| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_53b4d53983adbf56dd0e7d0bf96f8ce5 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5272
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-308
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-66
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-683 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5245
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-66
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F9-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F9-00 |
| filingDate |
2022-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e1d971172e3628a652cb7497310f5d7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d29ffcf6cf87d0f107364f0671887f31
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b3ef2cab22fd53b42ca534b94633c391
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b019b33186370021b49ef01b61cfffe |
| publicationDate |
2022-09-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2022289610-A1 |
| titleOfInvention |
Method for chromium removal from post-tanning wastewater |
| abstract |
A method for chromium removal from post-tanning wastewater includes the following steps: (a) mixing pretreated post-tanning wastewater with an induction reagent to allow an induction reaction; and (b) adjusting a pH of a mixture obtained after the induction reaction to higher than 7.0 for precipitation; where the induction reagent includes a soluble metal salt. In the treatment method of the present disclosure, pretreated post-tanning wastewater is mixed with an induction reagent, a small amount of neutral chromium complexes remaining in the wastewater are converted into cationic chromium complexes under the action of the induction reagent (that is, a charge property of the chromium complex is changed), and then a pH is adjusted for precipitation to remove chromium, which greatly improves the removal efficiency of chromium in wastewater. |
| priorityDate |
2021-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |