| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_efbc93fa15ca59046e84ca5c5c84c433 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F28D2021-0022 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-90
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F28F19-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-148
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01B1-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F28G9-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-263 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F25B47-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F28G9-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F28F19-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-90
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-88 |
| filingDate |
2020-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f2a72f032e3271a4674af451b7ac4a3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_72c1fa3eb552d6ffd30219f5a6eb457c |
| publicationDate |
2021-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2021122773-A1 |
| titleOfInvention |
Method of cleaning an apparatus used in the concentration of a mineral acid |
| abstract |
The present invention relates to a method of preparing an apparatus (or a plant comprising multiple apparatuses), for example a heat exchanger, an evaporator or a distillation column, for use in a process (especially one operated continuously) for concentration of a mineral acid by evaporating water, wherein the apparatus or plant comprises (at least) one device resistant to the mineral acid and the device is rinsed with an aqueous alkali metal hydroxide solution of a concentration by mass of alkali metal hydroxide in the range from 1% to 30% at a temperature in the range from 40°C to 90°C for a period of 2 hours to 7 days. |
| priorityDate |
2019-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |