http://rdf.ncbi.nlm.nih.gov/pubchem/patent/PL-165627-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G37-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G37-14 |
| filingDate | 1991-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae99c7f7242b65a04eed53e696d847bb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_39582442196b2e540c22b5da1d0ddbc8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3d1e34849abee1f1057493c9cee287e4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d385d0a984b3ee0181d8d99d31929ecd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6b0f8101f9227e19f0062f42466332e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48b46cfec1af1675ccecbc789cf098f6 |
| publicationDate | 1995-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | PL-165627-B1 |
| titleOfInvention | Method for the production of sodium dichromate PL |
| abstract | The present invention relates to a process for the preparation of sodium dichromate solutions by alkaline oxidising digestion of chromium ores, bleaching of the furnace clinker obtained with water or a chromate-containing aqueous solution, adjustment of the pH to 7 to 9.5, removal of the insoluble components by filtration, as a result of which a sodium monochromate solution is obtained, conversion of the monochromate ions of this solution into dichromate ions by acidification, and crystallisation of sodium dichromate by concentrating this solution, characterised in that acidification is carried out using carbon dioxide under pressure with removal of sodium bicarbonate, the remaining solution is then substantially freed from sodium monochromate by cooling to a temperature below 10 DEG C and filtration, any monochromate ions which may still be present in the remaining solution are converted into dichromate ions by addition of an acid, and the sodium monochromate which has been filtered off is added to the sodium monochromate solution before conversion into a sodium dichromate solution using carbon dioxide. |
| priorityDate | 1990-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.