Palladium chloride producing process
A production method, palladium chloride technology, applied in chemical instruments and methods, inorganic chemistry, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, etc., can solve problems such as volatilization, palladium liquid overflow loss, etc., and achieve pollution-free Yield and the effect of shortening the production cycle
Inactive Publication Date: 2004-06-02
国内贸易部物资再生利用研究所
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[0002] Palladium chloride is mainly used to prepare special catalysts, molecular sieves, and surfactants for coating non-conductive materials. The traditional production method is mainly the aqua regia dissolution method, which needs to add concentrated hydrochloric acid in batches during the evaporation process of the solution. To drive away the excess nitric acid in the solution, thus causing a large amount of toxic gas nitrogen oxides to volatilize, and easily cause the overflow loss of the palladium solution
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[0009] Palladium chloride product is brown powder, soluble in hydrochloric acid, ethanol, acetone and hydrobromic acid. The analysis results are as follows:
[0010] 1. Element content in the product (%) Pd59.85; Pt0.005; Au0.005; Rh0.005; Fe0.005; Ir0.005; Ni0.003;
[0011] 2. Dilute hydrochloric acid dissolution test conforms to GB8185-87 index.
[0012] 3. Nitrate detection: None.
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The palladium chloride producing process includes placing spongy palladium powder into beaker, adding analytically pure concentrated hydrochloric acid in 3-4 times palladium powder weight to dissolve the palladium powder, heating to 60-70 deg.c, adding slowly analytically pure hydrogen peroxide in 1-2 times palladium powder weight through stirring, filtering, concentration and heating to form paste, stoving, grinding to obtain palladium chloride powder product. Using hydrogen peroxide, instead of nitric acid, as oxidant and no nitrate in solution can short the production period, avoid nitric oxide pollution and high product yield.
Description
technical field [0001] The invention relates to a method for producing fine chemical products, especially a production method for producing palladium chloride. Background technique [0002] Palladium chloride is mainly used to prepare special catalysts, molecular sieves, and surfactants for coating non-conductive materials. The traditional production method is mainly aqua regia dissolution method, which needs to add concentrated hydrochloric acid in batches during the evaporation process of the solution. To drive away the excess nitric acid in the solution, thus causing a large amount of toxic gas nitrogen oxides to volatilize, and easily cause the overflow loss of the palladium solution. The content of nitrate in the product palladium is required to be no more than 0.05%. Contents of the invention [0003] The purpose of the present invention is to provide a palladium chloride production method with short prod...
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IPC IPC(8): C01G55/00
Inventor 张方宇郑远东
Owner 国内贸易部物资再生利用研究所
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