Asphalt Binder Production via Solvent Deasphalting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Asphalt binders derived from high viscosity and high asphaltene content petroleum feedstocks, such as bitumen vacuum bottoms, are too brittle to meet low temperature elasticity requirements, necessitating costly processing into synthetic crude, which limits their use in pavement applications.
Innovation Solution
A method involving solvent deasphalting of high-asphaltene content petroleum feedstocks to produce partially deasphalted oil, which is then blended with the original feedstock to create an asphalt binder with improved temperature performance, allowing for the production of asphalt binders that meet both high and low temperature specifications without expensive processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bitumen vacuum bottoms are used as asphalt binder, then high temperature performance is improved, but low temperature elasticity deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters of the asphalt binder by controlling asphaltene content through selective processing. By adjusting the asphaltene concentration to specific ranges (5-20% for cold climates, 15-30% for hot climates), the binder achieves optimal balance between high temperature strength and low temperature elasticity, resolving the contradiction between these two performance requirements.
Solution Approach 2:
The invention applies different asphaltene concentrations to different climate conditions, creating locally optimized binder formulations. Cold climate binders use lower asphaltene content (5-20%) for better elasticity, while hot climate binders use higher asphaltene content (15-30%) for superior high temperature performance, allowing the same base material to adapt to different environmental requirements.
2Adaptability or versatility
If solvent deasphalting is performed to improve low temperature elasticity, then low temperature performance is improved, but high temperature performance deteriorates
Solution Approach 1:
Instead of complete deasphalting, the invention applies partial deasphalting to achieve the minimum necessary asphaltene reduction for low temperature elasticity while retaining sufficient asphaltene content for high temperature performance. The controlled removal of asphaltenes to specific concentration ranges prevents over-processing that would compromise high temperature strength.
3Strength
If heavy oil is processed to produce asphalt binder, then asphaltene content increases improving high temperature performance, but viscosity increases causing brittleness
Solution Approach 1:
The invention transforms the harmful effect of high viscosity by changing the asphaltene concentration parameter to optimal ranges. By controlling asphaltene content rather than simply reducing viscosity, the binder maintains adequate viscosity for high temperature performance while eliminating excessive brittleness through proper compositional balance.
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 method enables the production of asphalt binders with a wide temperature range, meeting performance grades for various climates, thereby transforming low-value feedstocks into high-value products without requiring costly processing or equipment.
Implementation Method 1
performing solvent deasphalting on the high-asphaltene content petroleum feedstock to produce a partially deasphalted oil and an asphaltene-rich residue
Implementation Method 2
subjecting the crude petroleum feedstock to vacuum distillation at the selected vacuum distillation cut temperature
Data Source
AI summary
Asphalt binders and related methods and uses are provided. In some embodiments, the asphalt binder is produced by: providing a high-asphaltene content petroleum feedstock; performing solvent deasphalting on the feedstock to produce a partially deasphalted oil and an asphaltene-rich residue; and collecting the partially deasphalted oil (DAO). The high-asphaltene content petroleum feedstock may comprise residue from vacuum distillation or flash separation of extra heavy oil or bitumen, or recycled asphalt. The DAO may itself be used as the asphalt binder or may be a component of a blend with the original feedstock. Asphalt binders may also be produced by blending residue and heavy distillate produced from vacuum distillation or flash separation, with DAO or the asphaltene-rich residue of the solvent deasphalting process. The disclosed methods allow for production of asphalt binders of a wide variety of performance grades.