http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102849703-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_53b4d53983adbf56dd0e7d0bf96f8ce5 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P40-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B09B3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B7-24 |
| filingDate | 2012-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_809964c72ffdae58ed6dec0dc57fd3cf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_edf7cf67c649222a74cbf3eb84542b61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e8bcad6a1073746af3082973020f868f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_69570c3df2d353e57b126c495314ae86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_237d723f97eeb8550aed2d3aee147769 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0f160cd8ffa88c827648fb83558fd266 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_88f6c8a0582c88c15587599a54c7f7df |
| publicationDate | 2014-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102849703-B |
| titleOfInvention | Method for preparing fine calcium phosphate by using phosphogypsum desulfurization residue |
| abstract | The present invention discloses a method for preparing fine calcium phosphate by using phosphogypsum desulfurization residue. The method is characterized in that phosphogypsum desulfurization residue is added with deionized water to prepare lime milk; the resulting refined lime milk is adopted to carry out pre-neutralization and purification on wet-process phosphoric acid, wherein a reaction is performed for 0.5-6.0 hours at a temperature of 45-85 DEG C, and the wet-process phosphoric acid pre-neutralization pH value is 1.0-3.0; the pre-neutralized slurry is filtered, wherein the filter cake is used for production of fertilizer phosphate products; the resulting filtrate is subjected to neutralization by using the lime milk; filtration is performed; the resulting filter cake is dried to obtain the fine calcium phosphate, wherein the end point pH value is 5.5-9.5, and the pH value is controlled to obtain different fine calcium phosphate; after neutralization, the mother liquor returns to emulsification to prepare the lime milk so as to achieve recycle. |
| priorityDate | 2012-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.