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Priority to RO138361ApriorityCriticalpatent/RO103222B1/en
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Publication of RO103222B1publicationCriticalpatent/RO103222B1/en
The process employs Mn chloride or sulphate soln. Pptn. of a complex of Mn from oxidn. in the presence of KMnO4 or H2O2 and orthophosphoric acid and with heating to 300-350 deg. C, is followed by repeated washing in demineralised water. Filtration, washing with ethyl alcohol, and drying completes the process.
RO138361A1989-02-221989-02-22Production method of a cosmetic pigment based on mn(iii)nh4p2o7
RO103222B1
(en)