Method for producing tetraammine chloride crystals by taking ethanol as solvent

A dichlorotetraammine platinum and crystallization technology, which is applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc., can solve the problems of high energy consumption, large difference in crystal grain size, and distribution Inhomogeneity and other problems, to achieve the effect of mild reaction conditions, stable product quality, and guaranteed purity requirements

Inactive Publication Date: 2012-06-20
HOOTECH
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Problems solved by technology

The disadvantages are: (1) The synthetic production process is lengthy and the yield is low; (2) The crystalline form and particle size produced by the evaporation crystallization method, cooling crystallization method, and recrystallization method have large differences, uneven distribution, and unstable product quality; (3) ) High energy consumption, unfriendly to the environment

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  • Method for producing tetraammine chloride crystals by taking ethanol as solvent
  • Method for producing tetraammine chloride crystals by taking ethanol as solvent

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing.

[0013] Such as figure 1 As shown, the mother liquor with stable valence state is prepared: in the environment with negative pressure and tail gas treatment, the elemental platinum is dissolved in a ceramic or glass container with aqua regia reagent to make solution, and then it is treated with nitrate and acid to control The acidity and oxidation of the solution form a stable +4-valent chloroplatinic acid solution;

[0014] Preparation of metastable crystallization mother liquor: use hydrazine hydrate as the reducing agent, control the temperature, concentration, and flow rate of the hydrazine hydrate reducing agent, and process the +4-valent chloroplatinic acid solution to realize the +4-valent chloroplatinic acid solution To metastable +2 valent chloroplatinous acid solution transformation;

[0015] Preparation of tetraammine dichloroplatinum solution: After temperature...

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Abstract

The invention discloses a method for producing tetraammine chloride crystals by taking ethanol as a solvent, belonging to the technical field of petrochemical industry. The method comprises the following steps of: dissolving and transforming simple substance platinum serving as a raw material into a stable +4 valent chloroplatinic acid solution with royal water, and performing niter driving and acid driving treatment; controlling the final point of a reaction system to reduce the +4 valent chloroplatinic acid solution into a +2 valent chloroplatinous acid solution in a metastable state by taking hydrazine hydrate as a reducing reagent; adding ammonia water for aminating, complexing and coordinating the +2 valent chloroplatinous acid solution, and transforming into a tetraammine chloride solution; controlling the concentration of the tetraammine chloride solution, mixing the tetraammine chloride solution with ethanol serving as a crystalizing reagent, crystallizing, and quickly crystalizing and separating tetraammine chloride out of the solution; and performing suction filtration and drying to obtain a tetraammine chloride crystal product. The method has the beneficial effects of capability of ensuring the purity requirement of the product, stable and reliable product quality, high yield, mild reaction condition, easiness, practicability and environmental friendliness.

Description

technical field [0001] The invention relates to a method for producing dichlorotetraammine platinum crystals by using ethanol as a solvent, and belongs to the technical field of petrochemical industry. Background technique [0002] At present, the methods for producing tetraammonium dichloride platinum crystals at home and abroad generally adopt evaporation crystallization, cooling crystallization, and recrystallization; the raw materials used are chloroplatinic acid crystals or potassium chloroplatinite, and the requirements for raw materials are strict. The reducing agent used is sulfur dioxide, which is easy to produce sulfate radical impurities, which affects the purity of the product. It is necessary to increase the production of tetrachloroplatinum (II) tetraammine platinum (II) intermediate acid salt step for purification to remove sulfate to ensure product purity. . The disadvantages are: (1) The synthetic production process is lengthy and the yield is low; (2) The ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G55/00
Inventor 夏军胡永康董月兵郁丰善魏礼超李显赵慧安晓晓
Owner HOOTECH
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