| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0edbc5af7e2e56a291814f047238339e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F7-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-186
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B7-193 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B7-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F7-54 |
| filingDate |
1980-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1981-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2207eea07a4dce2665e2b90f1511882f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5b2dbf083db4a4f2c019b47883b4de69 |
| publicationDate |
1981-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4308244-A |
| titleOfInvention |
Process for producing fluorine compounds and amorphous silica |
| abstract |
Hydrofluoric acid and/or other fluorine compounds are recovered by reacting fluosilicic acid with a sodium-containing compound to form an alkaline aqueous slurry comprising precipitated amorphous silica and dissolved sodium fluoride. The precipitated amorphous silica is separated from the alkaline aqueous slurry leaving an aqueous solution of sodium fluoride. The sodium fluoride solution can be used as such or reacted with other substances (such as alumina, to form synthetic cryolite). Sodium fluoride is recovered from the aqueous solution (as by evaporation or extraction) and used per se or reacted with sulfuric acid to produce hydrogen fluoride. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6217840-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5873980-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6193944-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108975468-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5028407-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009196858-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6248302-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4762698-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20020074281-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4465657-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4981664-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4952386-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6355221-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4915705-A |
| priorityDate |
1980-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |