http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19811602-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e9445e5e3626f36e932c6451a928250 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C15-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C5-333 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C15-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F12-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-3435 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C5-333 |
| filingDate | 1998-03-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7193875d2a0af379aa76cbbd31bea6aa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ce650c249e99c80145d661a6e468257 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c60ab233aad3e9adbf5aad27fc780a21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2fa37fbc4631bd4bf4b92260502aee83 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fe3e1c77068f6c0ae784a4c50810c928 |
| publicationDate | 1998-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-19811602-A1 |
| titleOfInvention | Polymerization inhibitor process |
| abstract | A process for the prevention of premature polymerisation of styrene monomer during its production by the dehydrogenation of ethylbenzene into styrene. The process comprises: (a) passing a supply current of ethylbenzene over a dehydrogenation catalyst in a reactor, to form a current of styrene; (b) removing an exhaust effluent containing by-products consisting of H2, ethylbenzene vapour, styrene vapour, benzene, toluene, CO, CO2 and water vapour from the reactor; (c) injecting a styrene polymerisation inhibitor; and (d) compressing the exhaust effluent for the ultimate treatment stages, the gases containing no more than a trace of polystyrene. Also claimed is the system and sub-systems for the production of styrene monomer. Preferably the polymerisation inhibitor is a radical chain terminator type, of the class of sterically hindered amines. It is chosen from the following derivatives of 1-oxyl-2,2,6,6,-tetramethylpiperidine-4-yl :- -the acetate, 2-ethylhexanoate, stearate, benzoate and 4-tert-butylbenzoate; and from the bis(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl derivatives: succinate, adipate, sebacate, n-butylmalonate, phthalate, isophthalate, terephthalate and hexahydroterephthalate; and also -N, N<1>-bis(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl)-adipamide, N-(1-oxyl-2,2,6,6-tetramethyl-piperidine-4-yl)caprolactam, N-(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl)dodecylsuccinimide, 2,4,6-trisN-butyl-N-(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl)-s-tria zine, and 4,4<1>-ethylenebis(1-oxyl-2,2,6,6-tetramethylpiperazine-3-one). The more preferred inhibitor is the sebacate of bis(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0036052-A1 |
| priorityDate | 1997-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 112.