http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107721838-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5cd145c1947a5e193e1ae3b285402051 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C46-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C46-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C50-34 |
| filingDate | 2017-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_be093614d1a491f0daea2f02a2df8dd5 |
| publicationDate | 2018-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107721838-A |
| titleOfInvention | A kind of extracting method for rheum emodin |
| abstract | The present invention relates to a kind of extracting method for rheum emodin, adopts water as solvent and substitutes conventional organic solvent, by A, take the rhizome of dry giant knotweed to be broken into powder, be added to the water and boil, extracts 25 65min, filter and collect filtrate；B, the filter residue after filtering is extracted 27 times according to step A with water, and obtained filtrate is mixed repeatedly, is concentrated；C, 80% ethanol precipitation of 1.4 3.7 times of amounts is added into concentrate, 7 24h is placed and stays overnight, remove impurity, recovery ethanol is evaporated under reduced pressure and obtains mother liquor；D, chloroform is added in mother liquor, is shaken, is placed to chloroform layer and crocus Precipitation occur, filter out precipitation, such as above-mentioned method chloroform recovery 23 times, merge precipitation, with acetone recrystallization 25 times, obtain crocus acicular crystal extraction rheum emodin, cost is relatively low, and technique is simple, environmentally friendly and nontoxic. |
| priorityDate | 2017-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.