| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5fbf39a86486fafc6b3fc5a710c549b3 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-385
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G11-006
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-3842
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G11-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B17-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-238
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-38 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-238
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G11-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-46 |
| filingDate |
1991-04-25^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0a2195e9871add196675c4ce4e8939b5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1522e1bbf66ba872bac64e23c63a6cf8 |
| publicationDate |
1992-04-29^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0482160-A1 |
| titleOfInvention |
Method for removing cadmium for phosphoric acid |
| abstract |
Method for removing cadmium from phosphoric acid by the use of the permeation process through a liquid membrane. The method is comprised of: a) formulating an emulsion of the aqueous-in-organic type wherein the dispersed aqueous phase is the re-extraction phase and the organic phase contains an extraction agent of formula (I) wherein R₁ and R₂ are aliphatic, arylic or aromatic radicals and n can be simultaneously 1 or 0; b) dispersing said emulsion in a phosphoric acid solution; c) removing the aqueous phase which contains the cadmium-free phosphoric acid; and d) breaking the cadmium-laden emulsion to recycle the extraction agent. The obtained phosphoric acid may have a cadmium content of 1.5 ppm and may be used in the production of fertilizers. A preferred emulsion contains bis (2,4,4-trimethylpentyl) monothiophosphinic acid as agent for the selective extraction of cadmium. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0617135-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10865110-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3691992-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2019106324-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2714392-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019071108-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0659893-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019071108-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9701649-A1 |
| priorityDate |
1990-04-27^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |