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Aromatizatian catalytic material and preparation method thereof

A technology of catalytic materials and oxides, applied in chemical instruments and methods, physical/chemical process catalysts, catalytic cracking, etc., can solve the cracking aromatization activity of molecular sieves, affect the acid distribution of molecular sieves, affect the pore structure of molecular sieves, etc., to achieve Good thermal and hydrothermal stability, high crystallinity, and high aromatization selectivity

Active Publication Date: 2009-10-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional impregnation, ion exchange, and mechanical mixing modification methods cannot control the position of the metal ions on the molecular sieve when the metal ions are introduced. The metal ions are deposited on the outer surface of the molecular sieve and the inner surface of the channel at the same time. During the process, the metal ions in the pores interact with the aluminum ions in the molecular sieve framework, resulting in serious dealumination of the molecular sieve, which affects the pore structure of the molecular sieve on the one hand, and affects the acid distribution of the molecular sieve on the other hand, resulting in cracking and aromatization of the molecular sieve. Reduced activity

Method used

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  • Aromatizatian catalytic material and preparation method thereof
  • Aromatizatian catalytic material and preparation method thereof
  • Aromatizatian catalytic material and preparation method thereof

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preparation example Construction

[0035] The preparation method of the catalytic material provided by the present invention comprises several steps of removing the template agent from the molecular sieve and converting it into an ammonium type molecular sieve, impregnating the organic solvent and modifying the metal:

[0036] a, the former powder of molecular sieve is roasted to remove template agent, according to molecular sieve: ammonia salt: H 2 O=1:(0.1~1):(5~10) weight ratio Mix and stir the molecular sieve, ammonium salt and water for removing the templating agent evenly, exchange at room temperature to 100°C for at least 0.3 hours, filter and dry to obtain Ammonium molecular sieve;

[0037] B, according to the liquid / solid mass ratio of organic solvent and molecular sieve is (0.2~20): the amount of 1, organic solvent and ammonium type molecular sieve obtained in step a are mixed uniformly, at 15 ℃~maintaining the temperature that solution is liquid phase , impregnated for at least 0.5 hours, filtered a...

Embodiment 1

[0057] Example 1 illustrates the properties of the Cu-β molecular sieve prepared by the method provided by the present invention.

[0058] Take 10 g of the pretreated molecular sieve sample B-25 in Comparative Example 1, add it into a beaker containing 10 g of n-octane, mix well, and treat for 1 hour.

[0059] Place the treated molecular sieve in 2g of copper nitrate aqueous solution with a concentration of 19wt%, mix evenly, dry at 60°C for 10 hours after impregnating for 2 hours, then bake at 550°C for 2 hours in an air atmosphere, and then water at 800°C The Cu-β molecular sieve sample obtained by steam heat treatment for 4 hours is designated as A-1. Its anhydrous chemical expression is: 0.08Na 2 O 8.02Al 2 o 3 1.5CuO 90.4SiO 2 . Its H 2 -TPR analysis see Figure 4 , it can be seen from the figure that the existence state of CuO is CuO-Al 2 o 3 : CuO=1.15:1, its physical and chemical properties and acid properties are shown in Table 1.

Embodiment 2

[0061] Example 2 illustrates the preparation method of the aromatization catalytic material Cu-β molecular sieve provided by the present invention.

[0062] (1) Molecular sieve pretreatment: take SiO 2 / Al 2 o 3 The β-type molecular sieve with a molar ratio of 150 is calcined at a temperature of 350°C to 550°C to remove the template agent. According to molecular sieve: NH 4 NO 3 :H 2 The weight ratio of O=1:1:10 was exchanged at 90° C. for 0.5 hour, and the filter cake was filtered and dried to obtain molecular sieve pretreated sample B-150.

[0063] (2) Take 10 grams of B-150, add it to a beaker containing 8 grams of isooctane, and mix well.

[0064] (3) Add the sample obtained in step (2) into 4 g of copper nitrate aqueous solution with a concentration of 9.5 wt %, mix evenly, and immerse for 2 hours. Then dry at 80°C for 8 hours, bake at 550°C for 2 hours in an air atmosphere, and then heat-treat with water vapor at 800°C for 4 hours to obtain a Cu-β molecular sieve ...

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Abstract

The invention relates to an aromatizatian catalytic material and a preparation method thereof. The aromatizatian catalytic material is a metal-modified molecular sieve and has the absolute chemical expression formula of (0-0.3) Na2O.(0.5-15) Al2O3.(0.5-15) MXOY.(70-99) SiO2 by the weight of oxide, wherein the M is modified metal loaded on the molecular sieve, x represents the atomic number of the M, the y represents a number required for meeting the oxidation state of the M, one part of the metal is partially acted with Al2O3 on the surface of the molecular sieve to form an MXOY-Al2O3 surface compound, the other part of the metal exists in a form of an independent phase of a metal oxide MXOY, and the proportion between one part of the metal and the other part of the metal is: MXOY-Al2O3 : MXOY is equal to (0.5-2) : 1. The provided aromatizatian catalytic material has the advantages of high degree of crystallization, large pore volume and specific surface area, high acid content and high cracking activity and aromatizatian selectivity.

Description

technical field [0001] The present invention relates to metal-containing crystalline aluminosilicates and processes for their preparation. Background technique [0002] With the development of economy and society, environmental protection laws and regulations on the quality standards of vehicle fuel are becoming increasingly strict. my country's crude oil is heavy, and there are many paraffin-based crude oils. Catalytic cracking is the main way to lighten heavy oil. In addition, due to the relatively low production capacity of high-quality gasoline such as catalytic reforming, alkylation, etherification, and superposition in China, gasoline There is very little room for adjustment, causing the proportion of FCC gasoline in finished gasoline to be as high as 70%. Among the components of FCC gasoline, the octane number of aromatics, olefins and isoparaffins is relatively high. Compared with the current and upcoming clean gasoline standards, the quality of FCC gasoline is highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05B01J29/00
Inventor 祁芳刘中清罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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