Catalytic cracking catalyst, preparation method therefor and application thereof

A catalytic cracking and catalyst technology, applied in the fields of chemical industry and catalytic cracking, can solve the problems of increasing the complexity of the catalyst preparation process and increasing the cost of catalyst preparation, and achieve the effects of good industrial application prospects, good bonding performance and high mechanical strength.

Active Publication Date: 2015-09-09
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the modification treatment often increases the complexity of the catalyst prep...

Method used

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  • Catalytic cracking catalyst, preparation method therefor and application thereof
  • Catalytic cracking catalyst, preparation method therefor and application thereof
  • Catalytic cracking catalyst, preparation method therefor and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The present embodiment provides a kind of preparation method of catalytic cracking catalyst, it comprises the following steps:

[0050] 1. Preparation of ZSM-5-based hierarchical porous molecular sieve:

[0051] Under stirring conditions, prepare the following two working solutions respectively:

[0052] Solution I: a uniform solution prepared from 0.14g of aluminum sulfate, 0.87g of sodium hydroxide and 10g of deionized water;

[0053] Solution II: a solution prepared from 17.27g silica sol, 0.40g tetrapropylammonium bromide and 10g deionized water;

[0054] After mixing solution I and solution II uniformly, crystallize at 80°C for 24 hours; in the above mixed solution obtained by mixing solution I and solution II uniformly, M 2 O: X 2 o 3 、YO 2 , (TPA) 2 O, H 2 The molar ratio of O is 50:1:550:3.6:7000;

[0055] Then, the temperature was raised to 180°C to continue crystallization for 24 hours; after the reaction product was suction filtered, washed, and dried...

Embodiment 2

[0063] The present embodiment provides a kind of preparation method of catalytic cracking catalyst, and its difference with embodiment 1 only is that the present embodiment adopts commercial ZSM-5 molecular sieve (SiO 2 with Al 2 o 3The molar ratio is 35, the grain size is 3-5μm) as the active component.

Embodiment 3

[0065] This embodiment provides the application of the catalytic cracking catalyst prepared in Example 1 in the preparation of propylene from carbon tetraolefin raw materials, which includes the following steps:

[0066] The catalytic cracking catalyst prepared in Example 1 was hydrothermally treated at 800° C. and 100% steam for 4 hours to obtain a hydrothermally treated catalyst;

[0067] The above-mentioned catalyst and carbon tetraolefin raw material (the mixed carbon tetraolefin raw material produced by Shenghua Refinery in Dongying, Shandong, whose composition is shown in Table 1) after hydrothermal treatment are carried out catalytic cracking reaction on a fixed bed micro-reactor, and the reaction temperature is 550°C, and the weight hourly space velocity is 5.2h -1 , The reaction time is 0.5h, 1h, 2h, 3h, 5h, 7h, 9h, 11h respectively, and the reaction results are shown in Table 2.

[0068] Table 1

[0069] components

Composition, wt%

Isobutane

...

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Abstract

The invention provides a catalytic cracking catalyst, a preparation method therefor and an application thereof. Based on 100% of the total weight of the added raw materials for preparing the catalytic cracking catalyst, the catalyst is prepared from 10-70wt% of active components, 5-80wt% of a carrier and 1-30wt% of a binder modified by modifying substances, wherein the active components are ZSM-5-based hierarchical molecular sieves which are formed by splicing or stacking nano crystals; and the binder modified by modifying substances comprises one or a combination of several of silica sol, alumina sol and aluminum phosphate sol, which are modified by the modifying surface. The catalyst disclosed by the invention has a relatively long service life and has relatively high mechanical strength because of use of the binder modified by the modifying substances; besides, the catalyst is applied to catalytic cracking reaction of preparing propylene from C4 olefin, so that a relatively high product yield can be obtained, and the industrial application prospect is good.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst, a preparation method and application thereof, and relates to the technical field of chemical engineering, in particular to the technical field of catalytic cracking. Background technique [0002] Propylene is an important basic organic raw material in the petrochemical industry. Propylene mainly comes from naphtha steam cracking and heavy oil catalytic cracking / catalytic cracking processes. Naphtha steam cracking not only has high energy consumption and low yield of high value-added products, but also its development is limited by high-quality cracked naphtha resources. Another source of propylene is a by-product of the FCC unit. However, since the main products of catalytic cracking are light oils such as gasoline and diesel, the yield of propylene is still very low. In contrast, catalytic cracking has strong feedstock adaptability (heavy oil, naphtha, C 4 And above olefins, etc.), relatively...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C11/06C07C4/10
CPCY02P20/52
Inventor 李春义张强于庆君孙书红孙金鹏张海涛黄校亮杨杰郑云锋李杨高亚男袁程远
Owner PETROCHINA CO LTD
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