http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109796632-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L27-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K9-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K9-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K9-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-26 |
| filingDate | 2019-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109796632-B |
| titleOfInvention | Preparation method of high-whiteness precipitated calcium carbonate with core-shell structure |
| abstract | The invention discloses a preparation method of high-whiteness precipitated calcium carbonate with a core-shell structure, which comprises the steps of digesting, screening, impurity removal and aging low-grade low-whiteness quicklime, adding a crystal form control agent for carbonization reaction to form low-whiteness calcium carbonate particles as cores; digesting, screening, removing impurities and aging the high-whiteness quicklime, carrying out carbonization reaction, grafting the carbonized quicklime on the surface of a core to form a shell, and carrying out filter pressing, dehydration, drying, crushing and grading after the reaction is finished to obtain the core-shell structure high-whiteness precipitated calcium carbonate; the calcium carbonate prepared by the method can improve the whiteness of calcium carbonate products with the whiteness below 90 ℃ to more than 95 ℃, can perform color difference matching according to the requirements of different users on color difference, has concentrated particle size distribution and good dispersibility, is used for PVC sectional materials and pipes, and has the advantages of processing performance, whitening and toughening. The product has simple and feasible process, low cost, low price and better economic benefit. |
| priorityDate | 2019-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.