http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113072439-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_15223e7ce784de472fc4e70b7ab93c7e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C46-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C46-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C50-34 |
| filingDate | 2021-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_187fc937562b14d79f50bcad316c3695 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e11d8dbf9e3b25d7aed4997b6f3fd9c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_393f66926adbba004a3645b946415073 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2fc9fe172f12f9e2a88890de566dcd0 |
| publicationDate | 2021-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113072439-A |
| titleOfInvention | A cleaning process for synthesizing 1,4-dihydroxyanthraquinone |
| abstract | The invention relates to the technical field of dye intermediates, in particular to a cleaning process for synthesizing 1,4-dihydroxyanthraquinone, comprising the following steps: sequentially adding metered proportions of 98% sulfuric acid, boric anhydride, phthalic anhydride and Hydroquinone, stir evenly and then heat up to 100~180°C, and keep the reaction for 2~24h; after the insulation reaction is over, cool down the material and transfer it to another reaction vessel for hydrolysis; after the hydrolysis is completed, cool down, filter and wash with water to obtain 1 , 4-dihydroxyanthraquinone. The cleaning process for synthesizing 1,4-dihydroxyanthraquinone provided by the invention can reduce the consumption of raw material phthalic anhydride, greatly reduce the difficulty of wastewater treatment, and also reduce the production cost; rate has also improved. |
| priorityDate | 2021-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.