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A kind of preparation method of gasoline alkylation catalyst

A catalyst and alkylation technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of easy carbon deposition deactivation, catalyst deactivation, small specific surface area, etc., to improve catalytic activity , Relieve poisoning inactivation, improve the effect of selectivity

Active Publication Date: 2017-09-08
NINGBO HAIYUE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid acid catalyst has good catalytic activity, on the one hand, its specific surface area is small, and it is easy to be deactivated by carbon deposition during the reaction process; Molecular products diffuse outward from the pores, causing the products to accumulate in the pores, covering the active sites and easily leading to catalyst deactivation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of gasoline alkylation catalyst in this embodiment includes the following steps:

[0021] (1) Add sodium metaaluminate and NaOH into deionized water, stir well, add template agent to the system, heat up to 40°C and continue stirring for 40 minutes; slowly add the mixture of TBT and TEOS to the above system, and then keep it at 40 Stir at ℃ for 24h;

[0022] The above-mentioned template is a mixture of hexamethyleneimine and 1-octyl-3-methylimidazolium proline salt, and the mixture of hexamethyleneimine and 1-octyl-3-methylimidazole The molar ratio of onium proline salt is 1:1;

[0023] (2) Transfer the system obtained in step (1) to a hydrothermal reactor, where the components and their molar ratios in the hydrothermal reactor are n(TBT): n(TEOS): n(Al 2 O 3 Source): n (templating agent): n (NaOH): n (H 2 O) = 0.2: 1.0: 0.02: 0.01: 2.0: 30; after sealing, it is moved into an oven at 170°C for 120 hours, the resulting reaction system is filtered, the fil...

Embodiment 2

[0028] The preparation method of gasoline alkylation catalyst in this embodiment includes the following steps:

[0029] (1) Add sodium metaaluminate and NaOH into deionized water, stir well, add template agent to the system, heat up to 80°C and continue stirring for 30 minutes; slowly add a mixture of TBT and TEOS to the above system, and then keep it at 80 Stir at ℃ for 20h;

[0030] The above-mentioned template is a mixture of hexamethyleneimine and 1-octyl-3-methylimidazolium proline salt, and the mixture of hexamethyleneimine and 1-octyl-3-methylimidazole The molar ratio of onium proline salt is 1:1;

[0031] (2) Transfer the system obtained in step (1) to a hydrothermal reactor, where the components and their molar ratios in the hydrothermal reactor are n(TBT): n(TEOS): n(Al 2 O 3 Source): n (templating agent): n (NaOH): n (H 2 O) = 0.75:1.0:0.1:0.03:2.0:150; after sealing, it is moved into an oven at 250°C for 72h, the resulting reaction system is filtered, the filter cake is ...

Embodiment 3

[0036] The preparation method of gasoline alkylation catalyst in this embodiment includes the following steps:

[0037] (1) Add sodium metaaluminate and NaOH to deionized water, stir well, add template agent to the system, heat up to 60℃ and continue stirring for 35 minutes; slowly add the mixture of TBT and TEOS to the above system, and then keep it at 50 Stir at ℃ for 22h;

[0038] The above-mentioned template is a mixture of hexamethyleneimine and 1-octyl-3-methylimidazolium proline salt, and the mixture of hexamethyleneimine and 1-octyl-3-methylimidazole The molar ratio of onium proline salt is 1:1;

[0039] (2) Transfer the system obtained in step (1) to a hydrothermal reactor, where the components and their molar ratios in the hydrothermal reactor are n(TBT): n(TEOS): n(Al 2 O 3 Source): n (templating agent): n (NaOH): n (H 2 O)=0.2:1.0:0.05:0.02:2.0:80; after sealing, it was moved into an oven at 200°C for 90h, the resulting reaction system was filtered, the filter cake was w...

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Abstract

The invention relates to a catalyst for gasoline alkylation. The catalyst is characterized in that MCM-22 molecular sieve modified using TiO2 with a mesoporous structure is adopted as a carrier, and SO4<2-> and PO4<3-> are adopted as main active components, wherein the content of TiO2 takes up 20-50 wt% of the total weight of the catalyst carrier; the total content of SO4<2-> and PO4<3-> takes up 15-35 wt% of the total weight of the catalyst; the molar ratio of SO4<2-> to PO4<3-> is 1: (1.3-3.0). The invention also relates to a preparation method of the catalyst. According to the preparation method, introduced H3PO4 and the catalyst carrier can form solid phosphoric acid, so that the alkylation reaction process is further facilitated, and the selectivity of C8 hydrocarbon is improved; the catalyst carrier has a relatively large specific surface area and a relatively large aperture structure, so that on one hand, the active components are uniformly dispersed on the catalyst carrier due to the relatively large specific surface area, and the catalytic activity of the catalyst is further improved, and on the other hand, poisoning inactivation of the catalyst can be effectively relieved during the alkylation reaction of isobutane-butene, and the service life of the catalyst is prolonged.

Description

Technical field [0001] The invention relates to a preparation method for obtaining a gasoline alkylation catalyst. Background technique [0002] The main composition of alkylated gasoline is branched alkanes (mainly trimethylpentane) with low vapor pressure and high octane number. Therefore, alkylated gasoline does not contain benzene and olefins, and has low sulfur content. After the base chemical oil is used to blend gasoline, it can dilute the benzene content, olefin content and sulfur content in gasoline on the one hand, and on the other hand can make up for the loss of octane number caused by the reduction of aromatics and olefin content. . Therefore, alkylated oil is an ideal blending component of newly formulated gasoline and clean gasoline. With the attention of modern petroleum processing to the production of clean fuel, the importance of the alkylation process is increasing. Since the alkylation reaction of isobutane and butene has been industrialized, concentrated H ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70C07C9/16C07C2/58
CPCY02P20/50
Inventor 陈尊仲赵文英
Owner NINGBO HAIYUE NEW MATERIAL
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