http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2235683-C2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-14 |
| filingDate | 2000-04-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_51b7565b6d77f2b18cfc38049e6145f1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7fd9f47d787e4917c1df786eb2961e9a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a10e21a62ef45d013f19a6688cab9ce |
| publicationDate | 2004-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2235683-C2 |
| titleOfInvention | Silica-based sols |
| abstract | FIELD: paper-and-pulp industry. n SUBSTANCE: invention relates to aqueous sol containing silica-based particles and to papermaking process. Aqueous sol has S value within a range of 10 to 45%, viscosity 5 to 40 cPs, and SiO 2 /M 2 O molar ratio from 10:1 to 40:1, where M represents alkali metal or ammonium, and silica content is at least 10 wt %. Silica-based particles are prepared as follows: aqueous solution of a silicate is acidified to pH 1-4 resulting if formation of sol containing 4.5-8 wt % silica, which sol is subjected to first-step alkalization to pH at least 7 leading to growth of alkaline sol particles for at least 10 min. Sol is the thermally treated and subjected to second-step alkalization to pH al 10.0. Manufacture of paper from aqueous slurry containing cellulose fibers and optionally filler comprises adding silica-based particles and at least one charged organic polymer. n EFFECT: improved drainage and retention properties and increased stability of sol. n 20 cl, 3 tbl, 7 ex |
| priorityDate | 1999-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.