http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5663462-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C205-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-08 |
| filingDate | 1996-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1997-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a46a26ca0272d8f51734e42bfce5095 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9513a94977513e2e818ee2fa6ebca027 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_94412b04eff7ba2f2beae31944ac27c3 |
| publicationDate | 1997-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5663462-A |
| titleOfInvention | Process for the production of dinitrotoluene and isomeric mixtures of dinitrotoluene |
| abstract | Dinitrotoluene and isomer mixtures of dinitrotoluene are produced in a single stage, continuous process by nitrating mononitrotoluene or an isomer mixture of mononitrotoluene in which the ortho-mononitrotoluene content is low with a nitrating acid made up of (1) from about 80 to about 100 wt. % inorganic constituents and (2) up to 20 wt. % organic constituents. The inorganic constituents of the nitrating acid include: (a) from about 60 to about 90 wt. % sulfuric acid, (b) from about 1 to about 20 wt. % nitric acid, and (c) at least 5 wt. % water. The organic constituents of the nitrating acid include: from about 70 to about 100% by weight nitrotoluene isomers and up to about 30% by weight nitration by-products. The nitration reaction is carrier out under adiabatic conditions. The molar ratio of nitric acid to mononitrotoluene during the nitration reaction is generally from about 0.7:1 to about 1.4:1. The phases generated during the nitration are subsequently separated and the acid phase is treated to remove at least 5 wt. % of the water present therein. The water may be removed by distillation or flash vaporization, optionally with simultaneous heat supply. After removal of the water, nitric acid having a concentration of from about 50 to about 100 wt. % is added to the treated acid phase in amount sufficient to satisfy the compositional limits for a nitrating acid useful in the process of the present invention. This reconcentrated acid phase is then returned to the nitration reaction. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9340486-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100369885-C |
| priorityDate | 1995-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.