http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111675787-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-588 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-588 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F216-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F222-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F226-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 |
| filingDate | 2020-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111675787-B |
| titleOfInvention | Preparation method of post-hydrolyzed ultra-high molecular weight comb-shaped polyacrylamide |
| abstract | The invention discloses a preparation method of post-hydrolyzed ultra-high molecular weight comb polyacrylamide, which comprises the following steps: s1: dissolving 20-25% of acrylamide in 70-77.5% of distilled water by mass percent, adding 2.5-5% of a functional side group mixed monomer consisting of N-triethyl- (4-vinyl benzyl) ammonium chloride, sodium styrene sulfonate, N-methyl maleimide and 4-hydroxybutyl vinyl polyoxyethylene ether, and performing ultrasonic dispersion to obtain a mixed solution; s2: cooling the mixed solution to 0-5 ℃, adding a complexing agent, stirring for 0.5-1 h, introducing nitrogen to drive out oxygen, adding a chain transfer agent, adding an initiator to initiate polymerization reaction under the condition of continuously introducing nitrogen, and sealing for reaction for 3-8 h; s3: post-hydrolysis; s4: oven drying, pulverizing, and sieving. The polyacrylamide prepared by the method is in a rigid comb-shaped structure, and the molecular side chains repel each other, so that the high-temperature resistance, salt resistance and shear resistance of the polyacrylamide are effectively improved, and the polyacrylamide can be used as an ideal oil displacement agent for high-salt high-temperature stratums of oil fields. |
| priorityDate | 2020-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.