http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-568884-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b8be6a6c990669567cc455d32b00535e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-143 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-146 |
| filingDate | 2000-06-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b616fec66fa886c93bd8156b6071ae9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d28e0bb3e93798c05183fc2bff0bc411 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba3faea0ea696fd67f2ca3146ac6f326 |
| publicationDate | 2004-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-568884-B |
| titleOfInvention | Silica-based sols and silica-based particles, their production and use |
| abstract | The invention relates to a process for the production of an aqueous sol containing silica-based particles which comprises (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol; (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight; (c) allowing particle growth of the alkalised sol for at least 10 minutes; or heat-treating the alkalised sol at a temperature of at least 30 DEG C; (d) alkalising the obtained sol to a pH of at least 10.0; and (e) optionally concentrating the sol obtained according to (b), (c) or (d) to provide an aqueous sol containing silica-based particles and having a specific surface area of at least 90 m<2>/g aqueous sol; as well as an aqueous sol containing silica-based particles obtainable by the process. The invention also relates to an aqueous sol containing silica-based particles which sol has a specific surface area of at least 115 m<2>/g aqueous sol and an S-value within the range of from 10 to 45% or contains silica-based particles having a specific surface area of at least 550 and less than 1000 m<2>/g SiO2. The invention further relates to the use of the aqueous sol containing silica-based particles as a drainage and retention aid in the production of paper as well as a process for the production of paper from an aqueous suspension containing cellulosic fibres, and optional filler, in which silica-based particles and at least one charged organic polymer are added to the cellulosic suspension. |
| priorityDate | 1999-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 59.