http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109021154-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F120-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F120-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-32 |
| filingDate | 2018-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-11-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109021154-B |
| titleOfInvention | Method for preparing instant anion high-molecular-weight polyacrylamide by two-step method |
| abstract | The invention discloses a method for preparing instant anion high molecular weight polyacrylamide by a two-step method, which comprises the following steps: (1) adding the dispersing agent into a reaction kettle containing a hydrocarbon solvent, and heating to dissolve the dispersing agent; (2) adding 20-40 mass% of acrylamide aqueous solution, water-soluble initiator and hydrolytic agent into a reaction kettle, and stirring to form a water-in-oil reaction system; (3) introducing nitrogen to remove oxygen in the reaction system; (4) heating the reaction system to react for a period of time to form polyacrylamide primary particles; subjecting the primary particles to hydrolysis; (5) dropwise adding an alcohol-water mixed solution into the reaction kettle, and stirring to ensure that polyacrylamide primary particles are aggregated to form solid particles with a structure similar to a grape bunch; (6) and removing the alcohol and the aqueous solution by azeotropy to obtain the instant polyacrylamide solid with high molecular weight. The polyacrylamide obtained by the two-step method has a higher dissolution speed when in use and is not easy to agglomerate. |
| priorityDate | 2018-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.