http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003055228-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-685 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-76 |
| filingDate | 2002-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e5bdac514cc1f5446340ae753b94d207 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c17f193e0d1c108b39c1ceb52ecc383f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ecac8a5e2609f4ae4f7dd6bc4d9c5a3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48d91d4a7f709d5f340c2d8199362f9d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0b52364e1a30c7e4b08e63c5ec307ea http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c5c14e6eb14a8b998476312f05a8f03f |
| publicationDate | 2003-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2003055228-A1 |
| titleOfInvention | High-purity lanthanum isopropoxide and a process for producing the same |
| abstract | The invention provides true La(OiPr) 3 preferable as a starting material for an asymmetric synthesis catalyst and a process for producing the same. In this process, anhydrous lanthanum chloride LaCl 3 is reacted with potassium isopropoxide K(OiPr) in a mixed solvent of isopropanol and toluene, then the isopropanol is distilled away to replace all the solvent by toluene, then the reaction solution is left, decanted and filtered to give a transparent filtrate, and the solvent is distilled away from the filtrate which is then vacuum-dried under heating, whereby high-purity La(OiPr) 3 is obtained in 77% yield. In this high-purity La(OiPr) 3 , the La content is 97 to 103% of the theoretical content, impurity K is 0.3% or less, (Li+Na) is 0.01% or less, Cl is 0.2% or less, and the degree of association thereof is 5.5 to 6.5. |
| priorityDate | 2001-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.