http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103305848-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1db45dd219ab8c1e40d72559e17b95f0 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23F1-46 |
| filingDate | 2013-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ea860224ccb58bf29a859027dc5b892 |
| publicationDate | 2015-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103305848-B |
| titleOfInvention | Method for preparing etching liquid by purifying and regenerating high-concentration ammonia nitrogen waste liquor |
| abstract | The invention discloses a method for preparing etching liquid by purifying and regenerating high-concentration ammonia nitrogen waste liquor. The method comprises the following steps of: carrying out purifying and impurity-removing on ammonia nitrogen waste liquor; removing heavy metal cation Cu<2+> and Sn<2+> by adding S<2-> in the ammonia nitrogen waste liquor; adjusting a pH value of the ammonia nitrogen waste liquor to 9.5-10.5 by ammonia water or liquid ammonia after purifying and removing impurities; adding auxiliary agent to the obtained ammonia nitrogen waste liquor to obtain the regenerated etching liquid, wherein the auxiliary agent is urea or thiourea. The method for preparing etching liquid by purifying and regenerating high-concentration ammonia nitrogen waste liquor disclosed by the invention can be used for carrying out resource utilization and harmless treatment on the copper-containing etching liquid in the circuit board industry. Moreover, the method is low in energy consumption, capable of creating benefits for the society and capable of reducing burden for the environment. |
| priorityDate | 2013-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.