http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1682313-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_65550c1df5431908aa49e2bd6e25805a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G28-00 |
| filingDate | 1989-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1991-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f451a22fdd02e2086d467f7eefc9cb0e |
| publicationDate | 1991-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1682313-A1 |
| titleOfInvention | Method for obtaining arsenic sulfide |
| abstract | This invention relates to the field of inorganic chemistry, in particular, to methods for preparing a five-grained arsenic. In order to obtain a grained arsenic, waste refining solutions of the refining production, purified from impurities by H-cationation, containing arsenic (V) 18.5 g / l (mouse acid 35.04 g / l) and sulfuric acid 189.8 g / l Sulfuric sodium, acidic sulphurous sodium and their mixtures in the form of solutions with a sulfide ion content of 12.5-80.1 g / l are used as the sulfide reagent. The deposition is carried out in a closed reactor with a working volume of 1 l. The solution is poured into the reactor and supplied with stirring for 60-80 minutes at 16-25 ° C sulfide reagent. At the end of the precipitation, the suspension is kept for 5 hours at 16-70 ° C in order to coagulate the precipitate and remove traces of hydrogen sulfide. Reagent consumption coincides with the theoretical. The suspension is filtered on a vacuum filter to stop the outflow of the mother liquor. The filtered product is washed with a solution of sulfuric and mouse acids, then with water. Duration of washing is 5-10 min. The washed precipitate is dried and the moisture content is calculated from the difference in the mass of the dry and wet product. The yield of the product is 99.89% of the theoretical, the residual content of the mouse in the solution is 30 mg / l. The invention makes it possible to reduce the cost of the process by reducing the moisture content of the product by 9.24-9.38%, while significantly reducing the consumption of heat-transfer agent for drying the product. 1 tab. |
| priorityDate | 1989-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.