http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101830494-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4d32b4e3568d0ea6968d02316a7cff0b |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-18 |
| filingDate | 2010-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_578f3abc9c01dca6eb5811be7063320f |
| publicationDate | 2013-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-101830494-B |
| titleOfInvention | Method for preparing active calcium carbonate by taking gypsum as raw material |
| abstract | The invention provides a method for preparing active calcium carbonate by taking gypsum as raw material, comprising the following concrete steps of: regulating the weight ratio of calcium sulfate dihydrate solid in gypsum to liquid water to be 100:0.3-40 by adding water or evaporating water; adding a calcium carbonate activating agent until the weight ratio of the calcium sulfate dihydrate solid to the calcium carbonate activating agent is 100:1.0-2.5; adding ammonium bicarbonate until the weight ratio of the calcium sulfate dihydrate solid to the ammonium bicarbonate is 100:92-106; evenly mixing; milling for 5-12 hours at the room temperature; washing sediments with water and then drying to obtain an active calcium carbonate product the grain diameter of which is 0.2-5mu m. The method adopts phosphorous gypsum, desulfurized gypsum and citric acid gypsum of industrial by-products as raw materials and has the obvious characteristics of comprehensive resources utilization and low production cost. |
| priorityDate | 2010-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.