| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S423-02 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D5-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G37-027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G37-14 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G37-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D5-16 |
| filingDate |
1989-04-24^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9bd3b860f3f36559635152cec1f42ae2 |
| publicationDate |
1989-11-08^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0340585-A2 |
| titleOfInvention |
Process for the preparation of sodium bichromate |
| abstract |
The present invention relates to a process for the preparation of Na dichromate by reacting Na chromate with acids, in addition to using sulfuric acid as acid additionally NaHS0₄, which is obtained as a waste product in the production of Cr0₃, and wherein the NaHSO₄ contaminated with Cr compounds with PO₄ ions in excess and the Cr (III) contained therein is precipitated as CrPO₄ at temperatures from 50 to 100 ° C and pH values from 3 to 6. |
| priorityDate |
1988-05-05^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |