| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-375
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-29
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-455 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-142
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-141
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-1435
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-143
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-146 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-37
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-45 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-29
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-14
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/D21H17-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-146
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-141 |
| filingDate |
2001-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8c16e9c0078974543e642b09bde0e1fd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_51b7565b6d77f2b18cfc38049e6145f1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8c8ff543a403cf27c0730d12b278be5f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d35b98e521ae6ac13137e79b72ce394b |
| publicationDate |
2002-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2002147240-A1 |
| titleOfInvention |
Silica-based sols |
| abstract |
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) alkalizing the acid sol at an SiO 2 content within the range of from 4.5 to 8% by weight; (c) allowing particle growth of the alkalized sol for at least 10 minutes; or heat-treating the alkalized sol at a temperature of a least 30° C.; (d) alkalizing 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 SiO 2 . 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 fibers, and optional filler, in which silica-based particles and at least one charged organic polymer are added to the cellulosic suspension. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10384156-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006263694-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7674833-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010037801-A1 |
| priorityDate |
1999-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |