http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110004308-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B30-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B30-04 |
| filingDate | 2019-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-07-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-07-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110004308-B |
| titleOfInvention | Impurity removal method of high purity arsenic |
| abstract | The invention relates to an impurity removal method for high-purity arsenic, which comprises the following steps: S1, quartz tube pretreatment; S2, volatilization of surface arsenic; S3, crushing and screening; S4, deep impurity removal. The method utilizes the property that arsenic can be sublimated under vacuum conditions, and provides a method for removing Si, S, Na, Mg, Fe, Zn impurity elements with high-purity arsenic. The method has simple operation, thorough impurity removal, no pollution and high efficiency. , Easy to scale production, low production cost. The purity of the treated product can reach more than 7.5N, the content of Si is less than 10ppb, and the content of S, Na, Mg, Fe, and Zn is less than 2ppb, which meets the requirements of MBE source. |
| priorityDate | 2019-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.