http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-491525-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B5-36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B5-36 |
| filingDate | 1937-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-491525-A |
| titleOfInvention | Process for the manufacture of vat dyestuffs |
| abstract | Vat dyes are made by ringclosing 4-amino-1 - anilidoanthraquinone - 31 - halogen - 21-carboxylic acids or the esters or chlorides thereof or the corresponding 3-sulphonic acids, the 4-amino group being arolyated prior to or after the ring closure. Ring-closure is effected by splitting off water from the acids, treating the acid chlorides with aluminium chloride or vatting the esters. The aroylation is preferably carried out in a solvent such as nitrobenzene, and aroylating agents specified are the chlorides of benzoic acid, halogen or alkoxy benzoic acids, naphthoic acids and diphenyl carboxylic acids. The products dye vegetable fibres blue shades fast to chlorine and boiling. In examples: (1) 1-amino-4-benzoylaminoanthraquinone is condensed with 2-bromo-6-chlorobenzoic acid methyl ester in naphthalene in presence of copper and potassium acetates, and the 4-benzoylamino-1-anilidoanthraquinone - 31 - chloro - 21 - carboxylic acid methylester so obtained is vatted with sodium hydrosulphite to give the acridone; (2) 2-amino-6-chlorobenzoic acid is condensed with 1-bromo-4-aminoanthraquinone - 3 - sulphonic acid, the 4 - amino - 3-sulpho - 1 - anilidoanthraquinone - 31 - chloro-21 - carboxylic acid so obtained is ring-closed with sulphuric acid, splitting off the sulphonic group, and the acridone so obtained is aroylated with 4,6-dichlorbenzoyl chloride or any other carboxylic acid chloride; (3) 4-amino-3-sulpho-1 - anilidoanthraquinone - 31 - chloro - 21-carboxylic acid is vatted with sodium hydrosulphite, splitting off the sulphonic acid group, and ring-closed with chlorsulphonic acid, the product being then acylated as in example 2. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1027346-B |
| priorityDate | 1936-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.