Single Gas Phase Reactor Polyolefin Production
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Solution Overview
Problem
Existing polyolefin manufacturing processes using multiple gas phase reactors face challenges in achieving homogeneous polymer production, require frequent inspections due to valve issues, and necessitate additional facilities, leading to inefficiencies and instability.
Innovation Solution
A polyolefin manufacturing apparatus comprising a loop reactor and a single gas phase reactor, where the volume ratio of the gas phase reactor to the loop reactor is 1.2 or more, allowing for continuous polymerization and production of polyolefin with high ethylene-propylene rubber content without the need for multiple gas phase reactors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple gas phase reactors are connected in series to produce high molecular weight polyolefin, then the mechanical properties of the polyolefin are improved, but the homogeneity of the produced polymer is deteriorated due to differences in molecular weight, chemical composition and crystallinity in the respective reactors
Solution Approach 1:
The process is divided into two distinct functional sections: a loop reactor for producing high molecular weight polyolefin and a single gas phase reactor for producing ethylene-propylene rubber. This segmentation allows each reactor to be optimized for its specific function, with the loop reactor maintaining homogeneous conditions for high MW polymer production while the gas phase reactor separately manages rubber production, thereby resolving the homogeneity issue while achieving the desired mechanical properties
Solution Approach 2:
The patent combines the loop reactor and gas phase reactor into a unified system where the loop reactor produces both polyolefin and ethylene-propylene rubber, which are then fed to the gas phase reactor for final polymerization. This merging approach allows the system to achieve high molecular weight polyolefin with high rubber content (30% or more) while maintaining homogeneity through integrated process control and single gas phase reactor operation
2Quantity of substance
If a Double GPR system is used to produce polyolefin with high ethylene-propylene rubber content, then the rubber content is improved, but frequent inspections are required due to valve troubles during particle transfer
Solution Approach 1:
The patent extracts and eliminates the problematic valve-based particle transfer system by using a single gas phase reactor that receives material directly from the loop reactor without intermediate transfer valves. This removal of the valve component eliminates the source of valve troubles and reduces inspection frequency while maintaining the ability to produce polyolefin with high ethylene-propylene rubber content (30% or more)
Solution Approach 2:
The single gas phase reactor serves multiple functions: it receives polyolefin from the loop reactor, incorporates ethylene-propylene rubber into the polymer matrix, and produces the final high-value polyolefin product. This multi-functionality eliminates the need for separate particle transfer systems and valves, thereby improving reliability and reducing inspection requirements while achieving high rubber content
3Strength
If a Double GPR system is implemented, then high molecular weight polyolefin can be produced, but additional facilities such as recycle compressor, gas separation/recovery facility and particle transfer facility are required
Solution Approach 1:
The patent merges the functions of multiple facilities into a streamlined system where the loop reactor and single gas phase reactor operate as an integrated unit. The gas phase reactor directly receives material from the loop reactor without requiring separate particle transfer facilities, and the combined system eliminates the need for recycle compressors and gas separation/recovery facilities while still producing high molecular weight polyolefin
Solution Approach 2:
The patent extracts and removes unnecessary additional facilities (recycle compressor, gas separation/recovery facility, particle transfer facility) by designing a process where the single gas phase reactor directly processes material from the loop reactor. This extraction simplifies the overall system while maintaining the capability to produce high molecular weight polyolefin with high ethylene-propylene rubber content
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 configuration enables efficient and stable production of polyolefin with high ethylene-propylene rubber content, improving process efficiency by eliminating the need for additional facilities and reducing the complexity of reactor systems.
Implementation Method 1
an apparatus for producing a prepolymer or a polymer by continuously polymerizing an olefin monomer
Data Source
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AI summary
The present invention provides an apparatus for manufacturing a polyolefin comprising a single gas phase reactor. The apparatus for manufacturing a polyolefin according to exemplary embodiments is an apparatus for producing a prepolymer or a polymer by continuously polymerizing an olefin monomer, and includes: a loop reactor including a first reaction space; and a single gas phase reactor including a second reaction space into which a first product produced in the loop reactor is introduced, wherein the volume ratio of the second reaction space to the first reaction space is adjusted to 1.2 or more. Therefore, it is possible to prepare a polyolefin including high content ethylene-propylene rubber such as impact polypropylene, only by the configuration of a single gas phase reactor without having a plurality of gas phase reactors.