http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107556178-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_77fdf7af4698ebf5974655524390a2c1 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C47-055 |
| filingDate | 2016-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53ba5d81e5ebe6a8a8eb228a94d29228 |
| publicationDate | 2018-01-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107556178-A |
| titleOfInvention | A kind of high-purity formaldehyde prepration process |
| abstract | The present invention relates to a kind of high-purity formaldehyde prepration process, including：Methanol is conveyed into methyl alcohol vaporizing device by methanol pump and is vaporized, air is sent into by blower fan simultaneously to be mixed, the 4 8% of the volume of methanol gas duty gas after mixing, after mixing by mixed gas delivery into preheater, preheating temperature is 170 DEG C, enter after being fully warmed-up in reactor, reactor temperature is 220 DEG C, catalyst is silver catalyst, the 9min of reaction time 6, the formaldehyde gas that reactor comes out is after the raw material preheating of methyl alcohol vaporizing device, temperature reduces by 110 130 DEG C, into absorption tower, process water with reverse flow in absorption tower exchanges heat, dilution, when concentration is up to 40 60%, formalin is extracted out from absorb the bottom of the tower, 10% is used as absorbing liquid to be recycled back to absorption tower, another part is defeated to Formaldehyde Tank by formaldehyde pump as product.The present invention makes full use of the heat in production, strictly controls parameters so that methanol conversion of the present invention reaches more than 98%, and purity is up to more than 60%. |
| priorityDate | 2016-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.