http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102173988-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8b3d9dd5b8ec591aa20977ff5695341a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C65-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate | 2011-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dd841243dda5cb89f9bdaaed76dba988 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3d09a4957d75349f89283f306e42e6d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2fe6fed956168537fcf7a1cd2181ccbd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4b01a36fd03c00d2da3ed6e1f105e03e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d62387fa6a77663b51b96629fc8a0376 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eb6a51103e269793522e6196d1d03c74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50bb9b8088b33c9d3ed92eb4a186d1b1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3dbcae2ff9f91ce3ee41f3a8018c3cd8 |
| publicationDate | 2013-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102173988-B |
| titleOfInvention | Purification method of 6-hydroxyl-2-naphthoic acid |
| abstract | The invention relates to a purification method of a fine chemical product and discloses a purification method of 6-hydroxyl-2-naphthoic acid. The method comprises the following steps: pouring 6-hydroxyl-2-naphthoic acid carboxylation feed solution in a neutralization kettle, adding water to stir evenly, keeping the temperature to 35 DEG C, adding 30% sulphuric acid solution, adjusting the pH value to 6.0-8.0, stirring and cooling to 25-30 DEG C, centrifuging to dewater and remove partial 2-naphthol; adsorbing with XDA series resin to remove 2-naphthol and polymer; pouring the obtained feed solution in an acid precipitation kettle, adding sulphuric acid solution, adjusting the pH value to 3.5-4.5 to precipitate 6-hydroxyl-2-naphthoic acid; centrifuging to dewater and obtain a 6-hydroxyl-2-naphthoic acid coarse product; and pouring the coarse product in a decoloring kettle, adding 6-8 times of refining medium while adding a defined amount of activated carbon, heating to dissolve the coarse product, refluxing and stirring for 60 minutes, filtering, cooling to crystallize, and centrifuging to dewater and obtain a 6-hydroxyl-2-naphthoic acid refined product. The method has low production cost and high product quality. |
| priorityDate | 2011-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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