http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1392822-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_470b0dea11ea000f2e0675b964a256bc |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E30-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W30-50 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G21F9-125 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B60-026 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G21C19-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G21F9-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B60-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G21C19-46 |
| filingDate | 1972-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1392822-A |
| titleOfInvention | Extraction of metals from solutions |
| abstract | 1392822 Metal extraction from aqueous solutions COMITATO NAZIONALE PER L'ENERGIA NUCLEARE 29 Feb 1972 [2 March 1971] 9400/72 Heading C1A [Also in Divisions G6 and C2] Metal ions are extracted from an aqueous solution by treatment with a solution of a neoalkylhydroxamic acid of the formula wherein R<SP>1</SP>, R<SP>11</SP> and R<SP>111</SP> are alkyl radicals with at least one radical branched, the total number of C atoms in the acid being greater than 10, e.g. neotridecanehydroxamic acid, in waterimmiscible organic solvent. The metal ions may be selectively and completely extracted into the organic phase by adjusting the pH of the aqueous solution as follows:- (a) to pH=0 for Zr (IV), Nb (V), Fe (III), Pu (IV), Np (IV), Ti (IV), V (V), Hf (IV), Po (IV), Ta (V) ions, (b) to pH#4 for U (IV), Th (IV), Po (V), Bi (III) ions, (c) to pH#6 for rare-earth (III), Am (III), Ni (II), Pb (II), Y (III) ions, (d) to pH#9 for Ca, Sr, Ba, Ra (II) ions. The concentration of the neoalkylhydroxamic acid may be in the range 0À001-2M and the organic solvent may be xylene or a mixture of trimethyl benzenes. The aqueous solution may have an acid strength of 0À1-10M. Hydroxylamine, hydrazine or urea may be added to the aqueous solution to remove NO 2 <SP>1</SP> ions. The process may be applied to the purification of U (VI) solutions containing Pu, Np, Zr, Nb as impurities or the recovery of Pu, Np and fission products, e.g. Sr, Y, Cs, Ce, Pr, Ru, Rh from waste liquids. Uranyl nitrate solutions may be converted into more concentrated solutions of the sulphate, fluoride or acetate by extraction of the U into the organic phase and then contacting the organic phase with a mineral or organic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2522544-C2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2706212-C1 |
| priorityDate | 1971-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.