http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-19990021572-A
Outgoing Links
| Predicate | Object |
|---|---|
| filingDate | 1997-08-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1999-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-19990021572-A |
| titleOfInvention | Method and apparatus for purifying ultra high purity formaldehyde |
| abstract | The present invention relates to a method for obtaining pure formaldehyde from formalin containing a lot of water and methanol. First, a formalin solution containing a lot of water and methanol is vaporized in the middle or bottom of the extraction tower depending on the content of water and methanol. Supply it. The polyalkylene oxide compound, which is inert to formaldehyde and has high affinity with water and methanol, is reloaded into the top, middle or bottom of the extraction column depending on the water content in the polyalkylene oxide. In addition, an absorption tower (purifier) is added to the manufacturing process of formaldehyde gas to obtain ultra-high purity formaldehyde using a polyalkylene oxide compound, and if necessary, ultra-high-purity form by purifying formaldehyde gas having a moisture of 8000 ppm or less. It is about how to get aldehydes. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109679040-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109679040-A |
| priorityDate | 1997-08-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.