http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-634941-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3dc973a7d82f4493c19369f74cbf844d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c7bb1a38f06a33d694c8fb4fb956812 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_df0f616facbc68d67a8215167f6d51a4 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C1-022 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C1-02 |
| filingDate | 1947-08-08^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1950-03-29^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-634941-A |
| titleOfInvention | Improvements in or relating to the purification of minerals |
| abstract | The iron content of minerals such as silica sands, quartzite, quartz, gravel, sandstone, fluorspar, felspar and alumina is reduced by treatment of the mineral with a solution of titanous chloride or sulphate, and oxalic acid, each substance being present in 1/10 -5 per cent solution. Detergents or wetting agents, and other acids or salts, e.g. 0.3 per cent sulphuric or 1 per cent hydrochloric acid by volume, or sodium chloride or sulphate may also be present. Temperatures from atmospheric to below 100 DEG C. may be employed. Air should be excluded during the treatment, suitably by the use of nitrogen or other inert gas. After removal of the treatment solution, e.g. by centrifuging, the sand &c. is water-washed in a counterflow, washed, and centrifugally dewatered. Prior to the treatment, the sand &c. should be well washed and should preferably have heavy minerals removed by the use of mining separation tables. Titanium may be recovered in the titanous state from the treatment solution by reduction with zinc mercury amalgam, or with cadmium present as fine particles, or by an electrolytic method. It is stated that less satisfactory results are obtained when the oxalic acid is replaced by one or more of the following, viz.: formic, tartaric, hydrochloric, sulphuric, acetic acids, sodium acid oxalate, ferrous sulphate, hydrazine sulphate. |
| priorityDate | 1947-08-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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