| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-62 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09C1-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G49-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C1-24 |
| filingDate |
1979-05-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1980-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7c9bf9e85d745a8d13ddc41173888787
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f95ca231e2e9ccd2d3132f30bc397d35
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bbc6f71c06ed72a5d3b955fd3f7b135f |
| publicationDate |
1980-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4234348-A |
| titleOfInvention |
Process for the production of iron oxide red pigments |
| abstract |
In the production of an iron oxide red pigment by reducing nitrobenzene with metallic iron in the presence of an acidic iron (II) salt solution, separating off the iron oxide pigment obtained from the reaction medium by washing out, and calcining the pigment at a temperature in the range of about 600° to 1100° C., the improvement which comprises adding an aluminum salt solution over a period of about 5 to 360 minutes at a temperature of about 20° to 100° C. to the iron oxide suspension accumulating during reduction of the nitrobenzene, the suspension containing about 150 to 600 g of iron/l and a residual iron (II) chloride content of about 20 to 160 g/l expressed as iron, the initial pH-value of the iron oxide suspension of about 3 to 5 being adjusted over a period of about 5 to 180 minutes to a final pH-value of about 5.5 to 6.5. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4373963-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5421878-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4753680-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005274284-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5730794-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7294191-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4358431-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5736239-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5837216-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4432803-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4702776-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5665157-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6086846-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101340315-B1 |
| priorityDate |
1978-06-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |