http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-441845-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28fd8a2f7ca983e63d38bcf83d182d44 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B1-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B11-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B1-34 |
| filingDate | 1934-06-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1936-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-441845-A |
| titleOfInvention | Anthraquinone dyestuffs and process for their manufacture |
| abstract | Water soluble diphenyl- or triphenyl-methane derivatives derived from anthraquinone dyes are prepared by treating sulphonated phenylaminoanthraquinones containing a free 4<1>-position in the phenyl nucleus with aldehydes in a neutral or acid medium, with the exception of bisulphites and of acids such as concentrated formic acid, which act as reducing agents; or anthraquinone derivatives of the general formula <FORM:0441845/IV/1> wherein A stands for a substituted or unsubstituted anthraquinone nucleus, R for hydrogen, alkyl or phenyl nucleus and X for hydrogen or a substituent other than a sulpho group, are subjected to a sulphonation operation. As media for the reaction water, sulphuric acid, hydrochloric acid, acetic acid may be used and instead of aldehydes there may be used compounds yielding the same under the reaction conditions; reaction is preferably effected at 30--100 DEG C. In examples: (1) 1-amino-2-sulpho-4-phenylaminoanthraquinone is treated with benzaldehyde in 70 per cent sulphuric acid on a water bath (dyes greenish-blue on wool): (2) 1 - amino - 2 - sulpho - 4 - phenylaminoanthraquinone is treated with paraformaldehyde in 60 per cent sulphuric acid (greenish blue): (3) 1 - amino - 2 - sulpho - 4 - (3<1> - chlorphenyl-)-aminoanthraquinone is treated with formaldehyde in acetic acid on a water bath (blue): reference is also made to 1-amino-2-sulpho-4-(2<1> - methoxy -) - or - (3<1> - methyl -) - phenylaminoanthraquinone as starting materials. A sample has been furnished under Sect. 2(5) of a dyestuff prepared by treating 1-phenylaminoanthraquinone with paraformaldehyde in 80 per cent sulphuric acid at 60 DEG C. and sulphonating. Specifications 22128/01, [Class 2], 244,462, 282,853, and 295,257, [all in Class 2 (iii)], are also referred to. |
| priorityDate | 1933-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.