http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1149870-A3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_df4e72183c5ee38a234212562dca6570 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-225 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-223 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-223 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-225 |
| filingDate | 1980-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1985-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_37a69e22b2cafd5b9a2edc73e1745d2d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79e50c86a1bfeb3e79a32ab1e5139514 |
| publicationDate | 1985-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1149870-A3 |
| titleOfInvention | Method of producing phosphoric acid |
| abstract | 1. A method of producing phosphoric acid, including the introduction of phosphate into at least two reaction zones, processing it in each zone of circulating phosphoric and sulfuric acids, circulating the reaction slurry from the first at least into the second reaction zone, crystallization of calcium sulfate dihydrate followed branch it; .- I Ifti:, from the product by filtration, washing the calcium sulfate dihydrate and the direction of the wash water for treatment, characterized in that, in order to enable the processing of poor phosphate raw materials while achieving high product yield and filtration performance, the last reaction zone is introduced 5-30% of the total amount. 2. A method according to claim 1, characterized in that the ne concentration of the phosphorus taxide in the last reaction zone is maintained 3-5% higher than in the first. 3. The method according to claim 1, characterized in that the concentration of sulphate ions in the reaction zones is maintained the same. 4. A method according to claim 1, characterized in that the concentration of sulphate ions in the first reaction zone is maintained higher than in the following four. 00 |
| priorityDate | 1979-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.