| 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/C01P2004-51
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-12 |
| classificationCPCInventive |
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/C09C1-309
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-159
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/C09C1-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-159 |
| filingDate |
1998-02-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1999-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6501e877c303fc1653324384e09cd26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b4873d111402865ca6b85ad82609f73b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b406f2d5a3e2116fe5b8301255a6092e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c945056fd98075dd7b019049afe87a92 |
| publicationDate |
1999-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5942590-A |
| 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 area and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of 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 m 2 /g to 450 m 2 /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 hydrophobic silica organogel. A water soluble compound of cerium or iron may be added during conduct of the second step to improve heat stability of the hydrophobic silica gel. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2110414-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8455165-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6579929-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9388314-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8202502-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10407571-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6051672-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009127438-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006258780-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006241222-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6596250-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011039983-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005233937-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8435474-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6852299-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8361946-B2 |
| priorityDate |
1997-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |