http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2549897-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D323-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D323-06 |
| filingDate | 2004-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_def5ef6c104983ac91c3eace64fcd72f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3623de8656173e5ea6ec697c50293f86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d16ab5513a26459ee7d4d7a8c0e83e2a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_215370edebcf6ff42ad1654c40f8580d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4bec07324c36b4240129085fecd7d264 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_130bc0173973f91fcb9cca16476a7b2c |
| publicationDate | 2005-07-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2549897-A1 |
| titleOfInvention | Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification |
| abstract | The invention relates to a method for separating trioxane from an inlet flow (I) consisting of formaldehyde, trioxane and water.Said method consists in a) preparing an inlet flow (I), which contains formaldehyde as the main component and trioxane and water as auxiliary components, b) mixing the inlet flow (I) with a return flow (VII) containing trioxane as the main component and formaldehyde and water as auxiliary components. An inlet flow (Ia), which contains formaldehyde as the main component and trioxane and water as the auxiliary components, is obtained. Said method also consists in c) distilling the inlet flow (Ia) in a first distillation step at a pressure of between 0.1 2.5 bars, thus enabling a flow (II), which contains formaldehyde as the main component and water as the auxiliary component, and a flow (III), which contains trioxane as the main component and water and formaldehyde as the auxiliary components, to be obtained, d) distilling the flow (III), optionally after separating materials at a low-boiling point from the flow (III) in a low-boiling separation step and in a second distillation step at a pressure of between 0.2 17.5 bars, whereby the pressure in the second distillation step is 0.1 - 15 bars higher than the pressure in the first distillation step. A flow (IV) is obtained which is essentially made of trioxane, and also a flow V which contains trioxane as the main component and water and formaldehyde as the auxiliary components, e) optionally mixing the flow (V) with a flow (IX), which contains water as the main component, in order to obtain a flow (Va) having a higher water content than flow (V), whereby flow (Va) contains trioxane as the main component and water and formaldehyde as the auxiliary components, f) distilling the flow (V) and/or flow (Va) in a third in distillation step at a pressure of between 1 - 10 bars, whereby a flow (VI), which is essentially made of water, and the return flow (VII), which contains trioxane as the main component and water and formaldehyde as the auxiliary components, are obtained. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8530678-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8450507-B2 |
| priorityDate | 2003-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.