http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110482586-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H19-385 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F11-181 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F11-183 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H19-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-18 |
| filingDate | 2019-08-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110482586-B |
| titleOfInvention | Preparation method of light calcium carbonate for carbonless copy paper |
| abstract | The invention discloses a preparation method of light calcium carbonate for carbonless copy paper, which comprises the steps of calcining 300 limestone to obtain quicklime, and carrying out digestion reaction on the quicklime and water to generate lime milk; sieving with 100 mesh sieve to obtain 10-100g/L refined lime milk; heating the refined lime milk to 40-90 ℃, introducing mixed gas containing carbon dioxide, adding electrolyte to adjust the zeta potential to 90-100mv, reacting until the zeta potential of the system is reduced to 80mv, adding a spatial resistance agent to adjust the zeta potential to be not less than 80mv, and stopping the reaction when the carbonation reaction is carried out to reach the pH value of 7-8 to obtain calcium carbonate slurry; the steric hindrance agent comprises more than two of sodium polyacrylate, microcrystalline cellulose and long-chain organic acid; and then dehydrating, drying and crushing to obtain the light calcium carbonate for the carbonless copy paper. The light calcium carbonate prepared by the method has narrow particle size distribution, small average particle size and good dispersion property, and is applied to carbonless copy paper, so that the coated paper has excellent color rendering property and surface strength. |
| priorityDate | 2019-08-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 43.