Inventor
PIETSCH STEPHEN J
8 patents
⚠️ This page may combine multiple inventors who share the name “PIETSCH STEPHEN J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
STANDARD OIL CO INDIANA
5 patentsUS4298580ANov 3, 1981
Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means
STANDARD OIL CO INDIANA45 citations91
US4311521AJan 19, 1982
Membrane separation of catalyst metals from trimellitic acid production and separation of cobalt from manganese
STANDARD OIL CO INDIANA8 citations72
US4298759ANov 3, 1981
Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet
STANDARD OIL CO INDIANA11 citations72
US4309390AJan 5, 1982
Separation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnet
STANDARD OIL CO INDIANA4 citations61
US4308240ADec 29, 1981
Recovery of cobalt and manganese from ash of residue from manufacture of trimellitic acid by acid extraction
STANDARD OIL CO INDIANA3 citations61