Method for directly producing potassium stannate by using tin raw material
A technology for producing potassium stannate and potassium stannate, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., can solve the problems of high reaction conditions, leakage of toxic gases, and many production steps, and can shorten the concentration time, The effect of simplifying the production process and reducing the production cost
Inactive Publication Date: 2009-09-30
上饶旭日冶炼厂
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[0002] At present, the production of potassium stannate at home and abroad is based on refined tin as raw material. Potassium stannate can be obtained by reacting refined tin with concentrated nitric acid and then transforming. This production process will produce a large amount of nitrogen dioxide poisonous gas. , many production steps, great environmental pollution
The application number published by the Chinese Patent Office on December 6, 2006 is 2006100109457 and the invention name "New Method for the Production of Potassium Stannate" discloses a new method for the production of potassium stannate. The efficiency is high, and no harmful gas of nitrogen dioxide will be produced during the chemical reaction process; but this invention still has many production steps, such as: first react with chlorine gas, then neutralize with alkali to generate stannic acid, and then combine the generated stannic acid with Potassium hydroxide is used for the reaction; in particular, the reaction conditions between tin and chlorine gas are highly demanding. Chlorine gas itself is a dangerous product that is not easy to transport, and toxic gas leakage is prone to occur during the reaction process.
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[0012] refer to figure 1 , figure 1 It is a process schematic diagram of an embodiment of a method for directly producing potassium stannate by utilizing tin raw materials provided by the present invention: the tin raw material 1 containing 80% tin and 20% lead is put into a cast iron pot reactor 4, and poured into the cast iron pot Potassium nitrate 3, potassium hydroxide 2 and melted tin raw material 1 are gradually added into the pot reactor 4 for chemical reaction, stirring is carried out during the reaction to make the generated crude potassium stannate 5 float to the upper part of the cast iron pot reactor 4. The thick potassium stannate 5 is pulled out from the upper part of the cast iron pot reactor 4; the thick potassium stannate 5 taken out from the cast iron pot reactor 4 is placed in the grinding drum 6 and added with water 7 for grinding, and the thick stannate is made by grinding. Potassium 5 is dissolved, and the dissolved solution is refined and purified 8, an...
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The invention discloses a method for directly producing potassium stannate by using a tin raw material, which comprises the following steps: (1) performing chemical reaction on tin, a tin alloy potassium hydroxide and an oxidizing agent in a reaction kettle at a temperature of between 300 and 600 DEG C to obtain granular crude potassium stannate, and during reaction, gradually adding the potassium hydroxide and the oxidizing agent into the melted tin and the tin alloy until the reaction is complete; (2) dissolving the granular crude potassium stannate with water; (3) refining and purifying the dissolved solution; and (4) condensing, separating and drying the potassium stannate solution obtained by refining and purificating to obtain a finished product. The method is used for directly producing the potassium stannate by using the tin raw material.
Description
technical field [0001] The invention relates to a method for producing inorganic salts, in particular to a method for directly producing potassium stannate by utilizing tin raw materials. technical background [0002] At present, the production of potassium stannate at home and abroad is based on refined tin as raw material. Potassium stannate can be obtained by reacting refined tin with concentrated nitric acid and then transforming. This production process will produce a large amount of nitrogen dioxide poisonous gas. , many production steps and great environmental pollution. The application number published by the Chinese Patent Office on December 6, 2006 is 2006100109457 and the invention name "New Method for the Production of Potassium Stannate" discloses a new method for the production of potassium stannate. The efficiency is high, and no harmful gas of nitrogen dioxide will be produced during the chemical reaction process; but this invention still has many production...
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Inventor 李震彬
Owner 上饶旭日冶炼厂