http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102674429-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0faf833dd70df2d6c8317bbafa707c6f http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ed82aaf3bc50098c6ecbbaac68aa8ecc |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B82Y40-00 |
| filingDate | 2012-05-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6896c0f5c8e89cc1753ae437d637fa58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_139008bd1e1de9ebe534932b0f99680c |
| publicationDate | 2014-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102674429-B |
| titleOfInvention | High-whiteness sub-micron spherical barium sulfate and preparation method thereof |
| abstract | The invention relates to a high-whiteness sub-micron spherical barium sulfate and a preparation method thereof. The preparation method comprises the following steps: (1) after mixing barium carbonate and water, adding a barium-containing solvent to obtain a slurry 1; (2) adding an H2O2 solution into the slurry 1 to obtain a slurry 2; (3) slowly adding sulfuric acid into the slurry 2 until the pH value reaches 1-2, keeping the temperature of the slurry at 90-95 DEG C to carry out reaction, obtaining a slurry 3 after the reaction finishes, and carrying out solid-liquid separation on the slurry 3 to obtain a filter cake and a mother solution; and (4) adding water into the filter cake obtained in the step (3), stirring to disperse the filter cake, adding alkali to regulate the pH value to 7.0-8.0 to obtain a slurry 4, carrying out solid-liquid separation on the slurry 4 to obtain a filter cake and a mother solution, and evaporating and drying the filter cake to obtain the sub-micron spherical barium sulfate product. The whiteness of the barium sulfate is greater than 99.0%, and D50 is less than 0.5 micrometers. |
| priorityDate | 2012-05-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.