A cost-effective approach for decontamination of used lubricant oil: enhanced recovery of base oil using different adsorbents

Assessing the efficacy of three bio‐based flocculants in the reclamation of spent lubricating oil

“…The secondary pollutant (sludge) obtained from the extraction-flocculation process can be directly supplied to the ink industry as it can act as a raw material for the production of news ink. [5] Since the carbon content of this secondary sludge is higher, thus, it can also be utilized for ecofriendly road making and construction materials. [5,33] 2.6 | Characterization of refined oil…”

“…[5] Since the carbon content of this secondary sludge is higher, thus, it can also be utilized for ecofriendly road making and construction materials. [5,33] 2.6 | Characterization of refined oil…”

“…When these toxic components start to burn, they become dangerous. [ 5 ] Waste management is a fundamental issue across the world with various challenges, such as an increase in waste generation and environmental effects. [ 6 ] Waste management can be categorized based on various factors, including practices, strategies, goals, control, monitoring, and regulation of the production, financial, and marketing aspects to the environmental assessment of various treatments, evaluations, and policies.…”

“…[ 10 ] With the increasing price of raw materials, recycling waste oil has become an economically attractive proposition as much as a way of minimizing environmental hazards while also helping conserve a scarce of non‐renewable resources and produce high‐quality base stock. [ 5,11 ] Several re‐refining methods such as acid/clay, solvent extraction, vacuum distillation, hydrotreating, thermal de‐asphalting, thin film evaporation, and thermal de‐asphalting with clay finishing have emerged in recent years that promise to address the technical, economic feasibility, and environmental burden associated with used oil recycling. [ 9,12 ] However, the combined technologies such as Kinetic Technology International (KTI), Snamprogetti, Vaxon process, and Axen‐Revivoil are comparatively expensive as they require high energy, sophisticated instruments, and skilled human resources.…”

“…The result obtained from the above investigation portrays that with iso‐butanol/MEA, the yield increases from 81% to 83%, which is achieved after 20 min of refining time. [ 5 ] The reconditioning of waste lubricant using numerous adsorbents such as silica, activated clay, and conducting polymer was investigated. Several fuel characteristics such as aniline point, pour point, total acid number, and specific gravity have been evaluated.…”