| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d4ada69388e0a1b68daaf536597c732 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-90
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-2995
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-12 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-159
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y30-00
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/C09C1-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-159
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-16 |
| filingDate |
1998-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b4873d111402865ca6b85ad82609f73b
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-0963342-A1 |
| titleOfInvention |
Neutral-aged hydrophobic silica gels with reduced surface area |
| abstract |
The present invention is neutral-aged hydrophobic silica gels having a 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 contacted with a strong mineral acid at a pH less than about 1 to form a silica hydrogel having incorporated therein colloidal silica. In the second step the silica hydrogel is aged at a pH within a range of about pH 3.5 to pH 8. 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 to form a hydrophobic silica hydrogel having a surface area within a range of about 100 m2/g to 450 m2/g in the dry state. In a preferred method the hydrophobic silica hydrogel is further contacted with a sufficient quantity of a water-immiscible organic solvent 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 |