http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2662336-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_772a6d74352e3b18e33d917fa5f3e31e |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5236 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-901 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-372 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-375 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-0532 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-37 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G23-053 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-90 |
| filingDate | 2013-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df0945fdaed9b7f33e319a15010d75eb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e1ae67c594a1e301563cdbb0c044d4be http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_68130fab9a3f00df12e2702502ae86c4 |
| publicationDate | 2013-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-2662336-A2 |
| titleOfInvention | Method for purification of spent sulfuric acid from titanium dioxide rutile industry |
| abstract | A method for the purification of spent sulfuric acid and particularly the purification of spent acid, from titanium dioxide rutile manufacture through a chloride route, is provided. In the chloride route of titanium dioxide manufacture, sulfuric acid is used to clean the un-reacted gaseous flow coming out of the oxidizer, so the spent acid mainly contains un-reacted Ti 4+ ions, trace amounts of Fe 3+ ions, and NO 2 gas. Titanium phosphate can be precipitated using acidic and or alkaline phosphate-containing precipitants in stoichiometric amounts. The method can include the addition of cutting water to commence the precipitation in two or more steps, when an acidic precipitant is used, and in one step with half the volume of water when an alkaline precipitant is used. NO 2 gas evolved during the reaction can be scrubbed in water. The resulting aqueous acid-rich portion, or supernatant, can be separated from the precipitated phosphates and is very clear. Evaporation under vacuum conditions can increase the sulfuric acid concentration. The resultant purified acid can be re-used for titanium dioxide production or for other suitable purposes. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103693683-A |
| priorityDate | 2012-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.