http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9813117-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1334a6f74d010311a68e03948141c835 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_16f2229cc5647bdfa8d67231340044fb |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-322 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-146 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C15-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C15-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-32 |
| filingDate | 1997-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0fdf3bfe698e4f83b748aad62da0ed72 |
| publicationDate | 1998-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9813117-A1 |
| titleOfInvention | Distillation of vinylaromatic monomer |
| abstract | Highly pure vinyl aromatic monomers, notably styrene, are recovered from a liquid mixture by distillation. One major aspect of the invention is reduction in residence times in the distillation towers and the use of pressures in the range of about 5 to about 9 psia when retrofitting existing plants which employ waste heat steam in processes for the separation and recovery of vinylaromatic monomers. In another embodiment, a startup process comprises (i) introducing a feed comprising vinylaromatic monomer, polymerization inhibitor, aromatic hydrocarbon components having boiling points above that of the vinylaromatic monomer to a packed distillation column, said column having a maximum theoretical ΔP above which flooding of said column may occur, the average residence time of liquid, inhibitor-depleted vinylaromatic monomer distillate overhead inside said column being less than 60 seconds, (ii) periodically or continuously measuring the difference between the pressure at the top of the column and the pressure at the bottom of the column to thereby ascertain the actual ΔP within the column, and (iii) controlling the pressure within the column so that the actual ΔP within said column is substantially constant and does not exceed said maximum theoretical ΔP. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2683454-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103706136-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CZ-299901-B6 |
| priorityDate | 1996-09-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.