| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3b3293609182779feb06bd1fe1193846 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B19-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B19-02 |
| filingDate |
1972-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_06dab478814722a59ca47e7bfec6d77d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a45eeaa7a8c72cb79f5907c1da27afbe
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c294389c68387e8ccf1ac67846d0708f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5aa714abbe991e4ac4037d2a561e3d01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4952d9b63dbe25d14d88350c2ca2cff0 |
| publicationDate |
1974-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-2238544-A1 |
| titleOfInvention |
PROCESS FOR MANUFACTURING REINSTSELEN |
| abstract |
Commerical 90.98% Se is purified by zone melting in a continuous melting unit at 450-650 degrees C using air-, oxygen-, or a mixt. of air and 45-55% O2, prehated to 350-450 degrees C, and cond. nitric acid as catalyst. The catalyst is introduced at a rate of 20-30 g HNO3/kg oxidised Se, by passing the air, oxygen or air/oxygen mixt. through a column filled with concd. nitric acid. The Se dioxide is passed continuously through a packed column or fluidized bed in countercurrent to deionized water of spec. resistance >2 Megohm. Se acid soln. is treated with an ion exchanger and high purity Se is pptd. in known manner. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101112976-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112028033-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112028033-B |
| priorityDate |
1972-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |