http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021237379-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_60a87e56a61038af3cc4a50849fd0afa |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-34 |
| filingDate | 2020-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7bec18f069d79961a058966072996578 |
| publicationDate | 2021-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2021237379-A1 |
| titleOfInvention | Method for preparing cationic polyacrylamide flocculant |
| abstract | Disclosed is a method for preparing a cationic polyacrylamide flocculant. The method has the following steps: adding a DAC aqueous solution with a mass fraction of 80%, AM and distilled water to a four-neck flask equipped with a stirrer and a thermometer, uniformly mixing same, introducing nitrogen to evacuate air from the system, heating same in a water bath to 54-58°C, adding a tert-butyl hydrogen peroxide initiator and sodium pyrosulfite, continuing to introduce nitrogen for 2-4 h, carrying out a polymerization reaction under closed conditions for 8-10 h, then removing a colloid, soaking same with acetone for 25-27 h, then soaking same with absolute ethanol for 25-27 h, drying a white solid in a vacuum drying oven at 50-60°C for 5-7 h, and drying and crushing same to obtain the flocculant. The method is simple, convenient, quick and easy to operate, and the prepared cationic polyacrylamide flocculant has a high removal rate in terms of wastewater turbidity and can be prepared on a large scale. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114751499-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114751499-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114805688-A |
| priorityDate | 2020-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.