http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102699011-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W30-82 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B09B3-00 |
| filingDate | 2012-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2014-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102699011-B |
| titleOfInvention | Method for treating waste circuit board by using dimethyl sulfoxide |
| abstract | The invention relates to a method for treating a waste circuit board by using a dimethyl sulfoxide solvent. The method comprises the following steps of: putting dimethyl sulfoxide into a three-mouth flask; putting the waste circuit board, which is cut into fragments, into the dimethyl sulfoxide solvent, wherein the liquid-solid mass ratio of the dimethyl sulfoxide solvent to the waste circuit board is 2:1-5:1; mounting a backflow cooling device above the three-mouth flask; and then putting the waste circuit board fragments into a resistance furnace capable of controlling constant temperature; controlling a heating speed at 5 DEG C/min; and when the temperature reaches 170-180 DEG C, keeping the temperature constant for 10-30 min, wherein epoxy resins in the waste circuit board are pyrolyzed and dissolved in a dimethyl sulfoxide ion liquid at the moment, and the solvent and solid residues can be separated from each other by a filtering technology. As the epoxy resins in the waste circuit board has been pyrolyzed and dissolved in the ion liquid, a pure copper foil can be obtained by a tearing process. In addition, the dimethyl sulfoxide solvent for dissolving the epoxy resins can be regenerated by a reduction rotary evaporation process. Through treating the waste circuit board by the environment friendly ion liquid, the method provided by the invention has the advantages of low cost, simple treatment process and reproducibility of the dimethyl sulfoxide solvent, so that a purpose of recycling the waste circuit board is achieved. |
| priorityDate | 2012-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 17.