http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2333379-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_574bc8fd24e08fc5a292d012c5a28e48 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B7-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B7-0743 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C265-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B32-80 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25B1-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B32-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B7-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B7-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-08 |
| filingDate | 2007-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2010-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df1fc35b2c9568b664935449b94f5410 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_14fb9b108b68ce8aea36e0aebb19667a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3701b6bfc2393213067f6bb6aebcdad |
| publicationDate | 2010-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2333379-T3 |
| titleOfInvention | PROCEDURE FOR THE COUPLED PRODUCTION OF CHLORINE AND ISOCIANATES. |
| abstract | Process for the coupled preparation of isocyanates and chlorine comprising the following steps a) nitration of aromatic compounds selected from the group of toluene, halogenated toluene, benzene and halogenated benzene giving the aromatic compounds nitrated once or twice correspondingly using nitric acid, taking nitration is carried out based on the compound to be nitrated in the presence of a sulfuric acid with a concentration of 65.0 to 98.0% by mass parts of sulfuric acid referred to the mass parts of sulfuric acid and water as catalyst, the sulfuric acid being diluted after completion of the nitration and has a concentration that according to the amount of sulfuric acid used and the number of nitration stages is less than 0.5 to 25 percentage points than that of the sulfuric acid used. b) transformation of the diluted sulfuric acid obtained from step a) in a sulfuric acid concentration facility, c1) reaction of the nitrated aromatic compound once or twice obtained in step a) with hydrogen to give the corresponding amine, or c2) to if the aromatic compound nitrated once or twice is nitrobenzene, reaction of the nitrobenzene obtained from step a) with hydrogen giving aniline and then reaction of this product with formaldehyde giving di- and polyamines of the diphenylmethane series, d) reaction of the amines that are obtained from step c1) or c2) with phosgene giving the corresponding isocyanates, e) recycling of the hydrogen chloride dissolved in water or in the form of gas that is generated in the reaction of the amines of step c1) or c2) with phosgene from stage d) to stage f); f) preparation of chlorine gas; g) separation of the reaction water or moisture contained in other sources with drying of the chlorine gas obtained in step f) by treatment of the chlorine gas obtained in step f) with a sulfuric acid with a concentration of 90.0 to 99, 0% by mass parts of sulfuric acid referred to the mass parts of sulfuric acid and water until the sulfuric acid has a concentration of 65.0 to 90.0% by mass parts of sulfuric acid referred to the mass parts of sulfuric acid and water, h) reaction of dry chlorine gas, obtained from stage g) with carbon monoxide for the preparation of phosgene, i) use of the phosgene obtained from stage h) in stage d), j) transformation of the diluted sulfuric acid obtained in stage g) either in the same sulfuric acid concentration facility of stage b) or directly in one or several stages of nitration according to stage a) and then transformation of the additional diluted sulfuric acids Mind, obtained from this or these nitration (s) in the same sulfuric acid concentration facility according to stage b), where the dilute sulfuric acid streams from stage b) and g) are combined in the acid concentration facility sulfuric acid and is increased by one or several stages of vacuum distillation to a higher concentration or by extraction of partial streams after the different distillation stages to various higher concentrations, as are necessary respectively for one or more process steps of the nitration of compounds aromatics according to stage a) or drying of chlorine gas according to stage g) k) and then recycling of the concentrated sulfuric acid obtained in stage j) either for complete or partial use in stage g) and / or stage a). |
| priorityDate | 2006-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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