Catalytic Conversion Optimizing Isobutene and Olefin Distribution
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Solution Overview
Problem
Conventional catalytic cracking techniques fail to adequately optimize product distribution, particularly in increasing isobutene content in liquefied petroleum gas and olefin content in gasoline, while also minimizing dry gas and coke yields.
Innovation Solution
A catalytic conversion process involving a hot regenerated catalyst with lower activity, used in a commercial catalytic cracking unit, where the feedstock oil is contacted with the catalyst in a reactor to perform cracking, followed by selective hydrogen transfer and isomerization reactions, optimizing reaction conditions such as temperature, time, and catalyst/oil ratio to enhance isobutene and olefin content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional catalytic cracking techniques are used to increase octane number of gasoline, then octane number is improved, but olefin content in gasoline increases excessively
Solution Approach 1:
The patent applies parameter changes by optimizing reaction temperature (450-620°C), reaction time (0.5-35s), and catalyst activity (35-55) to achieve the desired balance between octane number and olefin content. By carefully controlling these parameters, the process produces gasoline with octane number 90-93 and olefin content 20-40 wt%, resolving the contradiction between high octane number and excessive olefin content.
2Strength
If conventional catalytic cracking techniques are used to increase octane number of gasoline, then octane number is improved, but isobutene content in liquefied petroleum gas remains insufficient
Solution Approach 1:
The patent uses parameter changes by optimizing reaction temperature (450-620°C), reaction time (0.5-35s), and catalyst activity (35-55) to achieve the desired balance between octane number and isobutene content. By carefully controlling these parameters, the process produces gasoline with octane number 90-93 and isobutene content in liquefied petroleum gas 20-40 wt%, resolving the contradiction between high octane number and insufficient isobutene content.
3Productivity
If conventional catalytic cracking techniques are used to produce gasoline with high yield, then gasoline yield is improved, but product distribution is not adequately optimized
Solution Approach 1:
The patent applies parameter changes by optimizing reaction temperature (450-620°C), reaction time (0.5-35s), and catalyst activity (35-55) to achieve the desired balance between gasoline yield and product distribution. By carefully controlling these parameters, the process produces gasoline with yield 35-50 wt% and optimized product distribution with isobutene content 20-40 wt% and olefin content 20-40 wt%, resolving the contradiction between high gasoline yield and adequate product distribution optimization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process significantly increases isobutene content in liquefied petroleum gas by over 30% and olefin content in gasoline to more than 30 wt.%, while reducing dry gas and coke yields, thereby improving product distribution and resource utilization.
Implementation Method 1
a hot regenerated catalyst having a lower activity (average activity) is used in a commercial catalytic cracking unit, where the feedstock oil is contacted with the catalyst in a reactor to perform cracking
Implementation Method 2
followed by selective hydrogen transfer and isomerization reactions, optimizing reaction conditions such as temperature, time, and catalyst/oil ratio to enhance isobutene and olefin content
Implementation Method 3
followed by selective hydrogen transfer and isomerization reactions, optimizing reaction conditions such as temperature, time, and catalyst/oil ratio to enhance isobutene and olefin content
Data Source
AI summary
The present invention relates to a catalytic conversion process for improving the product distribution, characterized in that a feedstock oil of good quality is contacted with a hot regenerated catalyst having a lower activity in a reactor to carry out a cracking reaction, the reaction product is separated from the spent catalyst to be regenerated, then the reaction product is fed into a separation system, and the spent catalyst to be regenerated is stripped, regenerated and recycled in the process. The isobutene content in the liquefied petroleum gas (LPG) produced by the process is increased by a factor of more than 30%, and the olefin content in the gasoline composition may be increased to more than 30 wt. %. The product distribution is optimized, and the yields of dry gas and coke are decreased, so as to sufficiently utilize the petroleum resources.