| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_026917a1661e94c21035d1c5d1fa135e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H21-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-187
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21H17-68 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H21-52 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-187
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21H17-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-18 |
| filingDate |
2001-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_979436fe9338dbe8145f3459b48ba5e7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_367e1a926d042255a364dba429517026
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb4d4ec3ed4d8008a8ca50903a42c765
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_62b19d749ac8fa5e4e3f63c8df494f0c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_684b64930582b85586ccb953e9abadfc |
| publicationDate |
2001-08-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2001018038-A1 |
| titleOfInvention |
Process for producing silica particles suitable for use as filler for paper |
| abstract |
The present invention relates to a process for easily and efficiently producing silica particles having a narrow particle size distribution and a high porosity from inexpensive starting materials such as sodium silicate. The silica particles of the present invention can be obtained in the form of a slurry containing them by (1) forming a slurry by mixing first particles difficultly soluble in an alkali and soluble in an acid, with an aqueous alkali silicate solution to form a first slurry containing the first particles, (2) neutralizing the first slurry with a mineral acid to prepare a second slurry containing second particles wherein silica is deposited on the first particles, and (3) adding a mineral acid to the second slurry to dissolve the first particles from the second particles, to prepare a third slurry containing silica particles. n When the silica particles of the present invention are used as a filler even in a small amount for paper making, the resultant papers have excellent brightness, opacity, opacity-after-printing, etc. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011212511-A1 |
| priorityDate |
1998-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |