A kind of method that potassium feldspar hydrothermal alkali method prepares potassium hydroxide

Abstract

The invention discloses a method for preparing potassium hydroxide from potassium feldspar through a hydrothermal alkaline method. The method comprises the following steps: S1, carrying out crushing treatment on the potassium feldspar: carrying out impaction and crushing on potassium feldspar with low potential energy by utilizing potassium feldspar with high potential energy; S2, carrying out ball milling treatment on the potassium feldspar under the action of a ball milling auxiliary agent; S3, immersing potassium feldspar powder into compound alkali liquid; heating and stirring, and filtering; collecting filtering dreg A and conveying the filtering dreg A into a potassium ion dissolving-out region; S4, stirring the filtering dreg A in concentrated sulfuric acid and filtering to obtain filtering dreg B and filtrate B; washing the filtering dreg B with hot water and collecting washing liquid; adding the filtrate B into the washing liquid and uniformly mixing to obtain a potassium iondissolving-out solution; S5, adding a barium hydroxide solution into the potassium ion solution; after reacting, standing and filtering to obtain filtrate C; evaporating, concentrating and purifying the filtrate C to obtain potassium hydroxide. The method provided by the invention has the advantages of simplicity in operation and high utilization rate of the potassium feldspar; the dissolving-outrate of potassium in the potassium feldspar is high and the yield of the obtained potassium hydroxide is high.

Description

technical field [0001] The invention relates to the technical field of potassium hydroxide preparation, in particular to a method for preparing potassium hydroxide by a potassium feldspar hydrothermal alkali method. Background technique [0002] Potassium hydroxide is a commonly used production raw material in the production of inorganic chemicals, daily chemical products, battery industry, and pharmaceutical industry. It is often used as analytical reagents, saponification reagents, and adsorbents for carbon dioxide and water, and has a large demand. At present, the method for producing Potassium Hydroxide is mainly to prepare Potassium Hydroxide with soluble Potassium Chloride as raw material by membrane method or ionic membrane method, yet, the annual output of Potassium Chloride is low, can't supply the demand of Potassium Hydroxide, and The purity of potassium hydroxide obtained by preparing potassium hydroxide from potassium chloride is low, which is not suitable for s...

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Problems solved by technology

At present, the method for producing Potassium Hydroxide is mainly to prepare Potassium Hydroxide with soluble Potassium Chloride as raw material by membrane method or ionic membrane method, yet, the annual output of Potassium Chloride is low, can't supply the demand of Potassium Hydroxide, and The purity of potassium hydroxide obtained by preparing potassium hydroxide from potassium chloride is low, which is not suitable for some fields that require high purity. It can only be imported from abroad, which will increase the use cost of potassium hydroxide