http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-861479-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_37f4922dfb7777b019e504b885211b8e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C30B13-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C30B13-02 |
| filingDate | 1958-02-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1961-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-861479-A |
| titleOfInvention | Zone refining process |
| abstract | A substance is purified from one or more impurities by forming a eutectic mixture with a second substance, subjecting the mixture to zone refining, and thereafter removing the second substance. Lead nitrate may be purified by forming a eutectic mixture with potassium nitrate. Sodium carbonate and sodium and potassium nitrate may be purified by <PICT:0861479/III/1> forming a eutectic mixture with water. An apparatus for the refining of a eutectic mixture which is liquid at ordinary temperature comprises a chamber 1 heated at an intermediate point by a resistance coil 5 and cooled at each side of the coil by cooling material 10, e.g. solid carbon dioxide or liquid air. A sealed tube 11 containing the eutectic mixture 12 to be refined is passed from one end of the chamber to the other by means of a rod 14 passing through the end 3 of the chamber. The tube 11 may be shaken to obtain a homogeneous liquid zone. A number of heating and cooling zones may be arranged alternately. An apparatus comprising 4 electric ovens in series and its use for the refining of lead nitrate are also described. |
| priorityDate | 1957-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.