http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110922417-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12P35-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12P13-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D501-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D501-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C227-40 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12P35-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12P13-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-12 |
| filingDate | 2019-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110922417-B |
| titleOfInvention | Method for recovering cefalexin crystallization mother liquor |
| abstract | The invention discloses a method for recovering cefalexin crystallization mother liquor, which comprises the steps of adding an alkaline regulator into cefalexin crystallization mother liquor under stirring at 15-40 ℃, keeping the pH value to be 7-8, adding lyase to carry out cefalexin cracking reaction, carrying out solid-liquid separation, adding an acidic regulator into clear liquid, regulating the pH value to be 6-7, cooling to 5-10 ℃, precipitating phenylglycine, carrying out solid-liquid separation, adding the acidic regulator into the clear liquid, regulating the pH value to be 3-4, heating to 20-40 ℃, and obtaining a 7-aminodeacetoxy cephalosporanic acid crystallization product. According to the invention, phenylglycine in the lysate is preferentially crystallized and separated through cooling crystallization, the purity is more than 99%, the yield is about 5%, the purity of the obtained 7-aminodesacetoxycephalosporanic acid is more than 99%, and the recovery rate is more than 90%. The invention does not introduce water and VOC substances, has no pollution to the environment, realizes clean recovery of the crystallization mother liquor and has high separation and recovery efficiency. |
| priorityDate | 2019-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 55.