http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-568529-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_95e3a9128cc2d7c36197fd3c0c3106dd http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2fa8f8941ecc2d9521285617dbb93322 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7d12b272953bbd9f0e1ed5db74d61e41 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-82 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-78 |
| filingDate | 1941-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1945-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-568529-A |
| titleOfInvention | Improvements in or relating to the separation of reaction mixtures containing aldehydes |
| abstract | Formaldehyde is recovered from its reaction products, particularly its reaction products with other aldehydes or ketones, by extracting the solution with a water-immiscible solvent having a low coefficient of solubility for formaldehyde compared with water and recovering from the extract the reaction products, the residue of the extraction being dilute aqueous formaldehyde. When the other reagent is a low aldehyde or ketone a preliminary distillation may be effected to remove some of the bodies other than formaldehyde. Suitable solvents are hydrocarbons, preferably aromatic, chlorinated hydrocarbons, and higher aliphatic and hydro-aromatic alcohols such as hexyl alcohols and cyclohexanol. In examples, a vapour mixture of acetaldehyde and 35 per cent formaldehyde is passed over an alkaline dehydrating catalyst at 280-290 DEG C. and the liquid reaction product is heated to distil off unreacted acetaldehyde and the residue is extracted with xylene, acrolein and crotonaldehyde being recovered from the extract. The aqueous solution resulting from the extraction contains the remaining formaldehyde. When the initial mixture is prepared from formaldehyde and higher aldehydes or ketones the preliminary distillation may be omitted. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2645665-A |
| priorityDate | 1941-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.