http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19636191-B4
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/C01B17-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-88 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-88 |
| filingDate | 1996-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2008-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df1dc58f1de34786ed91d2bac014e0e0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fe1cbcf6c490d640e840d87191f68a72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb46883132b527427f0ed3634ea65721 |
| publicationDate | 2008-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-19636191-B4 |
| titleOfInvention | Process for the purification and concentration of used sulfuric acids |
| abstract | A process for purifying and concentrating contaminated sulfuric acids resulting from the nitration of aromatic hydrocarbons in the presence of sulfuric acids, wherein the steam-volatile impurities are completely removed from the sulfuric acid in a purification step and the thus purified sulfuric acid is concentrated a) the sulfuric acid at a temperature of 50 to 180 ° C in countercurrent with water vapor and with vapors from the first concentration stage of steam-volatile impurities at pressures between 200 and 1000 mbar is released, the water vapor in an amount of 10 to 30 wt .-% is added based on the amount of sulfuric acid, b) the sulfuric acid from a) is passed into a first Aufkonzentrierstufe in which it is concentrated under indirect heat at the same pressure as under a) by up to 5 wt .-% and then c) the sulfuric acid from b) is fed to a single or multi-stage vacuum concentration in which the pressure is lower than in b) and the ... |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2295375-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011032659-A1 |
| priorityDate | 1996-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.