http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102442928-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2bae43d14afd9e6633e6da6ac661c80e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-16 |
| filingDate | 2012-01-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2e6ba2181c6fbfd6b160677e9e9245c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0648d8769bc0cc3d777f1a58796cc981 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b9ef5d3ddc4135f26297e2bf843830c3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a8718cf3a04660ffca6f7884ef9f3a0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0926c36002fdd5a554ee86577edc31f9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_035c95bb5cac395a65c553ea43232834 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_266ef0c1612ca7bc7f5445a0ffc0c4c6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f17bf23d92cf3d4ba613aaaaa1087878 |
| publicationDate | 2013-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102442928-B |
| titleOfInvention | Purification method for urea |
| abstract | The invention discloses a purification method for urea. The method comprises the following steps: (1) allowing urine to pass through a first-stage crystallizer, a second-stage crystallizer and a third-stage crystallizer, removing crystals in temperature sections of the first-stage crystallizer and the second-stage crystallizer and retaining crystals in a third-stage temperature section; (2) dissolving the crystals obtained in the third-stage temperature section in hot desalted water under the condition of continuous stirring; (3) controlling temperature and cooling and crystallizing a solution obtained in step (2) so as to obtain purified urea which can be used for production of vehicle urea. The method provided in the invention has the advantages of a simple and high efficiency process, convenient and feasible operation, safety, environmental protection and a good popularization and application value. |
| priorityDate | 2012-01-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.