http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4348334-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e9445e5e3626f36e932c6451a928250 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C301-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-40 |
| filingDate | 1980-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1982-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8dc8d1548b3329b21f2a92e1ce102d2c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_894d6e27c0f8d89e1bec81aa28419591 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c66a3b8439349964b331e6856582fa4d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_462da7d1f428131e8b7afed9f5095c91 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5b6101ba52104db013b01f2d1fa3bae6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e40008b4b732aa9496cacf8b2ba9a85a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2d91cb22e848ee91383c3297501716f7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b549aafa99d8e9b51caa169841c71858 |
| publicationDate | 1982-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4348334-A |
| titleOfInvention | Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid) |
| abstract | A process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid by sulfonating naphthalene, nitrating the sulfonation product, and separating the pure magnesium salt of 3-nitronaphthalene-1,5-disulfonic acid, which process comprises: n (a) sulfonating naphthalene with liquid SO 3 in the presence of an inert organic solvent at temperatures between -40° and +20° C.; n (b) adding to the reaction mixture obtained a mixture consisting of about equal parts of 100% sulfuric acid and fully reacted crude nitration mixture from nitration of a previous nitration charge, separating from the resulting two-phase system the upper organic solvent phase by decanting, and removing from the Armstrong's acid anhydride acid slurry the remainder of organic solvent by distillation, or removing it during or after subsequent nitration, subsequently adding to the residue the amount of nitric acid required for nitration, and then nitrating; n (c) adding then firstly water and afterwards, in the absence of the inert organic solvent, at 90° to 120° C., a compound releasing magnesium ions, the amount being such that, per mol of 3-nitronaphthalene-1,5-disulfonic acid, 1.1 to 1.3 mols of magnesium ions are added, and a sulfuric acid concentration of between 40 and 60 percent by weight (relative to the sulfuric acid and water) is maintained; and n (d) separating the crystallized magnesium salt of 3-nitronaphthalene-1,5-disulfonic acid at a temperature of between 20° and 70° C., and subsequently optionally washing it with a maximum of 60 percent by weight of sulfuric acid and/or water, and optionally drying the product. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109704998-A |
| priorityDate | 1979-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 106.