http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0963345-A1
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/C01P2004-60 |
classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C1-3081 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-16 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-159 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-30 |
filingDate | 1998-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b121c82b6d357d486444a0c165c5483c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ef886d31afca91541c648e07968fdc0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a33be593eac597efa3d290e516c6d0b2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bca5c6cba735b26e954c9d5b580d9980 |
publicationDate | 1999-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber | EP-0963345-A1 |
titleOfInvention | Hydrophobic silica gels with reduced surface area |
abstract | The present invention is hydrophobic silica gels having reduced surface area and a method for their preparation. The method comprises three steps, where in the first step a mixture comprising a silica hydrosol and colloidal silica is formed. In the second step the mixture is heat treated in the presence of a strong mineral acid at a pH less than about 1 to form a silica hydrogel having incorporated therein colloidal silica. In the third 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 thereby forming a hydrophobic silica gel having a surface area within a range of about 100 m2/g to 450 m2/g as measured in the dry state. In a preferred method the hydrophobic silica gel is contacted with a sufficient quantity of an organic solvent immiscible with water to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel. |
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: 110.