RESEARCH PROGRESS ON RESOURCE UTILIZATION OF DEOILED ASPHALT

Abstract

Abstract: Deoiled asphalt (DOA) is a by-product generated from the solvent deasphalting process, characterized by high heteroatom content, high metal content, high asphaltene content, high softening point, and complex structure. As the heavy feedstock trend of crude oil intensifies, DOA production continues to grow, making its resource utilization a critical link in the green transformation of the refining and petrochemical industry. This review systematically summarizes the preparation process, chemical composition, and structural characteristics of DOA, with emphasis on its application advances in three major domains: building materials, energy conversion, and high-performance carbon materials. Current technical bottlenecks, economic constraints, and environmental risks are analyzed. It is pointed out that future efforts should focus on green modification, expansion of high-value utilization pathways, and multi-process integrated co-production strategies, to promote the transformation of DOA from a low-value by-product to a high-value product, thereby supporting efficient utilization of all heavy oil components and vigorously promoting the sustainable development of the solvent deasphalting process.

Key words: deoiled asphalt, solvent deasphalting, resource utilization, road engineering materials, carbon materials

References

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