http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0692642-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5fb9798bf05293ffe6d2e0fde58c3cdb |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-11 |
| filingDate | 1991-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b5898386bb3099ee4caf6b0aa7507e1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d72e39234be943b7245c2d760a8ad600 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_512428a7abafd879547b24188d1314fd |
| publicationDate | 1994-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H0692642-A |
| titleOfInvention | Manufacturing method of spherical magnetite particles |
| abstract | (57) [Summary] [Object] To provide a method for industrially obtaining a magnetite particle powder having a high Fe 2+ content and a spherical surface with a smooth surface. [Structure] Aqueous ferrous salt solution and Fe in the aqueous ferrous salt solution A first stage reaction in which an oxygen-containing gas is passed through an aqueous ferrous salt reaction solution containing a ferrous hydroxide colloid obtained by reacting 0.80 to 0.99 equivalents of alkali hydroxide with respect to 2+ , In a method for producing spherical magnetite particles by a two-step reaction with a second-step reaction in which 1.00 equivalent or more of alkali hydroxide is added to the residual Fe 2+ after completion of the first-step reaction and the mixture is heated and oxidized. The second-step reaction is started during the period from when the pH value of the reaction liquid starts to drop near the end of the first-step reaction until it reaches pH 5. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011213548-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009167032-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5885740-A |
| priorityDate | 1991-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.