http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2280901-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d4ada69388e0a1b68daaf536597c732 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-51 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-159 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C1-3081 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y30-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C1-309 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-159 |
| filingDate | 1998-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2007-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bca5c6cba735b26e954c9d5b580d9980 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b4873d111402865ca6b85ad82609f73b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a33be593eac597efa3d290e516c6d0b2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ef886d31afca91541c648e07968fdc0 |
| publicationDate | 2007-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2280901-C |
| titleOfInvention | Process for making hydrophobic silica with reduced surface area under neutral conditions |
| abstract | The present invention is hydrophobic silica gels having a reduced surface ar ea and a method for their preparation under natural conditions. The method comprises two steps, where in the first step the pH o f a mixture comprising a silica hydrosol and colloidal silica is adjusted with a base to within a range of pH 3 to pH 6 to facilitate formation of a silica hydrogel having incorporated therein colloidal silica. In the second step the silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel to form a hydrophobic silica gel having a surface area within a range of about 100 m2/g to 450 m2/g in the dry state. In a preferred process the hydrophobic silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobi c silica organogel. A water soluble compound of cerium or iron may be added during conduct of the second step to improve heat stabilit y of the hydrophobic silica gel. |
| priorityDate | 1997-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 89.