Preparation method of light alkane isomerization catalyst and isomerization method of light alkane

A technology of isomerization and catalyst, which is applied in the preparation of light alkane isomerization catalyst and the field of isomerization of light alkane, can solve the problem of low isomerization yield, achieve catalyst stability, improve stability, Effect of improving isomerization performance

Active Publication Date: 2016-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For catalysts based on zeolite, due to the low acidity of the zeolite material, the isomerization reaction needs to be carried out at a higher temperature, so the isomerization yield is also lower when the chemical equilibrium is reached.

Method used

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  • Preparation method of light alkane isomerization catalyst and isomerization method of light alkane
  • Preparation method of light alkane isomerization catalyst and isomerization method of light alkane
  • Preparation method of light alkane isomerization catalyst and isomerization method of light alkane

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preparation example Construction

[0038] About the preparation method of light alkane isomerization catalyst

[0039] The mass dosage ratio of Zr-containing salt to Fe-containing salt:

[0040] In the present invention, the mass dosage ratio of the Zr-containing salt to the Fe-containing salt is not particularly limited, usually in step a, the Fe-containing salt is further added, and the mass dosage ratio of the Zr-containing salt to the Fe-containing salt is 1.1:1~10:1.

[0041] If the mass ratio of the Zr-containing salt to the Fe-containing salt is less than 1.1:1, the H 2 SO 4 The load is too low, the acidity is too weak, the isomerization reaction activity is reduced, and the mass dosage ratio of Zr-containing salt to Fe-containing salt is greater than 10:1, because the amount of Zr-containing salt is too much, resulting in waste, and the load h 2 SO 4 Reduced acid strength, reduced isomerization reactivity, and no other beneficial effects.

[0042] Fe-containing salts:

[0043] In the present i...

Embodiment 1

[0063] Embodiment 1 prepares catalyst

[0064] Prepare two solutions separately, the first solution is 96.6g ZrOCl 2 ·8H 2 O was dissolved in 150mL of deionized water to prepare a solution with a Zr content of 2mol / L; the second solution was to mix 27.1g (NH 4 ) 6 h 2 W 12 o 40 Dissolve in 100mL of deionized water to prepare a solution with a W content of 1.1mol / L, and then add 52g of ammonia water with a concentration of 1.5mol / L. After the first solution is prepared, slowly add the second solution dropwise to the first solution under rapid mechanical stirring, and it takes 30-45 minutes to complete the dropwise addition. Then the solution was adjusted to pH=9 with ammonia water, and then the stirring was continued for 1.5-2 hours. The resulting precipitate was filtered and washed 4 times with deionized water. Then the washed product was dried in an oven at 110° C. for 12 hours. The solid obtained after drying was separated by SO 4 2- A standard with a loading of 2...

Embodiment 2

[0065] Embodiment 2 prepares catalyst

[0066] Prepare two solutions separately, the first solution is 24.1g ZrOCl 2 ·8H 2 O was dissolved in 150mL of deionized water to prepare a solution with a Zr content of 0.5mol / L; the second solution was to mix 49.3g (NH 4 ) 6 h 2 W 12 o 40 Dissolve in 100mL of deionized water to prepare a solution with a W content of 2mol / L, and then add 30g of ammonia water with a concentration of 1.5mol / L. After the first solution is prepared, slowly add the second solution dropwise to the first solution under rapid mechanical stirring, and it takes 30-45 minutes to complete the dropwise addition. Then the solution was adjusted to pH=9 with ammonia water, and then the stirring was continued for 1.5-2 hours. The resulting precipitate was filtered and washed 4 times with deionized water. Then the washed product was dried in an oven at 130° C. for 8 hours. The solid obtained after drying was separated by SO 4 2- A standard with a loading of 0....

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Abstract

The invention discloses a preparation method of a light n-alkane isomerization catalyst and an isomerization method of the light n-alkane. In the invention, a solid super-acidic catalyst is synthesized through a co-precipitation method and a hydrothermal method, wherein the catalyst is used for isomerization of C4-C8 n-alkanes, especially, n-pentane. Hydrogen exists in a reaction atmosphere, thus significantly improving reaction performance and stability of the catalyst. The n-alkane isomerization catalyst and the reaction process therewith are free of environment pollution and device corrosion, has high activity and selectivity, and has stable reaction performance.

Description

technical field [0001] The invention relates to a preparation method of a light alkane isomerization catalyst and a light alkane isomerization method. Background technique [0002] With the rapid development of the world economy, the requirements of environmental protection for industrial production are becoming increasingly stringent. In recent years, the number of cars in my country has been increasing, and the demand for gasoline is increasing. In 2010, my country implemented gasoline standards in line with international standards, and the restrictions on olefins, aromatics, benzene and sulfur in gasoline were more stringent. Isomerized oil is free of olefins, aromatics and sulfur, and is an ideal blending component of clean gasoline with high octane number and low vapor pressure. [0003] At the end of the 1980s, about 34.3Mt of light alkanes were produced in the world through the isomerization process to produce high-octane gasoline components, and the isomerization u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C07C5/27C07C9/18
Inventor 罗琛马晨菲迟克彬沈宜泓曹青阎立军庞新梅李发永
Owner PETROCHINA CO LTD
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