http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-427251-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d8df8d26b76caec4a0e6cc0d0962af96 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C221-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C205-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C205-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C227-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C229-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-61 |
| filingDate | 1933-08-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1935-04-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-427251-A |
| titleOfInvention | Manufacture of intermediates for dyes |
| abstract | 2 - Aroyl - 4 - chloro - 5 - nitrobenzoic acids are manufactured by condensing 4-chloro-5-nitrophthalic anhydride with an aromatic hydrocarbon or halogenated hydrocarbon of the benzene or naphthalene series capable of undergoing a Friedel-Craft condensation. In examples, 4-chloro-5-nitrophthalic anhydride is condensed in the presence of aluminium chloride with benzene, chlorobenzene and o-dichlorobenzene. 2 - Aroyl - 4 - chloro - 5 - aminobenzoic acids are manufactured p by reducing the foregoing products with ferrous hydroxide and ammonia. They may be converted by ring closure into anthraquinone derivatives. In an example, the product from 4 - chloro - 5 - nitrophthalic anhydride and benzene is reduced. The product on heating with sulphuric acid yields 2-amino-3-chloroanthraquinone. 4 - Chloro - 5 - nitrophthalic anhydride is manufactured by mononitrating the acid sodium salt of 4-chlorophthalic acid, separating the 4 - chloro - 5 - nitrophthalic acid from the isomeric 3 nitro compound by means of the sodium salts and converting it into the anhydride by heating. According to the Provisional Specification, 4 chlorophthalic anhydride is nitrated, and the isomeric acids are separated by means of their barium salts and converted into their anhydrides by heating with acetyl chloride. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2428025-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4284797-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7408076-B2 |
| priorityDate | 1933-08-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.