Oleic Acid Lubricant Composition for Ethylene Reactor Clogging
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Solution Overview
Problem
Self-polymerization of ethylene and comonomers during high-pressure polymerization processes leads to equipment defects such as clogging and reduced production yield, with existing methods failing to effectively prevent these issues.
Innovation Solution
A lubricant composition comprising a base oil, a friction-reducing agent (e.g., oleic acid), and an antiwear agent (e.g., a phosphoric acid compound) is used to reduce friction and prevent wear on equipment surfaces, thereby inhibiting self-polymerization and enhancing process stability and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high pressure and temperature are applied to supply ethylene and comonomer to the reactor, then polymerization reaction can proceed, but self-polymerization occurs causing equipment clogging and plugging
Solution Approach 1:
A lubricant composition comprising a base oil, friction-reducing agent, and antiwear agent is introduced as an intermediary substance between the ethylene/comonomer mixture and the equipment surfaces. This lubricant film prevents direct contact and reduces friction, thereby preventing self-polymerization-induced clogging while allowing the polymerization reaction to proceed efficiently
Solution Approach 2:
The invention changes the physical and chemical parameters of the system by adding specific lubricant components (friction-reducing agent at 0.01-1.0 wt% and antiwear agent at 0.01-0.5 wt%) that modify the surface properties and reduce friction coefficients, preventing the conditions that lead to self-polymerization and equipment plugging
2Strength
If friction-reducing agent content is increased to reduce friction, then wear resistance improves, but excessive friction reduction may affect polymerization efficiency
Solution Approach 1:
The invention optimizes the concentration parameters of the lubricant components, specifically setting the friction-reducing agent content at 0.01-1.0 wt% and antiwear agent at 0.01-0.5 wt% based on total lubricant composition. These controlled parameter ranges ensure sufficient wear protection while maintaining polymerization efficiency
Solution Approach 2:
The lubricant composition is formulated as a composite system combining base oil, friction-reducing agent, and antiwear agent in specific proportions. This composite approach balances the competing requirements of wear resistance and polymerization efficiency, as each component contributes differently to the overall performance
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 lubricant composition effectively reduces friction and wear, preventing equipment defects and improving the efficiency and yield of ethylene-based polymer production by forming a protective layer on metal surfaces and suppressing self-polymerization.
Implementation Method 1
a friction-reducing agent which includes oleic acid
Implementation Method 2
an antiwear agent which includes a phosphoric acid compound
Data Source
AI summary
A lubricant composition according to embodiments of the present disclosure may include a base oil, a friction-reducing agent which includes oleic acid, and an antiwear agent which includes a phosphoric acid compound. The friction-reducing agent may be included in the lubricant composition in a predetermined amount such as an amount of 0.02 wt % to 0.9 wt % based on a total weight of the lubricant composition.