http://rdf.ncbi.nlm.nih.gov/pubchem/patent/BR-PI0504385-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_86991ea1902bbca81ff4fb0ac58711c0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bba7d878008920ccc2a71a9b1020a112 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-1204 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-1213 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-1209 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-0475 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-047 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B03B7-00 |
| filingDate | 2005-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9057b66f41a3c97a60c455b342d98f28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ed7ac23fbe4f3bf6f1615720f2a7c7a5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb3a38194cab3d0d377b906f93e30d4f |
| publicationDate | 2017-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | BR-PI0504385-B1 |
| titleOfInvention | PROCESS OF ENRICHMENT OF MECHANICAL CONCENTRATES OF ANATASIO FOR THE OBTAINMENT OF SYNTHETIC RULE WITH LOW RARE LAND AND RADIOACTIVE ELEMENTS |
| abstract | enrichment process of anatase mechanical concentrates aiming to obtain synthetic rutile with low rare earth contents and radioactive elements. The present invention relates to an original process for the production of synthetic rutile from anatase mechanical concentrates. The resulting high-thio-2 ~ product is an intermediate raw material for the chloride process of titanium dioxide pigment production. The process is based on the application of the following sequence of unit operations in the processing of anatase mechanical concentrates: oxidizing atmosphere calcination, hydrogen reduction, carbon monoxide, gas resulting from the combustion of natural gas or any solid carbon based reducer - metallurgical coke, charcoal, petroleum coke, graphite, among others - both in fluidized bed reactor or rotary kiln, low intensity magnetic separation of reduced concentrate, high intensity magnetic separation of non-magnetic fraction from low intensity separation, hydrochloric acid leaching of the high intensity magnetic product, filtration and drying of the product of this leaching, high temperature oxidation of the drying product in the presence of a mixture containing: alkali metal sulphates (mainly lithium, sodium and potassium), carbonates of alkali metals (again, lithium, sodium and potassium mainly), phosphoric acid (h ~ 3 ~ po ~ 4 ~) and possibly sodium chloride, sudden cooling of the oxidized material, leaching with both hydrochloric acid and sulfuric acid from the oxidation product, drying of the product of the 2nd leaching and high intensity magnetic separation, obtaining as final product the non magnetic fraction of this separation. alternatively, the high intensity magnetic separation step can be performed immediately after the high temperature oxidation operation, rejecting the high magnetic fraction and directing the non magnetic fraction to the final leaching step, which results in the synthetic rutile of interest. Another alternative is to perform a density separation operation after low intensity magnetic separation, resulting in two materials: a light fraction, which is discarded, and a heavy fraction, which feeds further processing steps. The process object of this invention allows to obtain a high thio-2-low synthetic rutile deleterious element content for the chloride process to produce titanium pigments, in particular alkaline earth metals, rare earth elements, uranium and thorium. |
| priorityDate | 2005-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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