| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5fb9798bf05293ffe6d2e0fde58c3cdb |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-51
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-42 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y30-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G49-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G49-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-06 |
| filingDate |
1991-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2d94cdf4fdf0a298ead7b8832ed848fc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ebebf2968c0a2b5330a18d031305af9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f32b81c134cc3189d90f7a47150b4072
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f28c3eddecbdff25b2d29b4e47319d2e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cacf3ab90963f3e498f90969cb3125a9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b269e6e8b9e09834ddecda2b2e8196aa |
| publicationDate |
1992-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0515748-A2 |
| titleOfInvention |
Process for producing acicular goethite particles and acicular magnetic iron oxide particles |
| abstract |
Acicular goethite particles are produced by a process which comprisesn (i) reacting an aqueous ferrous salt solution with less than one equivalent of an aqueous alkali hydroxide solution and/or an aqueous alkali carbonate solution based on Fe²⁺ in said aqueous ferrous salt solution; and (ii) blowing a molecular oxygen-containing gas into the ferrous salt reaction solution containing colloidal ferrous hydroxide or iron-containing colloidal precipitates thus obtained in the presence of ascorbic acid or a salt thereof so as to oxidize said colloidal ferrous hydroxide or iron-containing colloidal precipitates and to produce acicular goethite particles through green rust. Acicular magnetic iron oxide particles may be produced by reducing the acicular goethite particles obtained to produce acicular magnetite particles and, if necessary, the acicular magnetite particles obtained may be oxidized to produce acicular maghemite particles. Also, if necessary, the acicular magnetite or maghemite particles may be modified with Co or Co and Fe²⁺. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1085506-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2739714-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6136410-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5968226-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0717397-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5989516-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0717397-A3 |
| priorityDate |
1991-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |