http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20070022029-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-143 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01F23-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-146 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-146 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-143 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01F3-12 |
| filingDate | 2005-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2007-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20070022029-A |
| titleOfInvention | Silica-based sol and its preparation and use |
| abstract | The present invention relates to a process for preparing an aqueous silica-based sol comprising: (a) providing a cationic ion exchange resin having at least a portion of ion exchange capacity in hydrogen form; (b) contacting the ion exchange resin with an aqueous alkali metal silicate to form an aqueous slurry; (c) stirring the aqueous slurry until the pH of the aqueous phase is in the range from 5.0 to 11.5; And / or alternatively, stirring the aqueous slurry to enable particle agglomeration or microgel formation corresponding to an S value of 45% or less, thereby obtaining an aqueous phase pH of 5.0 or greater; (d) adjusting the pH of the aqueous phase to at least 9.0 using at least one material comprising at least one aluminum compound; And (e) separating the ion exchange resin from the aqueous phase after step (c) or step (d). The present invention also provides S values in the range of 15 to 25%, Si: Al molar ratio in the range 20: 1 to 50: 1, Si: X molar ratio in the range 5: 1 to 17: 1, wherein X = alkali metal, 5% by weight. A silica-based sol containing silica-based particles having a SiO 2 content of at least and having a specific surface area of at least 300 m 2 / g. The invention also relates to a papermaking method comprising: (i) providing an aqueous suspension comprising cellulose fibers; (j) adding to said suspension at least one drainage and retention agent comprising a silica-based sol according to the invention; And (k) dehydrating the suspension obtained to provide a paper sheet or paper web. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100816084-B1 |
| priorityDate | 2004-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.