| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b8be6a6c990669567cc455d32b00535e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-455
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-375
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-29 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-143
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-141
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-146
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-1435
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-142 |
| 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/C01B33-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-143
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
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-29
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-10 |
| filingDate |
2000-04-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba3faea0ea696fd67f2ca3146ac6f326
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b616fec66fa886c93bd8156b6071ae9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d28e0bb3e93798c05183fc2bff0bc411 |
| publicationDate |
2008-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CZ-299846-B6 |
| titleOfInvention |
Sols containing silica-based particles and a process for their production and use |
| abstract |
The aqueous sol containing silica-based particles has an S-value in the range of 10 to 45% and a viscosity in the range of 5 to 40 cP, and a molar ratio of SiO 2 to 2%. wherein M is an alkali metal or ammonium ion, in the range of 10: 1 to 40: 1, or has a silicon oxide content of at least 10% by weight. The method for producing silica-based particles comprises the steps of: (a) acidifying an aqueous solution of silicate to a pH of 1 to 4 to form an acidic sol, (b) alkalizing the acidic solution containing SiO 2. in the range of 4.5 to 8% by weight, (c) allowing the solution to be alkalized for at least 10 minutes for aging to grow the particles, and (d) basifying the sol obtained to a pH of at least 10.0. Silica-based particles are obtainable by this method. Their use is as a dewatering agent and means for increasing the retention of paper production. In the process for producing paper from an aqueous suspension containing cellulosic fibers, silica-based particles and at least one organic polymer are added to the suspension. |
| priorityDate |
1999-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |