The application of potassium hydroxide is very extensive. In addition to our previous articles, it can be used to produce facial cleanser, prepare refractory adhesive, and add it to concrete, it can also be used to produce degreaser. Let's take a look at it in detail.
It can saponify animal and vegetable oil with stearic acid and produce water-soluble sodium stearate and glycerin. However, when the concentration is low and the pH value is less than 10.5, the sodium stearate will hydrolyze and the oil removal effect is not very good. However, if the concentration is too high, the solubility of sodium stearate and surfactant will be reduced, resulting in poor washability. Although potassium hydroxide can remove oil, the oil itself is not easy to remove. Therefore, the general dosage should be in the range of 100g / L, and most of them should be between 50g / L and 70g / L, so as to achieve good cleaning effect.
The degreasing fluid is suitable for steel, copper and copper alloy, aluminum and aluminum alloy, etc., with good degreasing effect. However, it is necessary to control the time in use to avoid metal corrosion. Because of its strong corrosiveness, it is necessary to wear protective equipment when using. Oily alkaline wastewater needs to be neutralized before being discharged. It is also suitable for all kinds of reactive dyes. When applied to all kinds of reactive dyes, its structure has better color and reproducibility.
The method of using potassium hydroxide as degreaser is described above. It is necessary to control the dosage and time to avoid the corrosion of the equipment requiring oil removal.