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Cracking catalyst containing metallic oxide modified AFO structured silicoaluminophosphate molecular sieve

A silicon-alumina phosphate and catalyst technology, applied in the direction of molecular sieve catalyst, physical/chemical process catalyst, catalytic cracking, etc., to achieve the effect of improving hydrocarbon cracking capacity, high propylene yield and propylene selectivity, and high cracking capacity

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent does not involve IVB metal modification

Method used

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  • Cracking catalyst containing metallic oxide modified AFO structured silicoaluminophosphate molecular sieve
  • Cracking catalyst containing metallic oxide modified AFO structured silicoaluminophosphate molecular sieve
  • Cracking catalyst containing metallic oxide modified AFO structured silicoaluminophosphate molecular sieve

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Experimental program
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Effect test

preparation Embodiment 1

[0039] Take 150g (dry basis) of an AFO molecular sieve sample prepared according to the method of CN1448336A (refer to the method of Comparative Example 1) and roast at 300°C for 3 hours, and the water content of the molecular sieve after roasting is 1% by weight.

[0040] 9.9g zirconium nitrate Zr(NO 3 ) 4 ·5H 2 O was dissolved in 200g of ethanol (analytically pure, ethanol content 99.9% by weight) to make an impregnating solution, and the obtained impregnating solution was mixed with the above-mentioned treated molecular sieves evenly, left to stand for 24 hours, dried at 100°C for 24 hours, and dried in a nitrogen atmosphere at 500 °C for 4 hours.

[0041] Add the above-mentioned roasted molecular sieves to 2000g of inorganic acid aqueous solution (dilute hydrochloric acid solution) with an acid concentration of 1.0mol / L, mix well, raise the temperature to 80°C and continue stirring for 3 hours, then filter and wash with deionized water (washing water volume 15 times the...

preparation Embodiment 2

[0044] Take 150g (dry basis) of the AFO structure molecular sieve sample DF-1 prepared according to CN1448336A method at 200°C, 10 -3 Vacuumize under Pa for 4 hours, and the water content of the molecular sieve after treatment is 0.5% by weight, which is denoted as A-2;

[0045] 23.5g zirconium oxychloride ZrOCl 2 ·8H 2 O was dissolved in 400g of ethanol (analytically pure, ethanol content 99.9% by weight) to make an impregnating solution, and the obtained impregnating solution was mixed with the above-mentioned treated molecular sieve A-2 evenly, stirred for 6 hours, dried at 100°C for 24 hours, and dried in a nitrogen atmosphere , Calcined at 600° C. for 3 hours to obtain calcined molecular sieve AC-2.

[0046] Add the above-mentioned roasted molecular sieve AC-2 to 1500g of oxalic acid aqueous solution with an acid concentration of 2.0mol / L, stir at 90°C for 1 hour, then filter and wash with deionized water (the amount of washing water is 15 times the dry weight of the mo...

preparation Embodiment 3

[0052] Take 150g (dry basis) of the molecular sieve sample with AFO structure prepared according to the CN1448336A method and roast at 300°C for 3 hours, and the water content of the molecular sieve after roasting is 1% by weight.

[0053] 51.2g zirconium nitrate Zr (NO 3 ) 4 ·5H 2 O was dissolved in 300g of ethanol (analytically pure, ethanol content 99.9% by weight) to make an impregnating solution, and the obtained impregnating solution was mixed with the above-mentioned treated molecular sieve evenly, left to stand for 20 hours, dried at 100°C for 24 hours, and then dried in a nitrogen atmosphere at 450 °C for 5 hours.

[0054] Add the above roasted molecular sieve into 1000g of inorganic acid (hydrochloric acid) aqueous solution with an acid concentration of 0.5mol / L, mix well, raise the temperature to 80°C and continue stirring for 3 hours, then filter and wash with deionized water (the amount of washing water is molecular sieve 20 times the weight on a dry basis), ta...

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Abstract

The invention discloses a cracking catalyst containing a metallic oxide modified AFO structured silicoaluminophosphate molecular sieve. The cracking catalyst comprises the following ingredients in percentage by weight: 10-80% of Y type zeolite, 1-50% of the metallic oxide modified AFO structured silicoaluminophosphate molecular sieve, 5-70% of clay and 5-60% of a binder; based on mass of oxide, the anhydrous chemical expression of the metallic oxide modified AFO structured silicoaluminophosphate molecular sieve is as follows: (0.1-15) MO2.(0.5-75) Al2O3.(1-78) P2O5.(0.4-97) SiO2, wherein M is one or more selected from Ti, Zr, Hf and Rf of IV group metals. The catalyst provided by the invention is higher in propylene yield and propylene selectivity; in the liquefied gas, the propylene concentration is obviously improved.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst, and more particularly to a cracking catalyst containing a metal oxide modified AFO structure silicon aluminum phosphate molecular sieve. Background technique [0002] With the rapid growth of the demand for derivatives such as polypropylene, the world's demand for propylene is increasing year by year. Fluid catalytic cracking is one of the important processes for the production of light olefins and propylene. In order to increase the production of low-carbon olefins and propylene, people usually add type-selective molecular sieves to the catalyst. For example, US3758403 discloses a catalyst with ZSM-5 and large-pore zeolite (mainly Y-type zeolite) as active components, which can improve the octane number of gasoline. At the same time, it also increases the yield of C3 and C4 olefins. The large-pore zeolite cracks the raw materials to generate gasoline and diesel, and the ZSM-5 type-selective mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C10G11/05
Inventor 田辉平于善青王振波朱玉霞
Owner CHINA PETROLEUM & CHEM CORP
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