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[Chemical Knowledge]：Production and manufacturing method and process flow of potassium oxalate

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potassium oxalate manufacturing method

1. introduction

potassium oxalate is an important chemical production of raw materials, widely used in medicine, food, printing and dyeing and other fields. This article will introduce the manufacturing method of potassium oxalate in detail, including raw material preparation, reaction process, post-treatment and precautions.

2. raw material preparation

1. Oxalic acid: Oxalic acid is the main raw material for the preparation of potassium oxalate. Oxalic acid with high purity and low moisture should be selected to ensure product quality.
2. Potassium hydroxide: potassium hydroxide as alkali source, and oxalic acid reaction to generate potassium oxalate.
3. Water: For dissolving raw materials and washing products, deionized water or distilled water should be used to avoid the introduction of impurities.

3. reaction process

1. Dissolve oxalic acid: add oxalic acid into the reaction kettle, add appropriate amount of water to stir and dissolve, and obtain oxalic acid solution.
2. Add potassium hydroxide: potassium hydroxide dissolved in water, slowly added to the oxalic acid solution, while stirring, so that the two fully reacted.
3. pH value control: by adding potassium hydroxide solution, control the pH value of the reaction system in the appropriate range, in order to ensure the formation of potassium oxalate.
4. Heating reaction: The reaction kettle is heated at an appropriate temperature to promote the reaction. At the same time, it is necessary to control the reaction temperature to avoid the decomposition of potassium oxalate.

4. Post-treatment

1. Filtration: After completion of the reaction, unreacted solid impurities were removed by filtration.
2. Washing: The filter cake was washed with a small amount of water to recover unreacted oxalic acid and potassium oxalate.
3. Drying: The filtrate and washings are combined and concentrated by evaporation to give crystals of potassium oxalate. The crystals were dried to give the final potassium oxalate product.

5. Precautions

1. Control reaction temperature: Potassium oxalate is easy to decompose at high temperature, so it is necessary to control the reaction temperature within a suitable range.
2. pH value control: pH value has an important influence on the formation and stability of potassium oxalate, and it is necessary to strictly control the pH value within an appropriate range.
3. Avoid the introduction of impurities: In the process of raw material preparation and post-treatment, the introduction of impurities should be avoided to ensure product quality.

6. conclusion The manufacturing method of

potassium oxalate includes raw material preparation, reaction process, post-treatment and other steps. In the preparation process, it is necessary to strictly control the reaction temperature, pH and other parameters to avoid the introduction of impurities to ensure product quality. Through the manufacturing method introduced in this paper, potassium oxalate products with high purity and good stability can be prepared, which can provide high-quality raw materials for chemical production.

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