OBTAINING GREEN DYE FROM THE MIXED RARE-EARTH AND MOLYBDENUM COMPOUNDS AND METHOD OF OBTAINING SURFACE TREATMENTS FROM IT

摘要

1. A process for preparing inorganic pigment green from mixed rare earth elements and compounds of molybdenum, comprising the steps of: a) homogenizing the mixed rare earth carbonates and ammonium molybdate; b) calcining in air homogenate obtained in step a); c) cooling and consequent particle size reduction, where mixed rare earth carbonates used in step a) are a mixture of rare earth elements having atomic number ranging from 57 to 66, and having a composition, at least, lanthanum in the range of 43-45 wt. %, Neodymium in the range of 33-35 wt.% Praseodymium in the range 9-10 wt.% Samarium in the range 4-5 wt.% And other rare earth elements is not more than 5 wt.%. 2. The method of claim 1, wherein the temperature of calcination in step b) is in the range 900 ° C-1100 ° C.3. A method according to claim 1, wherein the calcination in step b) is in the range 3-6 hours at a heating rate of 10 ° C / Min.4. Green inorganic dye which contains mixed oxides of rare earth elements, and molybdenum, wherein the resulting said green inorganic dye has the general formula REMoO, wherein RE is mixed with rare earth metals, and Mo is molybdenum metal, and wherein the dye obtained from a mixed rare earth carbonate which is a mixture of rare earth the elements having atomic number ranging from 57 to 66 and having a composition, at least, lanthanum in the range of 43-45 wt.%, neodymium in the range of 33-35 wt.%, praseodymium m in the range of 9-10 wt.% samarium in the range 4-5 wt.% and other rare earth elements is not more than 5 wt.%. 5. Inorganic green dye according to claim 4, wherein the mixed rare-earth metal is in koliches