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Catalyst for preparing ethene and propene by catalysis cracking

An ethylene propylene and catalytic cracking technology, applied in physical/chemical process catalysts, molecular sieve catalysts, hydrocarbon cracking to produce hydrocarbons, etc., can solve the problems of high operating temperature, low catalyst activity, and low ethylene propylene yield.

Active Publication Date: 2008-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the catalyst used in the existing catalytic cracking reaction has low activity, low yield of ethylene propylene, and high use temperature. A new catalyst for producing ethylene propylene by catalytic cracking is provided.

Method used

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  • Catalyst for preparing ethene and propene by catalysis cracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 5.56 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 12.2 grams of B Diamine and 29.4 grams of tetraethylammonium hydroxide (the mixed template is denoted as M), after stirring for a period of time, adjust the pH value at 11 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: M: H 2 O=1:0.0167:0.4:40, add 2.8 grams of zeolite beta seed crystals, put the mixed solution in an autoclave, keep it at 160°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, and bake at 550°C 3 hours, made ZSM-5 / beta zeolite intergrowth molecular sieve, XRD diffraction pattern as figure 1 As shown in the middle curve 1, it can be known by XRD diffraction that the weight percentage of ZSM-5 in the intergrown molecular sieve is 94.6%, and th...

Embodiment 2～4

[0021] According to the method of Example 1, the pH of the solution was controlled to be 10.5, 11.5 and 12 respectively, and ZSM-5 / beta zeolite intergrowth molecular sieves were synthesized respectively, which were respectively marked as FH-2, FH-3 and FH-4. The ratio of ZSM-5 and zeolite beta is shown in Table 3. Evaluation according to the method of Example 1, the results are shown in Table 4.

Embodiment 5～11

[0023] According to the method of Example 1, the different molar ratios of the solutions are controlled, and the ratio of the two in the mixed template agent remains unchanged. The ZSM-5 / beta zeolite symbiotic molecular sieves synthesized respectively are shown in Table 2, and the ratios of ZSM-5 and beta zeolite are shown in Table 2. 3. Evaluation according to the method of Example 1, the results are shown in Table 4.

[0024] Table 2

[0025] Example

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Abstract

The invention relates to a catalyst used for producing ethylene and propylene by catalytic cracking, and mainly solves the problem that temperature required by the catalyst is high while selectivity to the ethylene and the propylene is low in the existing catalytic cracking reaction. The invention adopts the technical proposal of sieving ZSM-5 / beta zeolite accrete molecular as catalyst, and SiO2 / Al2O3 mole ratio of which is more than 100 to 500, thereby properly solving the problem. The invention is used for industrial production of the ethylene and the propylene by the catalytic cracking.

Description

technical field [0001] The present invention relates to a catalyst for producing ethylene propylene by catalytic cracking. Background technique [0002] With the development of society, the market demand for ethylene propylene in my country has increased sharply, the import volume of ethylene propylene and its downstream products has increased year by year, and the market share of domestic products is less than half. At present, ethylene in the world mainly uses naphtha (or ethane) as raw material and adopts steam pyrolysis technology (at a temperature of about 800°C) to produce ethylene, and its output exceeds 90% of the total output. Compared with steam thermal cracking, the reaction temperature of catalytic cracking is about 50-200℃ lower than that of standard cracking reaction, so the energy consumption is less than that of ordinary steam cracking, and the coking rate of the inner wall of cracking furnace tube will be reduced, which can prolong the operation period and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/04C07C11/06B01J29/80
CPCY02P20/52
Inventor 陈亮谢在库马广伟胡永君姚晖
Owner CHINA PETROLEUM & CHEM CORP
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