| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C1-3692
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C3-043
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C3-041
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-0532
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G23-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G23-053
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G23-08 |
| filingDate |
1990-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09f673959ac2f8ec42dceaa537d7212e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a00c3864737d62257d3158c873160e03 |
| publicationDate |
1991-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2030386-A1 |
| titleOfInvention |
Process for the production of ti02 pigments |
| abstract |
In the production of TiO2 pigments by the steps of digesting titanium-containing raw materials with sulfuric acid, hydrolyzing the titanyl sulfate obtained, separating the waste acid from the hydrolyzate, bleaching the hydroly-zate and calcining the hydrolyzate after addition of rutilizing nuclei and standardizing chemicals to form TiO2 pigments, and recovering sulfuric acid from the waste acid, the improvement which comprises employing as the rutilizing nuclei nuclei produced from part of the bleached and then washed hydrolyzate, which nuclei are added to the remainder of the bleached and washed hydrolyzate before calcination. |
| priorityDate |
1989-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |