http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-328743-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_376ea804c39188241d723842246bb8f7 |
| filingDate | 1966-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1967-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-328743-A1 |
| titleOfInvention | A METHOD TO PRODUCE ISATOIC ANHYDROUS. |
| abstract | A method for producing isatoic anhydride comprising mixing phthalimide and a substantially equimolar proportion of sodium hydroxide with an amount of water, at a temperature no greater than about 30ยบ C, at least sufficient to dissolve the sodium phthalimide that is formed, add, per mole of phthalimide, and not more than X minutes after mixing the phthalimide, sodium hydroxide and water, from 0.9 mole to 1.08 mole of sodium hypochlorite to the resulting solution, where X is a function of the temperature of the mixture of phthalimide, sodium hydroxide and water, and is represented by curve C of Figure 1 of the accompanying drawings, and adjust the solution to a pH and keep it therein, sufficiently low to substantially convert all of the sodium salt of isatoic anhydride to in isatoic anhydride, but high enough to maintain the monosodium salt and the disodium salt of N-chlorophthalamic acid in it when substantially all the phthalimide of the The reaction mixture has reacted at least to salts of N-chlorophthalamic acid, but before more than about 20% of it has reacted to the sodium salt of isatoic anhydride. (Machine-translation by Google Translate, not legally binding) |
| priorityDate | 1966-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.