Liquefaction of printed circuit board wastes with product oil recycling

Experimentally, liquefaction of printed circuit board wastes in motor oil a t 593 K for 30 minutes generated approximately 73% of oils, 4% of gases, an d 23% of copper-rich solid residues. The cuts of the light oils produced fr om liquefaction of printed circuit board wastes into weighted boiling fract ion were primarily naphtha and gas oil. Over 90 % of copper in liquefaction residue was recovered. An increase in aromaticity in product oils observed by proton NMR and FTIR spectroscopies was attributed to repolymerization o r condensation, to some extent, involved in the liquefaction process.