http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3790661-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_56d89ecad9f8611b616fba72b15d713b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-24 |
| filingDate | 1972-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1974-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dd8a2fec836eadbbc66ad100201ecdf2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_63b69d700ef616078baaeeba7957931f |
| publicationDate | 1974-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3790661-A |
| titleOfInvention | Process for the continuous dearsenification of polyphosphoric acid |
| abstract | POLYPHOSPHORIC ACID IS DEARSENICATED CONTINUOUSLY. TO THIS END, POLYPHOSPHORIC ACID CONTAMINATED WITH ARSENIC IS CONTINUOUSLY INTRODUCED OVERHEAD INTO A PACKED GASIFICATION ZONE AND HYDROGEN SULFIDE, TRAVELLING COUNTERCURRENTLY WITH RESPECT TO THE SAID POLYPHOSPHORIC ACID, IS INTRODUCED THEREINTO FROM BELOW AND CIRCULATED THEREIN. THE POLYPHOSPHORIC ACID IS ALOWED TO REMAIN IN THE GASIFICATION ZONE FOR A MEANS PERIOD BETWEEN 1 AND 5 HOURS SO AS TO EFFECT COMPLETE TRANSFORMATION OF THE ARSENIC INTO ARSENIC SULFIDE. FOLLOWING THIS, THE POLYPHOSPHORIC ACID IS DELIVERED TO A DEGASIFICATION ZONE COMMUNICATING WITH THE GASIFICATION ZONE AND COMPRESSED AIR IS INJECTED INTO THE DEGASIFICATION ZONE SO AS TO EXPEL HYDROGEN ULFIDE IN EXCESS FROM THE POLYPHOSPHORIC ACID, THE GASIFICATION AND DEGASIFICATION ZONES BEING MAINTAINED AT TEMPERATURES BETWEEN 80 AND 140*C. THE POLYPHOSPHORIC ACID SO TREATED IS TAKEN FROM THE AEGASIFICATION ZONE AND FILTERED IN CONVENTIONAL MANNER. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006073088-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4399114-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3991164-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4777028-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7470414-B2 |
| priorityDate | 1971-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.