Catalytic cracking aid for producing isomerized low-carbon olefins and its preparation method and application

A technology for catalytic cracking aids and low-carbon olefins, which is used in hydrocarbon cracking to produce hydrocarbons, carbon compound catalysts, catalysts, etc., can solve problems such as low propylene content, and achieve the effect of reducing gasoline loss
CN107282099BActive Publication Date: 2020-01-07李瑛
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
李瑛
Publication Date
2020-01-07

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Abstract

The invention relates to a catalytic cracking aid for producing isomeric low-carbon olefins and its preparation method and application. On a dry basis, the catalytic cracking aid for producing isomeric low-carbon olefins, based on the total weight of the catalytic cracking aid, includes: 15 to 45% by weight of alkali-modified ZSM-5 molecular sieve; 1 to 20% by weight % of mesoporous ZSM‑5 molecular sieve; 1 to 10% by weight of beta zeolite; 3 to 25% by weight of P 2 O 5 ; 3 to 25% by weight of inorganic oxides; and the balance clay. The catalytic cracking aid of the present invention that produces high amounts of isomeric low-carbon olefins can promote the shape-selective isomerization cracking reaction of gasoline components above C8 in catalytically cracked gasoline, and can simultaneously increase the yields of propylene, isobutylene and isoamylene, and improve liquefaction. The propylene content in the gas increment (Δpropylene / Δliquefied gas) is increased and high-octane gasoline is co-produced.
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Description

technical field

[0001] The present invention relates to a catalytic cracking additive capable of producing isomeric low-carbon olefins and its preparation method and application; it is applicable to the catalytic cracking of prolific propylene, isobutene and isopentene in a catalytic cracking process, and belongs to the field of petroleum refining process . Background technique

[0002] With the rapid development of the petrochemical industry, the demand for propylene continues to grow. In 2013, the domestic demand for propylene was 17.1 million tons / year, and the output was about 14.6 million tons / year, showing a large gap between supply and demand. There are many technological schemes for producing propylene in the petrochemical process, such as traditional naphtha steam cracking method, metathesis reaction technology of ethylene and butene, butene disproportionation reaction (CN1618512A, CN1618515A), propane dehydrogenation technology (CN1073893A), Methanol to propylene...

Claims

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