http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2050710-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_09f47b46672b4fab928258e460ffd82e |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-129 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-125 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-0532 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G23-053 |
| filingDate | 1991-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e16b11a8364b925be67d13153c463e7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_21cb826182b7c1415788498cd98ffd32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86819abfcdba4ec48f85c5011406d3e7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50e9daf1dcd327dd6a5f543991a87e69 |
| publicationDate | 1992-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2050710-A1 |
| titleOfInvention | Preconcentration of sp spent acid with non-purified calcination waste gases in a venturi scrubber |
| abstract | ABSTRACT The invention relates to a process for the preconcentration of the waste acid obtained in the production of titanium dioxide by the sulphate process and to the use of a device for this process. It utilizes the heat of the hot unpurified calciner exhaust gases obtained in the calcining of titanium dioxide hydrate, waste acid being fed into an acid circuit, the recirculating acid being directly contacted in a venturi scrubber with the calciner exhaust gases, and part of the recirculating acid being withdrawn from the acid circuit.. in the form of preconcentrated acid. Part of the recirculating acid is rapidly mixed with the calciner exhaust gases at the upper end of the venturi scrubber, a second portion is applied, at the same level, via a weir, onto the interior wall of the venturi scrubber and, in the venturi neck, mixed with .the calciner exhaust gases. Below the venturi scrubber, the calciner exhaust gas is separated from the acid. The acid is preconcentrated from between 20 and 24% H2SO4 to between 25 and 28% H2SO4 and the calciner exhaust gas is cooled preferably from between 250 and 400°C to between 85 and 100°C. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10315149-B2 |
| priorityDate | 1990-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.