http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109734062-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-096 |
| filingDate | 2018-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109734062-B |
| titleOfInvention | A kind of preparation method of difluorosulfonimide acid |
| abstract | The invention discloses a preparation method of difluorosulfonimide acid, which comprises the following steps: adding ammonium bifluoride into a reaction kettle, heating up to a molten state under nitrogen protection, adding sulfuric ester dropwise, and controlling the reaction temperature at 120℃～ Between 160 ° C, the reaction time is 8 to 12 hours, and the by-product alcohol should be continuously distilled out during the reaction process until no extraction; the obtained reaction solution is filtered and transferred to a rectifying still for rectification under reduced pressure, and fractions are collected. The temperature is 90-120°C, and the vacuum degree is 14-20 mmHg, thereby obtaining electronic grade difluorosulfonimide acid. The advantages of the invention are that the difluorosulfonimide acid is prepared by reacting sulfuric ester and ammonium bifluoride, which reduces the cost of raw materials, reduces the consumption of materials and the generation of wastes, improves the utilization rate of raw materials, the yield and the purity of products, and makes the products more stable. The purification is easier, the preparation process is more concise and efficient, and a good technical foundation is laid for the large-scale industrial preparation of difluorosulfonimide acid. |
| priorityDate | 2018-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.