| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_114e4423ec77cbc8dab9d0a98909704e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C205-11
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C205-12 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-11 |
| filingDate |
2009-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2014-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad88ee9a1958271b3c4e9efe5886372d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d62481550d0166e2e805341acf6dac73
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45ceaea0a04a3881aff56219fe4c524d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cfe0af26f781f2cad69299536a8e7ad9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_432e01f15b3687b0df8d9e750724c29e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aeaee5b8e193e38f640e5c980dda112b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ed0c1ec7cc1c9468af2160cacd9be1dd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b4dbf8096789c031b9ffe3e12ba61050
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_361f4ae2e349d11c92c84d629676df6f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8265be6e996bccf857e38238b261e7e7 |
| publicationDate |
2014-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CN-102307844-B |
| titleOfInvention |
An improved process for the preparation of para-nitrobenzyl bromide |
| abstract |
An improved process for the preparation of p-nitrobenzyl bromide from p-nitrotoluene is disclosed wherein large excess of the reactant in carbon tetrachloride is treated with 2:1 bromide-bromate reagent and the product is isolated efficiently and with high purity through selective cold crystallization from reaction mass so as to allow the mother liquor to be recycled in a subsequent batch without any further work up. The cycles are continued so long as product of desired quality is obtained in adequate yield. Thereafter, the solvent and p-nitrotoluene are recovered from the mother liquor and the residue is treated with sodium borohydride to convert impurities back into reactant or product which is then recycled in the process thereby circumventing the problem of waste disposal and simultaneously yielding the desired product with >95 % yield with respect to p-nitrotoluene and >88 % bromine atom efficiency. |
| priorityDate |
2008-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |