| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_461e1cafc2023eb58eb915338586736f |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S210-911
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S210-914
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F9-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5236
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-722 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-78 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F9-00 |
| filingDate |
1998-04-03^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d7de1270f5fdd64a4b05196f06986b9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78c57b308cc86259c4e852535a5b75a5 |
| publicationDate |
1998-10-29^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9847823-A1 |
| titleOfInvention |
Removal of hydrocarbons, mercury and arsenic from oil-field produced water |
| abstract |
A process is disclosed which involves removing hydrocarbons, arsenic and mercury from wastewater produced in oil and gas fields. An oxidant, ferric ions, and flocculent are sequentially added to the wastewater to form a removable sludge containing the arsenic, hydrocarbon, and mercury contaminants. The Oxidation-Reduction Potential of the wastewater is controlled by oxidant addition to allow the required arsenic oxidation to occur while maintaining the mercury in elemental form. The process requires relatively short residence times between chemical additions and provides for large wastewater throughputs. The cleaned wastewater is suitable for discharge to the environment. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0039031-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7919665-B2 |
| priorityDate |
1997-04-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |