发明名称 |
METHOD OF BISMUTH-POTASSIUM-AMMONIUM CITRATE PRODUCING |
摘要 |
chemical technology. SUBSTANCE: invention relates to methods of processing bismuth-containing materials to obtain bismuth as solid compounds or solutions. Bismuth basic nitrate is precipitated from nitrate solutions at pH = 0.5-1.2 and temperature 15-35C and then converted to bismuth citrate at pH = 0.4-1.0 and initial temperature 15-40 C with the following its increase to 50-90 C. Bismuth citrate is dissolved in potassium hydroxide an aqueous solution in the presence of citric acid and ammonia at pH = 7-10 and temperature 50-90 C. The prepared solution is diluted with water and subjected for spraying drying. EFFECT: simplified process, decreased cost of product. 3 ex
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申请公布号 |
RU2189942(C1) |
申请公布日期 |
2002.09.27 |
申请号 |
RU20010119149 |
申请日期 |
2001.06.26 |
申请人 |
INSTITUT KHIMII TVERDOGO TELA I MEKHANOKHIMII SO R;AN |
发明人 |
JUKHIN JU.M.;AFONINA L.I.;APARNEV A.I.;DANILOVA L.E. |
分类号 |
C01D13/00;C01G29/00;C07C59/265;(IPC1-7):C01D13/00 |
主分类号 |
C01D13/00 |
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