A method and system for processing coker gasoline and heavy feedstock oil using a variable-diameter riser
A coking gasoline and riser technology, applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve problems such as the influence of gasoline pool octane number in refineries, accelerated cracking catalyst deactivation, and gasoline octane number impact , to achieve the effect of solving the shortage of petrochemical raw materials, improving the performance of catalytic cracking reaction, and increasing the yield
Active Publication Date: 2021-11-16
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0102] 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.
[0103]The catalytic cracking reaction is carried out on a medium-sized riser reactor. The ratio of the height of the first reaction zone to the second reaction zone is 1:1, and the ratio of the inner diameter of the second reaction zone to the first reaction zone...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
Login to View More
Abstract
The present invention relates to a method and system for processing coked gasoline and heavy raw material oil by adopting a variable-diameter riser. The method comprises: introducing the coked gasoline raw material into an adsorption-desorption reactor, contacting with a normal alkane adsorbent and performing adsorption and separation reaction ; The obtained adsorbent having normal alkanes is desorbed using desorption gas to obtain desorbed adsorbent and desorbed oil; the desorbed oil and heavy feed oil are introduced into the first reaction of the riser reactor The zone is in contact with the catalytic cracking catalyst and carries out the first catalytic cracking reaction; the oil agent obtained in the first reaction zone is sent into the second reaction zone to contact with the absorption oil and carry out the second catalytic cracking reaction. 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 invention relates to a method and a system for processing coker gasoline and heavy raw material oil using a variable-diameter riser. Background technique [0002] Propylene and butene are important basic raw materials for the petrochemical industry. Currently, about 62% of 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] USP56...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C10G25/08C10G25/03
CPCC10G25/03C10G25/08C10G67/02C10G2300/1037C10G2300/1077C10G2300/202C10G2300/70
Inventor 王迪龚剑洪魏晓丽
Owner CHINA PETROLEUM & CHEM CORP