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Synthetized modification HZSM-5 zeolite catalyst and method for preparing the same and use thereof

A technology of zeolite catalyst and catalyst carrier, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor catalytic stability and poor comprehensive performance, and achieve good desulfurization, reasonable composition and distribution, The effect of broad application prospects

Active Publication Date: 2007-12-05
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the objectives of the present invention is to provide a catalyst to solve the problems of poor catalytic stability and poor comprehensive performance of existing catalytic cracking gasoline upgrading catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The present embodiment prepares weight percent content to be 3% NiO, 7% MoO 3 , 70% HZSM-5, 20% Al 2 o 3 Hydrothermal and citric acid modified catalyst D.

[0044] The preparation method is the same as that of Comparative Example 2, except that after the catalyst carrier is made, a step of citric acid treatment is added, and then the treated carrier is impregnated with metal components. The specific steps of citric acid treatment are: put the catalyst carrier into the acetic acid solution with a concentration of 0.7mol / L according to the ratio of liquid to solid ratio of 8ml / g, carry out pickling treatment at 90°C for 8 hours, and then The final product is washed, filtered, and then dried and roasted.

Embodiment 2

[0046] The present embodiment prepares weight percent content to be 3% NiO, 7% MoO 3 , 70% HZSM-5, 20% Al 2 o 3 The hydrothermal and acetic acid modification catalyst E.

[0047] The preparation method is the same as that of Comparative Example 2, except that after the catalyst carrier is made, the step of acetic acid treatment is added, and then the treated carrier is impregnated with metal components. The specific steps of acetic acid treatment are: put the catalyst carrier into the acetic acid solution with a concentration of 2mol / L according to the ratio of liquid to solid ratio of 10ml / g, carry out pickling treatment at 90°C for 6 hours, and then wash the The product is washed, filtered, and then dried and roasted.

Embodiment 3

[0049] The present embodiment prepares weight percent content to be 3% NiO, 7% MoO 3 , 70% HZSM-5, 20% Al 2 o 3 Hydrothermal and oxalic acid modification catalyst F.

[0050] The preparation method is the same as that of Comparative Example 2, except that after the catalyst carrier is prepared, the step of oxalic acid treatment is added, and then the treated carrier is impregnated with metal components. The specific steps of oxalic acid treatment are: put the catalyst carrier into the oxalic acid solution with a concentration of 1.2mol / L according to the ratio of liquid to solid ratio of 9ml / g, carry out pickling treatment at 90°C for 8 hours, and then wash the The product is washed, filtered, and then dried and roasted.

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Abstract

The present invention relates to one kind of comprehensively modified HZSM-5 zeolite catalyst and its preparation process and use. The process of preparing the catalyst includes the following steps: mixing HZSM-5 zeolite and adhesive in the weight ratio of 1-4, adding sesbania powder and water solution of HNO3 into the mixture to reach sesbania powder concentration of 1-3 wt% and HNO3 concentration of 2-5 wt%, kneading, extruding, drying and roasting to form catalyst carrier intermediate, hydrothermally modifying and organic acid treating the intermediate to obtain catalyst carrier, supporting active metal components onto the carrier, drying, and roasting to form catalyst product. The comprehensively modified HZSM-5 zeolite catalyst is applied in the hydrogenating modification of catalytically cracked gasoline, and can lower its olefin and sulfur content and improve its anti-knock index.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application, in particular to a catalyst with comprehensively modified HZSM-5 zeolite as a carrier, its preparation method and application. Background technique [0002] At present, the high olefin content and sulfur content in FCC gasoline have become the key problems that plague the world's clean gasoline production. In the case of less high-octane reformed gasoline and alkylated gasoline, in order to meet the increasingly stringent clean gasoline standards, FCC gasoline hydro-upgrading has become one of the key technologies for the production of clean fuel for vehicles . [0003] US Patent No. 5,770,047 introduces a catalyst for desulfurization and olefin reduction mainly developed by Intevep Company, mainly for hydroisomerization. The carrier is MFI type zeolite (such as HZSM-5 or HZSM-12) and Al 2 o 3 , Si(mol) / Al(mol) of zeolite=10~200, specific surface area is 250~1200m 2 / g...

Claims

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Application Information

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IPC IPC(8): B01J29/48B01J29/46C10G45/08C10G49/04
Inventor 鲍晓军范煜林秀英石冈
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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