Pyrolytic oil of waste printed circuit board(PCB) was used as raw material to recover crude phenol by the process of alkali dissolution-neutralization-extraction and then to synthetize modified phenolic resin.The optimum synthesis conditions for boric acid-modified phenolic resin are as follows:n(crude phenol)∶n(added phenol)=2∶3,n(crude phenol+added phenol)∶n(methanal)∶n(NaOH)∶n(boric acid)=1∶1.5∶0.15∶0.17.The optimum synthesis conditions for organosilicon-modified phenolic resin are as follows:n(crude phenol)∶n(added phenol)=2∶3,n(crude phenol+added phenol)∶n(methanal)∶n(NaOH)∶n(tetraethyl orthosilicate)=1∶1.3∶0.1∶0.1.The two products can meet the requirements of the standards YB/T 4131-2005 for thermosetting liquid resin PFn-5301.

A bench-scaled experiment was conducted to recycle oil from pyrolyzing waste printed circuit boards of FR-4 type.This paper presents an innovative alkali treatment-adidification-extraction-vacuum distillation method to extract and separate oil,as well as the characterization of the components in the pyrolytic oil using GC-MS,which shows total phenols account for 62.0% in the oil and the best purity obtained is as high as 96.51%.

Two novel pyridine-2,6-dicarboxylic acid derivatives of mono-β-diketone named methyl 6-biphenylacetyl-2-pyridinecarboxylate (MBP) and 6-biphenylacetyl-2-pyridinecarboxylic acid (BAA) and their corresponding binary complexes Tb(MBP)3.6H2O and Tb(BAA)3·6H2O were synthesized. The ligands were characterized by elemental analysis, FT-IR and 1H-NMR, and the complexes were characterized with elemental analysis, FT-IR, 1H-NMR and thermogravimetric and differential thermal analysis(TG-DTA). The investigation of fluorescence properties of the complexes Tb(MBP)3·6H2O and Tb(BAA)3·6H2O showed that the introduction of the biphenyl enlarged the π-conjugated system of the ligands and enhanced the luminescent intensity of the complexes. The Tb(III) ion could be sensitized more efficiently by the ligands, in particular, the fluorescence intensity of the complex Tb(BAA)3·6H2O was about 20% higher than that of Tb(MBP)3·6H2O and 30% higher than that of Tb(III) complexes with bis-β-diketone-type ligands that we have previously reported.

N-butyl acetate was synthesized by using ammonium ferric sulfate dodecahydrate as catalyst with microwave irradiation method.The influences of the power of microwave radiation,reaction time,mole ratio of glacial acetic acid to n-butanol,a mount of catalyst and the water diversion on esterfication were discussed and the optimum processing condition was found.The optimum condition of the synthesis of n-butyl acetate which was decided by single-factor experiments as fowllows: power of microwave radiation 240 W,radiation time15 min,the amount of catalyst 1.3 g;mole ratio of glacial acetic acid to n-butanol 1.2:1.0,and yield 82.3%.The method was distinguished for it's virtues: short time,mild condition,simple post-pressing and good for environment.

This paper reviewed the advance in the treatment of nonmetal material in waste printed circuit board (PCB) in the world. Focued on the application status of waste PCB treated with pyrolysis, and introduced effective recycling methods of pyrolysis oil to use utmost effectively the nonmetallic in waste PCB.