATALYST CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The present invention proposes a n-paraffin isomerization catalyst and its preparation method and application, which solves the problems of low activity, poor stability and low conversion rate of the isomerization catalyst in the prior art

Method used

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  • Normal-paraffin isomerization catalyst, preparation method and application thereof
  • Normal-paraffin isomerization catalyst, preparation method and application thereof
  • Normal-paraffin isomerization catalyst, preparation method and application thereof

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preparation example Construction

[0029] See attached Figure 5 , a preparation method of n-paraffin isomerization catalyst, comprising the following steps:

[0030] 1) impregnation, in the γ-Al of 80-120 parts by weight 2 o 3 20-30 parts by weight of chloroplatinic acid is impregnated on the carrier, the impregnated product is dried at 100-120°C for 2-5 hours, and then oxidized at 500-700°C for 2-5 hours;

[0031] 2) Reduction, the product obtained in step 1) is subjected to reduction treatment, the reduction temperature is 200-500°C, the reduction time is 2-5h, and the reduction pressure is 1-3MPa;

[0032] 3) Inorganic chlorination, the product obtained in step 2) is subjected to inorganic chlorination, the temperature of the inorganic chlorination is 400-500°C, the chlorination time is 2-8h, and the inorganic chlorination agent is AlCl 3 , AlCl 3 The mass of γ-Al 2 o 3 15-50% of the mass of the carrier;

[0033] 4) Organic chlorination, the product obtained in step 3) is organically chlorinated, the...

Embodiment 1

[0041] Get 20 parts by weight of chloroplatinic acid, impregnate it into γ-Al of 100 parts by weight 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface of the carrier is 200m 2 / g, the pore volume was 0.60mL / g; then, the impregnated product was dried in an oven at 100°C for 2 hours, and then baked in a muffle furnace at 500°C for 5 hours.

[0042] Put the obtained product in a reactor, and use hydrogen for reduction treatment. The reduction temperature is 250°C, the hydrogen pressure is 2MPa, and the reduction time is 2h; The catalyst can be chlorinated.

[0043] AlCl 3 Sublimation gasification, using H 2 As a carrier gas to vaporize AlCl 3 Loaded into the catalyst bed, the chlorination temperature is 500°C, chlorination at normal pressure for 6h, the AlCl used 3 The mass of γ-Al 2 o 3 50% of the mass of the carrier; after chlorination, use H 2 Continue purging for 2h to lower the temperature to 200°C.

[0044] CCl 4 Gasification, using N 2 As a carrier gas to...

Embodiment 2

[0049] Get 30 parts by weight of chloroplatinic acid and impregnate it into 80 parts by weight of γ-Al 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface of the carrier is 220m 2 / g, the pore volume was 0.45mL / g; then, the impregnated product was dried in an oven at 120°C for 5 hours, and then baked in a muffle furnace at 600°C for 2 hours.

[0050] Put the obtained product in a reactor for reduction treatment, the reduction treatment process is gas phase reduction, the reduction gas is hydrogen, the reduction temperature is 500 ° C, the hydrogen pressure is 1 MPa, and the reduction time is 3 hours. The reduced catalyst can be chlorinated deal with.

[0051] AlCl 3 Sublimation gasification, using H 2 As a carrier gas to vaporize AlCl 3 Loaded into the catalyst bed, the chlorination temperature is 400°C, chlorination at normal pressure for 8h, the AlCl used 3 The mass of γ-Al 2 o 3 30% of the mass of the carrier; after chlorination, use H 2 Continue purging for 1 ...

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Abstract

The invention provides a normal-paraffin isomerization catalyst, a preparation method and application of the normal-paraffin isomerization catalyst, and relates to the technical field of the paraffin-isomerization catalyst, and is used for solving the problems of low activity, poor stability and low conversion rate in the existing isomerization catalyst. The normal-paraffin isomerization catalyst comprises the following components in percentage by mass: 0.1-1.0% of metal component Pt and 2.0-5.0% of halogen Cl and the balance of carrier gamma-Al2O3. The normal-paraffin isomerization catalyst provided by the invention is prepared by dipping, reduction, inorganic chlorination and organic chlorination; the metal elementary substance Pt is loaded on the multi-porous carrier gamma-Al2O3, and after chlorination treatment, the Pt-Al2O3-Cl normal-paraffin low-temperature isomerization catalyst is formed; and the normal-paraffin isomerization catalyst has the advantages of high liquid absorption, high isomerization rate, high reaction activity and good stability.

Description

technical field [0001] The invention relates to the technical field of alkane isomerization catalysts, in particular to a normal alkane isomerization catalyst and its preparation method and application. Background technique [0002] With the gradual development of gasoline standards in the direction of unleaded, low aromatics, low vapor pressure, high octane number and high oxygen content, countries are demanding gasoline blending components that can provide high octane number without increasing gasoline aromatics content. The demand for isomerization is increasing. The octane number of isoparaffins is much higher than that of normal paraffins. If normal paraffins can be converted into isoparaffins with high octane number to the greatest extent, it will play a very important role in increasing the octane number of gasoline. Since the vast majority of gasoline in my country comes from catalytic cracking gasoline, and the treatment of hydrodesulfurization and olefin reduction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13B01J35/10C07C5/22C07C9/16C07C9/18
Inventor 李传李向伟邓文安闫智慧李庶峰文萍杜峰
Owner JIANGSU YANGZI CATALYST CO LTD
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