http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103086871-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4ffc4b4c447a2b5924702b47855a8228 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_57a5f2387617a3b00251c5ab5babb518 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C55-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01G9-035 |
| filingDate | 2013-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_31d8a26e6d81f9a124f315c6d89dadb1 |
| publicationDate | 2014-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103086871-B |
| titleOfInvention | Preparation method of dicarboxylic acid with branch at alpha position for aluminum electrolytic capacitor electrolyte |
| abstract | The invention discloses a preparation method of dicarboxylic acid with a branch at an alpha position for aluminum electrolytic capacitor electrolyte. The method comprises the following steps of: adding an absolute ethyl alcohol solution of alkali into an anhydrous xylene solution of an ester shown as a general formula (1), dropping an anhydrous xylene solution of monohaloalkyl with carbon mumber being 1-12 for 4 hours at normal temperature, after heating refluxing for 8 hours, directly raising temperature to separate out xylene and ethanol, adding water for layering to obtain tetrabasic ester shown as a general formula (2), carrying out basification and acidification on the tetrabasic ester to obtain tetrabasic carboxylic acid shown as a general formula (3), dissolving the tetrabasic carboxylic acid in pyridine, and heating for refluxing to obtain the dicarboxylic acid with the branch at the alpha position, shown as a general formula (4). The preparation method disclosed by the invention has the advantages that the used deacidification method is low in temperature, easy to control, and the obtained product is high in purity and is more than 99%, does not influence high temperature performance of the electrolyte. The preparation method is applied to a high-voltage capacitor, extremely small in electrical characteristics deterioration and high temperature electrical conductivity, and pretty high in high temperature spark. |
| priorityDate | 2013-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 96.