http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2341450-C1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3b1e085666b7fc67b2d461ebfbdbfc5d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b71b35ea8e0d1884df7013d046bc14a6 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-46 |
| filingDate | 2007-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2008-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7f9f400910a8d18d0f5fff145a7a8950 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_95fc2b076feadc52b84096b5e3fcbcd7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9f462b6232bac53156ac0752be1d20d5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7eaf3434e4e1b6d16c08c39a4d28056 |
| publicationDate | 2008-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2341450-C1 |
| titleOfInvention | Method of purifying wet-process phosphoric acid |
| abstract | FIELD: chemistry. n SUBSTANCE: method has been developed for phosphoric acid, which contains practically no magnesium ions (for example, acid obtained from kola apatite). Purification method for wet-process phosphoric acid, which includes its extraction by tributyl phosphate in a mixer-settler unit, washing the obtained extract, water re-extraction obtaining re-extract and returning part of it to the washing stage. The washing process is carried out in four steps with the correlation of the organic and water phases Vo:Vw, equals (12-18):1, and re-extraction is carried out with water in two stages, where water in the first stage is supplied in an amount which ensures the correlation Vo:Vw, equals (13-17):1, and the obtained re-extract is returned for washing, and the second stage - water is supplied in an amount which ensures the correlation Vo:Vw, equals (4-6):1. In the re-extract obtained after the first stage of re-extraction, supplied for washing, ammonia is added till the mole ratio is NH 3 :H 3 PO 4 =0.2-0.5. n EFFECT: creation of a purification method of phosphoric acid, not containing significant quantities of magnesium ions, obtaining phosphoric acid suitable for production of food grade salts. n 3 cl, 2 tbl, 3 ex |
| priorityDate | 2007-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.