Azerbaijan National Academy of Sciences

Gorkhmaz Mansur oglu Huseynov

On the basis of local raw material PbSO4 was gained by oxidizing the lead concentrate with H2O2 , was soluted with NaCl solution and made aqua-solution with 98,5% reduction. So the PbSO4.NaCl complex was reduced with NaBH4 the metal lead was gained with purity degree of 98,9. In water and organic environments in the reactions among AgNO3 with Na3AsS3 and NaAsS2, Ag3AsS3 and AgAsS2 combination were gained, the individuality of the combination was proved via RFA method. Melting temperatures were calculated via DTA (4950C and 4270C). Modification temperatures were calculated of the combination of Ag3AsS3 and AgAsS2.. Ag3AsS3 melts congruently and AgAsS2 melts incongruently. It means in 3230C breaks on peritectic reaction and Ag3AsS3+As2S3 is formed. Analogically Cu3AsS3 and CuAsS2 combinations were also gained and their melting and polymorph changing temperatures, also their densities were determined. The chemical and polymorph analyses of Daridagh arsen and antimony ores were made, arsen and antimony sulfides were defined to be above 50%. During their solution sodium sulfide and sodium hydroxide it turned out that the size of the cells are 0,12-0,105mm, temperature 353-363K, if the length of the process is 20-25 minutes solution of arsen sulfide is 95,5%, antimony sulfide is 97,5%. In the gained concentrate number of As2S3 is 98,75%, but antimony sulfide is 99,50%. The formation circumstance of In2Se3 combination was studied, physical-chemical parameters were defined.

Indium(III)hydroxide sediment was gained from indium(III)chloride and ammonium hydroxide, the method of forming method of In2Se3 were tried on this reaction. The electronic, microscopic, x-ray gravimetric, thermogravimetric analyses of the gained combinations was fulfilled. In water and ethylene glycol environment from the mutual influence of silver(I) nitrate and tin(IV) sulfide 4 combinations - Ag8SnS6, Ag2SnS3, Ag4SnS4 and Ag2Sn2S5 were synthesised. The micromorphology of those combinations was learned under the microscope HITACHI TM 3000. Their thermodynamic parameters were determined. On the basis of Hibbs energy the stability constants were calculated. pH-f(C) diagrams were set up and their permanence borders were determined. It was defined that in strong acid (H2SO4, HNO3) and alkaline (NaOH, KOH) environments disjoint of the combinations (pH<2 and pH>9) happen. Numbers of the thermodynamic function were calculated. The element analyse of the sediment was made in dilutionrefrigerator – OXFORD apparatus. The weight and nuclear quotient of silver, tin, sulphur within the combinations were determined.