Solid superacid catalyst and preparation method thereof, and isomerization method of light n-alkanes

A technology for solid super acid and n-alkane, which is used in isomerization to produce hydrocarbons, chemical instruments and methods, catalysts for physical/chemical processes, etc. It can solve the problems of low reaction temperature, pollution, catalyst corrosion, etc. The effect of not polluting the environment and not corroding equipment

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

This type of catalyst has strong acidity, and the reaction temperature of isomerization using this type of catalyst is low, and the yield of isoparaffin is high, but this type of catalyst needs to continuously add a small amount of organic chlorine during use to maintain the catalyst. activity, which causes some corrosion and pollution in the process of loading and handling the catalyst, and this kind of catalyst is very sensitive to water and sulfur, and the raw materials are required to be basically free of water and sulfur

Method used

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  • Solid superacid catalyst and preparation method thereof, and isomerization method of light n-alkanes
  • Solid superacid catalyst and preparation method thereof, and isomerization method of light n-alkanes
  • Solid superacid catalyst and preparation method thereof, and isomerization method of light n-alkanes

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preparation example Construction

[0037] About the preparation method of solid superacid catalyst

[0038] In step a, the salt containing Zr, Ce, Sn:

[0039] In the present invention, in step a, the salt containing Zr, Ce, Sn is not particularly limited, usually in step a, the salt containing Zr, Ce, Sn is zirconium nitrate or zirconium oxychloride, nitric acid Cerium ammonium or cerium nitrate, tin tetrachloride or tin dichloride.

[0040] In step b, the salt containing W:

[0041] In the present invention, there is no particular limitation on the W-containing salt in step b, and usually in step b, the W-containing salt is ammonium metatungstate or sodium tungstate.

[0042] In step e, the SO 4 2- Impregnation amount:

[0043] In the present invention, for step e, the SO 4 2- The amount of impregnation is not particularly limited, usually in step e, the SO 4 2- The amount of impregnation reaches 1-10wt% SO 4 2 , based on the total weight of the solid superacid catalyst.

[0044] If ...

Embodiment 1

[0057] Embodiment 1 prepares catalyst

[0058] Prepare two solutions respectively, the first solution is 80g ZrOCl 2 ·8H 2 O, 20g (NH 4 ) 2 Ce(NO 3 ) 6 , 20gSnCl 4 ·5H 2 O was dissolved in 150 mL deionized water; the second solution was 15 g (NH 4 ) 6 h 2 W 12 o 40 Dissolve in 100mL deionized water, then add 69g concentrated ammonia water. 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 adjust the pH of this solution to 10 with ammonia water to obtain a precipitated suspension. After continuing to stir for 30 minutes, transfer the above suspension to a high-pressure reactor. After the reactor is sealed, use N 2 Replace the air in the reactor, and put the N in the reactor 2 The gas pressure was set at 2 MPa, the reaction temperature of the reactor was 130° C., the stirring rate was 100 rpm, and the reaction was car...

Embodiment 2

[0059] Embodiment 2 prepares catalyst

[0060] Preparation method is the same as embodiment 1, just with (NH 4 ) 2 Ce(NO 3 ) 6 The amount is adjusted to 2.99g, SnCl 4 ·5H 2 The amount of O was adjusted to 2.25g, and 1.7g (NH 4 ) 6 h 2 W 12 o 40 Dissolve in 34.6mL deionized water, then add 23g concentrated ammonia water. N in the reactor 2 The gas pressure was set at 5 MPa, the reaction temperature of the reactor was 200° C., and the reaction was carried out for 2 hours. Marked as catalyst B, the catalyst components are: 5wt% W; 3wt% Ce; 3wt% Sn; 0.01wt% Pt; 1wt% SO 4 2- , the other is the balance amount of Zr.

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Abstract

The invention discloses a solid superacid catalyst and a preparation method thereof, and an isomerization method of light n-alkanes; the solid superacid catalyst comprises the following components: 5-20 wt% of W, 3-20 wt% of Ce, 3-20 wt% of Sn, 0.01-0.8 wt% of Pt, 1-10 wt% of SO4<2->, and the balance Zr with the balanced amount; the catalyst can be used for isomerization of C4-C8 n-alkanes, especially isomerization of C5 and C6 alkanes, and the reaction performance and stability of the catalyst can be significantly improved under hydroisomerization reaction conditions.

Description

technical field [0001] The invention relates to a solid superacid catalyst, a preparation method thereof and an isomerization method of light normal alkanes. Background technique [0002] In recent years, with the development of the economy and the increasingly stringent requirements for environmental protection, the quality of gasoline is developing towards low sulfur, low aromatics, low vapor pressure, reduced olefins and high octane number. At present, the composition of my country's gasoline pool is: FCC gasoline components occupy an absolute dominant position of 74.1%, reformed gasoline accounts for 14.6%, MTBE accounts for 1.0%, alkylate oil accounts for 0.5%, and other components account for 9.8%. my country's gasoline has the problems of high olefin and sulfur content and uneven distribution of octane number. Therefore, our country needs to adjust the composition of the gasoline pool. Isomerized oil is free of olefins, aromatics and sulfur, and is an ideal blending...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C07C9/15C07C5/27
Inventor 罗琛曹青迟克彬沈宜泓马晨菲阎立军庞新梅李发永
Owner PETROCHINA CO LTD
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