http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111533159-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_23edfb9e9a5b542e72d522295f0bb1b5 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F17-247 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F17-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F17-247 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F17-10 |
| filingDate | 2020-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5c62b3c8d78e2f7ed67ec14ed0cef723 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f09bd6137dc1a68c6c8a21281591021d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_12f40d9af8d51b34bd2a7b240a6a0dfa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48fb1009a7cf5319c59708b22893b5d5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8eee0ff177cc63ce56968ebfa9d567e7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c9480b9b1a822aeafaa1ebc46eb82a56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09bb67ceaf7812916cbd812f0cd5f1ee http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_62564028e313c7bab3d7b463f6dd6de8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_60cc7988cd1d2f1eb7ffc8b0e1689c2d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1d972c1a881e111797118c703a59098d |
| publicationDate | 2020-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111533159-A |
| titleOfInvention | Preparation method of large-grain lanthanum carbonate |
| abstract | The invention belongs to the field of drug synthesis, and particularly relates to a preparation method of large-grain lanthanum carbonate. The method comprises the following steps: 1) adding concentrated hydrochloric acid into a suspension of lanthanum oxide and water to prepare a lanthanum chloride solution; 2) dissolving sodium bicarbonate with purified water to obtain sodium bicarbonate solution; 3) adding a certain amount of sodium bicarbonate solution into the lanthanum chloride solution to prepare lanthanum carbonate seed crystals, then cooling the lanthanum chloride seed crystals at a certain rate in a gradient manner, adding a certain amount of sodium bicarbonate solution into the system when the temperature is reduced to one temperature gradient, and carrying out heat preservation and crystal growth for a period of time to obtain an 8-water lanthanum carbonate wet product; 4) and dehydrating the wet product of lanthanum carbonate hydrate to prepare lanthanum carbonate containing 4-5 crystal water. The invention adopts a method of gradient cooling and sectional feeding to gradually induce crystallization so that crystal nuclei grow up slowly, and the obtained product has uniform particle size, large particles and good fluidity and can meet the requirements of preparations. |
| priorityDate | 2020-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 43.