Selective cracking catalyst for producing low carbon olefin
A technology for cracking catalysts and low-carbon olefins, applied in physical/chemical process catalysts, molecular sieve catalysts, cracking, etc., and can solve problems such as increased coke and/or dry gas yields
Inactive Publication Date: 2009-05-13
PETROCHINA CO LTD +1
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Problems solved by technology
The current methods to reduce the olefin content of FCC gasoline include FCC gasoline hydrogenation and the use of olefin-reducing catalysts or additives. The former will reduce the octane number due to the saturation of olefins, while the latter will increase the coke and / or dry gas yield. The phenomenon
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0012] by NH 4 The ratio (mass) of Cl and NaZSM-5 is 1:2.4, add distilled water, heat and stir for 7-8 hours, dry at 100°C, and weigh the obtained HZSM-5;
Embodiment 2
[0014] by NH 4 The ratio (mass) of Cl and NaZSM-5 is 1:1.2, add distilled water, heat and stir for 7-8 hours, dry at 100°C, and weigh the obtained HZSM-5;
Embodiment 3
[0016] The HZSM-5 prepared in Examples 1 and 2 was calcined at 700°C to form a white slightly yellowish powder.
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Abstract
A selective cracking catalyst producing low carbon alkene, belongs to the development of producing low carbon alkene by catalytic cracking gasoline and high zincic alkyl value gasoline catalyst with low content of alkene, mainly through modifying acid molecular sieve and zeolite, produces the high zincic alkyl value gasoline with low content of alkene in the time of producing low carbon alkene, which can selectively crack the alkene in FCC gasoline. In the suitable conditions, the productivity of ethylene and propylene can be higher than 30%,even to be 40%, the selective cracking is higher, and the loss of gasoline is less.
Description
technical field [0001] The present invention designs a selective cracking catalyst for the production of low-carbon olefins, which belongs to the improvement of catalytic cracking gasoline to produce low-carbon olefins and high-octane gasoline catalysts with low olefin content. Molecular sieve or zeolite, so that it can selectively crack the olefins in FCC gasoline, so as to produce low-carbon olefins and high-octane gasoline with low olefin content. Background technique [0002] The traditional process of producing low-carbon olefins—hydrocarbon thermal cracking, operates at a temperature above 800°C, and requires a large amount of water vapor to participate in the reaction, which consumes a lot of energy and requires high equipment materials; in addition, among the low-carbon olefins produced by this process, Ethylene yields are higher than propylene and are difficult to regulate. Judging from the current market demand, propylene is relatively tight. Therefore, no matter...
Claims
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IPC IPC(8): B01J29/40C10G11/05
Inventor 李春义李晓红山红红杨朝合张建芳
Owner PETROCHINA CO LTD