Catalytic conversion method
A catalytic conversion method and catalyst technology, applied in the field of efficient utilization of petroleum resources, can solve problems such as underutilization of gasoline latent content, low propylene yield, increased dry gas yield, etc., to achieve improved utilization efficiency of petroleum resources, oil slurry The effect of reduced productivity and improved operating cycle
Active Publication Date: 2014-04-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0010] The above-mentioned prior art still has deficiencies in the design of the alkane molecular cracking reaction, resulting in a substantial increase in the dry gas yield under the condition of increasing the propylene yield. Utilization, resulting in low propylene yield, while there is room for improvement in gasoline yield and quality
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Embodiment
[0067] This embodiment is tested according to the flow process of accompanying drawing, raw material oil A and B are respectively used as the easily crackable raw material oil of catalytic cracking and the difficult crackable raw material oil, is tested on the medium-sized device by the riser reactor, and the easy crackable raw material oil enters the reaction In the upper part of zone I (the specific embodiment, the bottom of reaction zone II), the difficult-to-crack raw material oil enters the bottom of reaction zone I, and at the bottom of reaction zone I, the difficult-to-crack raw material oil is heated at a reaction temperature of 640°C and a weight hourly space velocity of 180h -1 , the weight ratio of catalytic cracking catalyst to difficult-to-crack raw oil is 60, and the weight ratio of water vapor to difficult-to-crack raw oil is 0.20 to carry out the cracking reaction; Hourly space velocity 60h -1 , the weight ratio of the catalytic cracking catalyst to the easy-to...
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The invention relates to a catalytic conversion method comprising the following steps of: enabling raw oil to contact with a catalyst which is rich in mesopore zeolite in a reactor to carry out cracking reaction under the conditions that reaction temperature is 420-650 DEG C, weight hourly space velocity is 25-100h<-1>, pressure is between 0.10MPa and 1.0MPa, the weight ratio of the catalyst to raw materials is 1-30 and the weight ratio of water vapors to the raw materials is 0.05-1.0 so as to obtain a reaction product of catalytic wax oil accounting for 12-60 percent by weight of the raw oil; after the catalytic wax oil is extracted through aromatic hydrocarbon, returning raffinate oil to the reactor; and hydrotreating the extracted oil, and then returning to the reactor. The catalytic conversion method converts the heavy raw oil into high-octane petrol and propylene and also greatly reduces the dry gases and the coke yield, thereby realizing the efficient utilization of oil resources.
Description
technical field [0001] The invention relates to a catalytic conversion combined method, especially a method for converting heavy raw materials into high-octane gasoline and propylene, while greatly reducing dry gas and coke yields, thereby realizing efficient utilization of petroleum resources. Background technique [0002] Propylene and other low-carbon olefins are important organic chemical raw materials, and propylene is a synthetic monomer for products such as polypropylene and acrylonitrile. With the rapid growth of demand for derivatives such as polypropylene, the demand for propylene is also increasing year by year. The demand in the world propylene market has increased from 15.2 million tons 20 years ago to 51.2 million tons in 2000, with an average annual growth rate of 6.3%. It is estimated that the demand for propylene will reach 86 million tons by 2010, with an average annual growth rate of about 5.6%. [0003] The methods for producing propylene are mainly ste...
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IPC IPC(8): C10G67/04C10G11/05
Inventor 龙军魏晓丽王子军戴立顺张执刚崔守业
Owner CHINA PETROLEUM & CHEM CORP