Preparing method for tetraammineplatinum(II) dichloride
A technology of dichlorotetraammine platinum and chloroplatinum, applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc., which can solve the problem of unsuitable large-scale production and affecting product purity , Water pollution and other problems, to achieve the effect of environmental protection, product purity and high product quality
Inactive Publication Date: 2016-02-03
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology
Using hexachloroplatinum (IV) acid as raw material to prepare dichlorotetraammine platinum, the important step reaction is to reduce it to tetrachloroplatinum (II) acid. The traditional method uses sulfur dioxide as the reducing agent to easily produce sulfate radical impurities , affecting product purity
Chinese patent CN102502894 has reported that hexachloroplatinum (IV) acid is reduced with hydrazine hydrate as a reducing agent, but hydrazine hydrate is a highly toxic substance that pollutes water bodies and is not suitable for large-scale production
At the same time, ethanol is used as a crystallization reagent, and the cost is relatively high
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[0014] The present invention will be further described below in conjunction with the accompanying drawings, but the content of the present invention is not limited to the stated scope.
[0015] Such as figure 1 As shown, prepare tetrachloroplatinum (II) acid solution: weigh 5.18gH 2 PtCl 6 ·6H 2 O was added to a round bottom flask, 50g of water was added, stirred to dissolve it, and 1.97g of BaCO was added 3 After stirring evenly, add 20g containing BaS 2 o 6 2.97g of the solution, after reacting at 80°C for 24 hours, filtered off the precipitate to obtain tetrachloroplatinum (II) acid solution;
[0016] Prepare dichlorotetraammineplatinum solution: add 12 mL of 24% ammonia water to the above tetrachloroplatinum (II) acid solution, and reflux for 5 hours under normal pressure and boiling conditions until there is no green precipitate, and colorless dichloroplatinum is obtained. Platinum chloride solution;
[0017] Solvent crystallization: Concentrate the above solution ...
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The invention relates to a preparing method for tetraammineplatinum(II) dichloride and belongs to the field of fine inorganic chemical industry. According to the method, hexachloroplatinicacid(IV) is used as a raw material, barium dithionate is used as a reduction reagent, and under existence of an auxiliary, a hexachloroplatinicacid(IV) solution is reduced to be a tetrachloroplatinum(II) acid solution; ammonia water is added for ammoniation, complexing coordination is carried out on the tetrachloroplatinum(II) acid solution again to convert the tetrachloroplatinum(II) acid solution into a tetraammineplatinum(II) dichloride solution; ethyl alcohol / acetone is used as a crystallizing reagent, and the tetraammineplatinum(II) dichloride solution and the crystallizing reagent are mixed, so that tetraammineplatinum(II) dichloride is dissolved out from the solution; tetraammineplatinum(II) dichloride is filtered in a suction mode and dried to obtain a tetraammineplatinum(II) dichloride product. The preparing method for tetraammineplatinum(II) dichloride is high in conversion rate, the product quality is reliable, operation toxicity is small, cost is saved, and the method is suitable for industrialized large-scale production.
Description
technical field [0001] The invention belongs to the field of fine inorganic chemical industry, in particular to a method for preparing dichlorotetraammine platinum from hexachloroplatinum (IV) acid. Background technique [0002] Platinum dichlorotetraammine is an important raw material for the preparation of other platinum-containing compounds, and is commonly used in electroplating and catalyst preparation in industry. Using hexachloroplatinum (IV) acid as raw material to prepare dichlorotetraammine platinum, the important step reaction is to reduce it to tetrachloroplatinum (II) acid. The traditional method uses sulfur dioxide as the reducing agent to easily produce sulfate radical impurities , affecting product purity. Chinese patent CN102502894 reports the reduction of hexachloroplatinum (IV) acid by using hydrazine hydrate as a reducing agent, but hydrazine hydrate is a highly toxic substance, which pollutes water bodies and is not suitable for large-scale production. ...
Claims
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Inventor 赵甲于海斌孙国方费亚南李孝国臧甲忠高鹏李佳隋芝宇郑修新刘有鹏
Owner CHINA NAT OFFSHORE OIL CORP
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