Mixed Phenol Aldehyde Asphaltene Stabilizer
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Solution Overview
Problem
Asphaltenes in petroleum cause deposition and accumulation issues in production and refining operations, leading to production stoppages, catalyst poisoning, and fouling, and existing phenol aldehyde-based stabilizers face challenges in achieving sufficient performance and handling characteristics.
Innovation Solution
A method involving mixed phenol aldehydes derived from two or more unsubstituted or alkyl-substituted monophenols with a specific molar ratio, which are used to stabilize asphaltenes and inhibit deposition, offering improved performance and handling characteristics compared to single-phenol derived aldehydes, and can be combined with synergistic additives for enhanced effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phenol aldehyde-based stabilizers are used to inhibit asphaltene deposition, then asphaltene stabilization is achieved, but handling characteristics and performance sufficiency are inadequate
Solution Approach 1:
The patent changes the molecular weight parameter of the phenol aldehyde stabilizer, using high molecular weight phenol aldehydes (typically greater than 1,000 g/mol, and preferably greater than 5,000 g/mol) to simultaneously improve asphaltene stabilization performance and handling characteristics. This parameter change resolves the contradiction by finding an optimal molecular weight range that provides both sufficient stabilization capability and acceptable handling properties.
Solution Approach 2:
The patent employs composite phenol aldehyde structures formed from the condensation of phenols with formaldehyde, creating complex polymeric structures that combine multiple functional groups. These composite materials provide enhanced asphaltene stabilization through multiple interaction mechanisms while maintaining improved handling characteristics compared to simpler stabilizer molecules.
2Reliability
If high molecular weight phenol aldehydes are used to improve stabilization performance, then asphaltene deposition inhibition is enhanced, but viscosity increases making handling difficult
Solution Approach 1:
The patent optimizes the molecular weight parameter within a specific range (greater than 1,000 g/mol, preferably greater than 5,000 g/mol) to balance two opposing requirements: high enough molecular weight for effective asphaltene stabilization, but not so high that viscosity becomes unmanageable. This controlled parameter change resolves the contradiction between stabilization performance and handling ease.
Solution Approach 2:
The patent introduces structural variations in the phenol aldehyde molecules, creating local differences in molecular architecture (such as different phenol substitutions and polymer chain structures) that allow high molecular weight regions to provide stabilization while maintaining overall fluidity. This local structural optimization enables high performance without excessive viscosity.
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 mixed phenol aldehydes provide improved asphaltene stabilization and deposition inhibition with moderate viscosity, achieving higher molecular weights and better handling, and when used with synergists, further enhance stabilization and deposition control, reducing adverse effects in petroleum hydrocarbon fluids.
Implementation Method 1
contacting the petroleum hydrocarbon fluid with a mixed phenol aldehyde derived from an aldehyde and two or more unsubstituted or alkyl-substituted monophenols
Data Source
AI summary
A method of stabilizing asphaltenes in a petroleum hydrocarbon fluid comprises contacting the petroleum hydrocarbon fluid with a mixed phenol aldehyde derived from an aldehyde and two or more unsubstituted or alkyl-substituted monophenols, the two or more unsubstituted or alkyl-substituted monophenols comprising a first phenol which is a C1-20 linear or branched alkyl monophenol; and a second phenol which is unsubstituted or a C1-20 linear or branched alkyl monophenol different from the first phenol, wherein the molar ratio of the first phenol relative to the second phenol is about 4:1 to about 1:4.