http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3312388-C2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F11-464 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-501 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-77 |
| filingDate | 1983-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1986-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1986-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-3312388-C2 |
| titleOfInvention | Process for the production of calcium sulfate dihydrate |
| abstract | The invention relates to a method for gypsum extraction during exhaust gas desulphurization using the wet-lime-gypsum process, with gypsum being generated secondarily and with the exhaust gas containing SO ↓ 2 being brought into contact in an absorption column with a suspension containing calcium carbonate and / or calcium hydroxide and then an oxidation of the calcium sulfite generated in the absorption column is carried out with an oxygen gas in an oxidation column. In order to create a process which avoids the disadvantages mentioned in the description and which enables the oxidation reaction of calcium sulfite under high pH conditions, ie in a neutral or alkaline atmosphere, which was previously not considered feasible, it is proposed that the suspension in the oxidation column is adjusted to a temperature of 60 ° C or more and a pH of 6.5 or more to oxidize the calcium sulfite, that the resulting gypsum crystals, which are contained in the suspension drawn off from the oxidation column, are collected and that the Suspension is returned to the absorption column without the gypsum. |
| priorityDate | 1982-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.