Fast copper extraction from printed circuit boards using supercritical carbon dioxide

2015 ◽  
Vol 45 ◽  
pp. 289-297 ◽  
Author(s):  
C.O. Calgaro ◽  
D.F. Schlemmer ◽  
M.D.C.R. da Silva ◽  
E.V. Maziero ◽  
E.H. Tanabe ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Printed Circuit Boards ◽  
Copper Extraction ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Supercritical Carbon

Recycling of Printed Circuit Boards Employing Supercritical Carbon Dioxide

2019 ◽  
Vol 959 ◽  
pp. 100-106 ◽  
Author(s):  
Kai Egerer ◽  
Florian Brandl ◽  
Nahal Golzari ◽  
Sabine Beuermann
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Printed Circuit Boards ◽  
Ternary Mixtures ◽  
Circuit Board ◽  
Size Exclusion ◽  
Original Material ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Supercritical Carbon

Printed circuit boards are currently coated with Br-containing epoxy resins. With respect to recycling of the material removal of the halogen is important. Moreover, it appears important to test whether recycling of the coating is feasible. The resin from circuit board reference material was extracted with extraction media containing supercritical carbon dioxide. It is shown that ternary mixtures containing 2-propanol and water allow for the complete removal of the coating. In contrast to the original material the degraded coating is soluble in organic solvents and size-exclusion chromatograpy indicates the formation of very regular fragments.

scholarly journals Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor

2015 ◽  
Vol 41 ◽  
pp. 148-158 ◽  
Author(s):  
Michael L.M. Rodrigues ◽  
Versiane A. Leão ◽  
Otavio Gomes ◽  
Fanny Lambert ◽  
David Bastin ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Thermophilic Bacteria ◽  
Copper Extraction ◽  
Rotating Drum ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Rotating Drum Reactor
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