http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2336436-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_06971ce157d0f8d755d17e92a30b97e8 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B11-26 |
| filingDate | 2001-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a1e21396f5d5d66703658050bb7f8255 |
| publicationDate | 2004-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2336436-C |
| titleOfInvention | Process for producing gypsum from a calcium sulfite gas desulfurization slurry |
| abstract | Calcium sulfate dehydrate (dehydrate gypsum) is produced from an aqueous flue gas desulfurization slurry containing primarily calcium sulfite. The aqueous slurry, containing calcium sulfite, is charged, at a pH of about 5.8 to 6.0 into the top of a vertically oriented pressurized oxidation vessel and passed downwardly therethrough while contacting the aqueous slurry with a countercurrent flow of oxygen-containing gas. The pressure in the bottom portion of the oxidation vessel is maintained at about 22-32 psig, and a pressure in the top portion of the oxidation vessel is maintained at about 10-17 psig. The aqueous slurry is maintained at a pH of about 4.0-5.5 and at a temperature of between about 180-217°F in the vessel such that calcium sulfite in the aqueous slurry is oxidized to dehydrate gypsum with the oxidized slurry removed from the bottom of the oxidation vessel. |
| priorityDate | 2000-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.