http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1162198-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bd5fc0c1317b030f0dacdb7c9d7e85d3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6ec79cdce3936e0c476898b3e8962cbd |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D257-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D257-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 2001-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_686d420f5705b85e055166270d896da5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b944018cb3152459e59c39f6abb4f7a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_88b0c7976be1952b64e5b769773414ae http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c019f94beaec731e229ccaff5aa993b3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_464ca38a6dbe30e1fa66f1225d8485cb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1d399befc005d6b6805380c952519c3d |
| publicationDate | 2001-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1162198-A1 |
| titleOfInvention | Process for the preparation of highly pure 5,5'-bi-1H tetrazolediammonium salts |
| abstract | A process for the preparation of a highly pure 5,5'-bi-1H-tetrazolediammoniumnsalt (BHT·2NH 3 ) in a high yieldnby efficiently synthesizing the 5,5'-bi-1H-tetrazolediammoniumnsalt (BHT·2NH 3 ) from cheap and easy-to-handlenstarting materials based on a one-pot reaction,nand removing copper components which are impurities in thenform of a copper·ammonia·5,5'-bi-1H-tetrazole complex fromnthe reaction solution or from the coarse crystals isolatednfrom the reaction solution. By further conducting thentreatment with a chelating resin, the copper content cannbe further decreased. n The refining process is conducted by either:n (A) adding small amounts of aqueous hydrogen peroxide andnammonia water to the reaction solution containing then5,5'-bi-1H-tetrazoledisodium salt that is obtained bynsynthesizing a dicyan by adding, as an oxidizing agent, anaqueous hydrogen peroxide to an aqueous solution of thenstarting materials of which the pH has been adjusted to ben5 to 7 by the addition of a small amount of acidicnsubstance in the presence of hydrogen cyanide or sodiumncyanide, sodium azide and a catalytic amount of a coppernsalt, followed by the heat-cyclization reaction, andnremoving by filtration the insoluble component of thenprecipitated copper·ammonia·5,5'-bi-1H-tetrazole complex,nand reacting the reaction solution with an aqueousnsolution of ammonium chloride, or (B) adding the aqueous solution of ammonium chloride tonthe reaction solution, transforming the separated 5,5'-bi-1H-tetrazolediammoniumnsalt (BHT·2NH 3 ) into a 5,5'-bi-1H-tetrazoledisodiumnsalt (BHT·2Na), dissolving the disodiumnsalt again, and reacting the aqueous solution of thenobtained 5,5'-bi-1H-tetrazoledisodium salt from which theninsoluble component of the formed copper·ammonia·5,5'-bi-1H-tetrazole ncomplex has been removed by filtration withnthe aqueous solution of ammonium chloride. The process ofnpreparing the highly pure 5,5'-bi-1H-tetrazolediammoniumnsalt (BHT·2NH 3 ) combines the refining process (A) or (B)nwith a step of treatment with a chelating resin to reactnthe treated solution with ammonium chloride or an aqueousnsolution thereof to recover the formed highly purenammonium salt in the form of crystals. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006078275-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006078275-A2 |
| priorityDate | 2000-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 91.