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Metal modified AFO structure silicon aluminum phosphate molecular sieve and application thereof

A technology of metal modification and silicoaluminophosphate, which is applied in the field of molecular sieves to achieve the effects of increased propylene concentration, propylene yield and selectivity, and increased selectivity

Active Publication Date: 2009-06-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there has been no report on the properties of this molecular sieve in hydrocarbon cracking conversion after modification with metals

Method used

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  • Metal modified AFO structure silicon aluminum phosphate molecular sieve and application thereof

Examples

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Effect test

example 1

[0023] Add 6.6gFe(NO 3 ) 3 9H 2O is dissolved in a mixed solution of 90 g of water and 10 g of ethanol, mixed with 100 g (dry basis) of an AFO molecular sieve sample prepared according to the method of CN1448336A, impregnated and dried; the obtained sample is roasted at 550 ° C for 2 hours, that is, the molecular sieve provided by the invention . The chemical composition of elemental analysis is: 1.3Fe 2 o 3 48.1 Al 2 o 3 43.3P 2 o 5 7.3 SiO2 2 .

example 2

[0025] Add 10.1g FeCl 3 Dissolve in a mixed solution of 90g water and 10g ethanol, mix with 100g (dry basis) AFO molecular sieve sample prepared according to the method of CN1448336A, impregnate and dry; the obtained sample is roasted at 550°C for 2 hours, that is, the molecular sieve provided by the present invention. The chemical composition of elemental analysis is: 4.9Fe 2 o 3 49.9Al 2 o 3 43.0P 2 o 5 2.2SiO2 2 .

example 3

[0027] Add 3.5gFe 2 (SO 4 ) 3 ·6H 2 O is dissolved in a mixed solution of 90 g of water and 10 g of ethanol, mixed with 100 g (dry basis) of an AFO molecular sieve sample prepared according to the method of CN1448336A, impregnated and dried; the obtained sample is roasted at 550 ° C for 2 hours, that is, the molecular sieve provided by the invention . The chemical composition of elemental analysis is: 1.0Fe 2 o 3 31.5Al 2 o 3 ·54.8P 2 o 5 12.7SiO2 2 .

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Abstract

The invention discloses a silicoaluminophosphate molecular sieve with AFO structure, which is characterized by the following: the anhydrous chemical formula of molecular sieve is (0.1-15)MxOy .(0.9-72)Al2O3 .(1-78)P2O5 .(0.4-97)SiO2, which adopts oxide quality as standard, wherein M is one of Fe, Co, Ni, Ba, Cu, Zn, Sn, Mn; x represents the atom number of M; y is the number of M oxidizing state.

Description

technical field [0001] The present invention relates to a molecular sieve with an AFO structure and the application of the molecular sieve, and more specifically relates to a modified AFO structure silicon aluminum phosphate molecular sieve and the application of the molecular sieve in catalytic cracking of hydrocarbons to improve the cracking of hydrocarbon raw materials to Propylene selectivity and yield. Background technique [0002] Steam thermal cracking and catalytic cracking of hydrocarbons are important industrial processes for the production of propylene, of which propylene in FCC units provides about 30% of the demand. Because of the enormous throughput, small improvements in operating efficiency can translate into significant gains, and catalysts play an important role in the more selective conversion of hydrocarbons to olefins. [0003] Catalysts containing mesoporous zeolites can crack naphtha into small olefin molecules such as ethylene, propylene, and butene,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B37/08C01B39/54
Inventor 罗一斌达志坚欧阳颖李黎声龙军庄立王殿中舒兴田宗保宁李明罡
Owner CHINA PETROLEUM & CHEM CORP