http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1058614-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cc8b77ff86a2dfdbca33e7de285d81bf |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F7-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B23-0446 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J19-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F7-08 |
| filingDate | 1964-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1967-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1058614-A |
| titleOfInvention | Process for treating liquid extracted from soda-roasted laterite |
| abstract | A process for treatment of the liquor obtained after soda-roasting of laterite or other iron ore containing Ni, Cr and Al includes a first stage wherein aluminium hydroxide is precipitated by adjusting to pH 4-10 by addition of ammonium hydrogen sulphate, a second stage wherein, after concentration of the filtrate from the first stage, sodium bicarbonate is precipitated by adding ammonia to pH 10-10.5 and treating with CO2 under pressure, and a third stage wherein the filtrate is concentrated to separate sodium sulphate and ammonium sulphate, then treated with ammonium hydrogen sulphate, sulphuric acid and sulphur dioxide to obtain ammonium chrome alum. The sodium bicarbonate from stage 2 is roasted at 100-300 DEG C. yielding carbon dioxide which is recycled to the carbonation stage, and sodium carbonate which returns to the soda-roasting stage. Ammonium hydrogen sulphate for stages 1 and 3 is obtained by at least partly decomposing, by roasting at 300-500 DEG C., ammonium sulphate, which may be that yielded in subsequent stages. Ammonia for stage 2 is also a product of the roasting. Subsequent electrolysis of the ammonium chrome alum to chromium yields sulphuric acid, which is recycled to stage 3, and ammonium sulphate. |
| priorityDate | 1963-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.