C5 Hydrocarbon Processing for Isopentane and Isoamylene Extraction
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Solution Overview
Problem
Conventional hydrocarbon cracking processes in petroleum refineries often recycle C5 hydrocarbon streams back to cracker furnaces without utilizing their full potential, missing opportunities for valuable isopentane and isoamylene production.
Innovation Solution
A process involving hydrodesulfurization, separation, deisopentanization, and reaction steps to produce isopentane and isoamylene from C5 hydrocarbon streams, utilizing a hydrodesulfurization assembly, separation assemblies, a deisopentanizer, and a reactor to extract these valuable products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If C5 hydrocarbon streams are sent back to cracker furnaces for further cracking, then the cracking process continues, but valuable isopentane and isoamylene production is lost
Solution Approach 1:
The patent extracts isopentane and isoamylene from the C5 hydrocarbon recycle stream through a dedicated separation and reaction process. A deisopentanizer column separates isopentane, while a reactor with catalyst converts isoamylene precursors. This extraction prevents these valuable chemicals from being lost when streams are simply recycled to furnaces.
Solution Approach 2:
The patent changes the processing parameters by introducing a specific reaction temperature range (300-500°C) and pressure conditions (1-10 atm) in the reactor, along with catalyst selection, to transform the C5 hydrocarbon stream into valuable isopentane and isoamylene products rather than simply recycling them.
2Duration of action of stationary object
If C5 hydrocarbon streams are recycled to cracker furnaces, then cracking operations continue, but cracker run length is reduced
Solution Approach 1:
By extracting and removing isopentane and isoamylene from the C5 hydrocarbon stream through the deisopentanizer and reactor system, the patent prevents these valuable chemicals from accumulating in the recycle stream. This extends cracker run length by maintaining better feedstock quality while simultaneously producing the extracted chemicals as valuable products.
3Object-generated harmful factors
If C5 hydrocarbon streams are recycled without processing, then the process is simple, but coke formation increases
Solution Approach 1:
The patent applies preliminary action by processing the C5 hydrocarbon stream through hydrodesulfurization, separation, and catalytic conversion before it enters the cracker furnaces. This preliminary treatment removes sulfur compounds and transforms problematic hydrocarbons, reducing coke formation in subsequent cracking operations while maintaining system feasibility.
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
This process effectively converts C5 hydrocarbon streams into commercially valuable isopentane and isoamylene, reducing isopentane in recycle streams and enhancing cracker run length, while also reducing coke formation by separating C6+ hydrocarbons.
Implementation Method 1
passing a feed stream comprising C5 hydrocarbons through a hydrodesulfurization assembly to produce a first stream
Implementation Method 2
passing the first stream to a first separation assembly to produce a second stream and a first separated stream
Implementation Method 3
passing the raffinate stream to a reactor assembly to produce a reaction product stream comprising isoamylene
Data Source
AI summary
A process for producing isopentane and isoamylene can comprise passing a feed stream comprising C5 hydrocarbons through a hydrodesulfurization assembly to produce a first stream: passing the first stream to a first separation assembly to produce a second stream and a first separated stream: passing the second stream to a deisopentanizer assembly to produce a second separated stream comprising isopentane, a third separated stream comprising C6+ hydrocarbons, and a raffinate stream comprising C5 hydrocarbons; and passing the raffinate stream to a reactor assembly to produce a reaction product stream comprising isoamylene. The present disclosure also provides for a system for producing isopentane and isoamylene.