Abstract
Abstract Melamine is a key compound used as a clarifying agent for waste lubricating oil primarily due to its excellent adsorbent properties. Moreover, considerable interest exists for the further modification of melamine in order to provide a remediation agent with improved clarification capacity. In this study, hexamethylolmelamine was prepared using a solution of formaldehyde, which provided an agent capable of incorporation into a silicate polymer framework. Subsequently, the resultant monomer was added to a solution of silicate to produce the melamine-silica polymer. The melamine and melamine-silica polymer were characterized using the techniques of XRD, FTIR, SSA and thermal analysis to confirm structural and morphological characteristics. These characterizations indicated that the increase in the surface area of the 0.315 m2/g to melamine to 26.71 m2/g of melamine-silica suggests the effective introduction of silanols groups to hexamethylolmelamine and, therefore, corresponds to thehigh performance in relation to melamine as clarifying of waste lubricant oil.
Highlights
IntroductionTypical remediation processes for waste lubricating oil are comprised of incineration, landfill disposal, and re-refining of base oil
Waste lubricating oil remains an important target for environmental remediation
The polymerization reaction of hexamethylolmelamine and silicate resulted in the synthesis of a highly effective product for treating waste lubricating oil
Summary
Typical remediation processes for waste lubricating oil are comprised of incineration, landfill disposal, and re-refining of base oil. Among these options, the process of re-refining or recovering the base oil is the most desirable from a green chemistry perspective. In the form of melamine-formaldehyde thermoset resins, these compounds are attractive because they resist organic solvents and oils as well as some weak acids and bases[5,6,7,8,9,10]. For the evolution of use of these resins as sorbent materials is due to the presence of of the pendant amino groups that potentially bind to cationic dyes by coordinate-covalent bonding.
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