http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-796645-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5acb3307e612280df6bced85d4c278e7 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25C3-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25C3-34 |
| filingDate | 1956-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1958-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-796645-A |
| titleOfInvention | Improved electrolytic process for obtaining rare earth elements |
| abstract | 796,645. Electrolytic production of rare earth elements. HORIZONS, Inc. July 6, 1956 [July 19, 1955], No. 21024/56. Class 41. A method of recovering at least one rare earth element from an oxygen containing compound of the group consisting of oxides and compounds which are readily decomposed to form oxides, which comprises: forming a molten pool of at least one of the alkali and alkaline earth metal chlorides, adding to said molten pool at least one of said oxygen containing rare earth element compounds, chlorinating the rare earth element compound added to the molten salt pool, passing an electrolysing current through the resulting anhydrous salt bath and recovering the rare earth element as a cathode deposit. Specified alkali and alkaline earth metal chlorides are those of sodium, potassium and calcium. Specified oxygen containing compounds of rare earth elements are nitrates, carbonates, basic carbonates, unignited oxides or salts of organic acids such as oxalates and acetates. Specified chlorinating agents are anhydrous hydrochloric acid, phosgene, and mixtures of chlorine with carbon monoxide or with carbon. The fused mass may be electrolysed directly in the vessel in which the chlorination reaction has been effected; or the reactor may be operated continuously by periodically adding rare earth compound to the fused bath, replenishing the alkali or alkaline earth metal chloride content thereof and withdrawing portions of the reaction composition which are then changed, in a molten condition, into an electrolytic cell constructed of inert material. Electrolysis is carried out by using a carbon or graphite anode. In an example, a molten salt bath was prepared by melting sodium and potassium chlorides in equal parts by weight. Anhydrous hydrogen chloride gas was passed into the bath through a graphite tube pierced with fine holes and cerium carbonate was concurrently added to the bath in increments. After completion of the reaction, the melt was electrolysed, cerium being deposited at the cathode. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103409769-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103409769-A |
| priorityDate | 1955-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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