http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-262119-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/C09B1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D239-72 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D239-72 |
| filingDate | 1926-11-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1927-11-03^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-262119-A |
| titleOfInvention | Improvements in the manufacture and production of 1-diazo-anthraquinone-2-carboxylicacids |
| abstract | 262,119. I. G. Farbenindustrie Akt.- Ges. Nov. 28, 1925, [Convention date]. 1-Diazoanthraquinone-2-carboxylic acids are obtained by treating the nitrogenous anthraquinone derivatives obtainable according to the process described in Specification 147,001 with nitrous acid, or compounds liberating nitrous acid, in the presence of water. According to examples (1) anthraquinone-1:2-isoxazole or its 5-nitro derivative is treated with nitrosyl eulphuric acid and water added; anthraquinone- 1 : 2-isoxazole is treated with oxides of nitrogen in concentrated hydrochloric acid or is suspended in sodium nitrite solution and hydrochloric acid added. Solutions of the diazonium sulphates or chlorides are thus obtained. Anthraquinone-2-carboxylic acid derivatives can be obtained from the above diazonium compounds. The 1-chlor-5-nitroanthraquinone-2- carboxylic acid can be obtained by treating the 1-diazo-5-nitroanthraquinone-2-carboxylic acid with hydrochloric acid and cuprous chloride; it is purified by forming the magnesium salt, liberating the acid again, and recrystallizing. Azo dyes.-The above 1-diazoanthraquinone-2- carboxylic acids can be used for the production of azo dyes. |
| priorityDate | 1925-11-28^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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