http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1255071-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-0532 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-129 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-125 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G23-053 |
| filingDate | 1984-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb4a98ea367e47c1d6955cf7da261591 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bad4281737d9f0edf24ae3d8f9c6dcf6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fca6826f855b2ef53b93c8ed473d9c86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1fc66971b51a88a192fc6c457b791660 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3655f96bbf129e4a553c4af618a7d5f7 |
| publicationDate | 1989-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1255071-A |
| titleOfInvention | Process for the preparation of titanium dioxide |
| abstract | ABSTRACT In the preparation of titanium dioxide comprising autothermically digestion a titanium-containing raw material with sulphuric acid to form a solid relatively easily soluble digestion cake containing titanyl sulphate, extracting metal sulphates from this cake by water or dilute sulphuric acid, separating the undissolved residues and, optionally after crystallization of iron sulphate heptahydrate, hydrolyzing the titanyl sulphate to produce titanium oxide hydrate, and calcining the titanium oxide hydrate to titanium dioxide, the improvement which comprises adding to the raw material a metal sulphate and effecting the autothermic decomposition with sulphuric acid of about 80 to 88% concentration. Advantageously the acid is obtained by mixing dilute acid with concentrated sulphuric acid or oleum, some of the dilute acid and metal sulphate coming from a by-product filter cake produced in the course of the process. |
| priorityDate | 1983-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.