http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109628765-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-225 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-007 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B1-02 |
| filingDate | 2018-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109628765-B |
| titleOfInvention | A kind of recovery method of VPO catalyst |
| abstract | The present invention provides a method for recovering a VPO catalyst, comprising the following steps: step 1, mixing vanadyl pyrophosphate and sodium carbonate, calcining at high temperature, and cooling to room temperature; step 2, putting the product obtained in step 1 into hot water, filtering Obtain the filtrate, freeze and crystallize the filtrate to obtain trisodium phosphate crystals, and filter to obtain trisodium phosphate crystals and crystallization mother liquor; Step 3, add a precipitating agent to the crystallization mother liquor, and the precipitating agent is aluminum sulfate, magnesium sulfate, ammonium sulfate and magnesium chloride. one or more; adding a flocculant to the crystallization mother liquor to aid in filtration, and adjusting the pH of the filtrate to 7-10 with acid; filtering and removing impurities to obtain a sodium metavanadate solution; step 4, adding ammonium salt to the sodium metavanadate solution, Precipitation of vanadium yields ammonium metavanadate. The recovery method of the VPO catalyst of the invention can realize the effective separation of vanadium and phosphorus, maximize the recovery rate of vanadium, and reduce the loss of vanadium. |
| priorityDate | 2018-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.