Method and system for processing coker gasoline and heavy feedstocks using risers
A technology of coking gasoline and riser, which is applied in the treatment of hydrocarbon oil, petroleum industry, and only multi-stage series refining and cracking process treatment. Solve the shortage of petrochemical raw materials, improve the performance of catalytic cracking reaction, and increase the yield
Active Publication Date: 2021-11-16
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0009] Among the above methods, the method of hydrofining can reduce its impurity and olefin content, improve stability, and be used as a gasoline blending component, but because of its low octane number, it will still have a great impact on the octane number of the gasoline pool in the refinery
Coked gasoline can be directly sent to the catalytic cracking unit for cracking. The problem is that the high nitrogen content will accelerate the deactivation of the cracking catalyst and affect the product distribution. At the same time, the alkane cracking activity in gasoline is low, and a large amount of unreacted alkane enters the gasoline product. Affect gasoline octane rating
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Embodiment 1
[0095] according to figure 1 The raw material oil is coking gasoline raw material, and the adsorption and separation reaction is carried out on a fixed-bed adsorption-desorption reactor. The n-paraffin adsorbent is 5A molecular sieve. Speed 1.0 hours -1 ; Desorption treatment conditions: the desorption gas is nitrogen, and the weight hourly space velocity of the desorption gas is 150 hours -1 , temperature 360°C. The nitrogen content in the absorbed oil is 350 μg / g, the normal paraffin content in the desorbed oil is 95% by weight, and the nitrogen content is 10 μg / g. The desorbed oil and absorbed oil produced by coking gasoline through adsorption and separation enter the heating furnace and are heated to 420°C.
[0096] The catalytic cracking reaction is carried out on the medium-sized device of the riser reactor. The preheated desorbed oil enters the lower part of the riser reactor, and the preheated heavy feed oil enters the middle and lower part of the riser reactor fr...
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Abstract
The invention relates to a method and system for processing coked gasoline and heavy feedstock oil by adopting a riser. The method includes: introducing the coked gasoline raw material into an adsorption-desorption reactor to contact with a normal alkane adsorbent and performing adsorption and separation reaction; The obtained adsorbent with adsorbed normal alkanes is desorbed with desorption gas; the desorbed oil, absorbed oil and heavy raw material oil are introduced into the riser reactor and contacted with the catalytic cracking catalyst for catalytic cracking reaction to obtain the reaction Products and unborn catalyst; wherein, according to the flow direction of the reaction materials in the riser reactor, the feed port of the desorbed oil is upstream of the feed port of the absorption oil. The method and system of the present invention are used to process coker gasoline and heavy feed oil with high propylene and butene yields.
Description
technical field [0001] The present invention relates to a method and system for processing coker gasoline and heavy feed oil using a riser. Background technique [0002] Propylene and butene are important basic raw materials for the petrochemical industry. Currently, about 62% of the world's propylene comes from the co-production of steam cracking to ethylene. Steam cracking technology has been perfected day by day, and it is a process that consumes a lot of energy, and is limited by the use of high-temperature materials, so the potential for further improvement is very small. [0003] Coking is an important thermal processing process in petroleum refining. The coked gasoline produced during the coking process is a low-quality gasoline rich in olefins and high in impurities such as sulfur, nitrogen compounds and dienes, and has odor, poor stability and octane number. Low-level characteristics, must be secondary processing to improve its performance. [0004] USP5685972 di...
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IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/202C10G2300/4006C10G2300/70
Inventor 王迪龚剑洪魏晓丽
Owner CHINA PETROLEUM & CHEM CORP