Potassium hydroxide is a common inorganic base with chemical formula of Koh, molecular weight of 56.1, and white powder or flake solid at room temperature. Similar to sodium hydroxide, strongly alkaline, corrosive, 0.1mol/L solution, pH13.5.
It easily absorbs moisture and deliquescence from the air, absorbing carbon dioxide to form potassium carbonate. Dissolve in 0.6 parts hot water, 0.9 parts cold water, 3 parts ethanol, 2.5 parts glycerol, slightly soluble in ether. When dissolved in water, alcohol, or acid treatment, a large amount of heat is generated. Moderate toxicity, moderate lethal dose (rat, oral) 1230mg/kg.
Potassium hydroxide is a solid sodium hydroxide with good chemical properties. It is widely used in fields such as agriculture and industry. Today, Xiaobian would like to introduce its application in Textile manufacturing. Let's take a look.
1. Good color
Using this product instead of soda ash for fixation, even if 1/10 of the product is used instead of soda ash, it can maintain sufficient color supply, and a small amount of excess will not affect the coloring of the fibers during operation.
2. Wide adaptability to dyes and equipment
It is suitable for all kinds of Reactive dye, and has high color rendering and reproducibility for all kinds of Reactive dye with different structures. In addition, Koh has shown good advantages in various equipment, mainly in low bath ratios and aerosol dyeing machines.
3. Shorten dyeing time
Also known as buffer solid base, it has less electrolyte and low Ionic strength when dissolved. Therefore, during the alkali addition process, the dyeing speed is slow, resulting in better levelness of the dye. In dark and light colors, alkali can be added in about 20 minutes to shorten the dyeing time.
It has good corrosion resistance, followed by nickel. Silver and nickel can withstand the concentration and temperature of sodium hydroxide until melting (480 ℃). It is suitable for high temperature and high concentration alkali, nickel and their alloys (such as Cr Ni Fe alloy, Monel alloy, etc.), and is a good choice.
Stainless steel can withstand NaOH solutions at temperatures below 40% -50% at 80-100 ℃, but cannot withstand high concentrations of high-temperature alkali. Carbon steel has good corrosion resistance in low temperature dilute NaOH solution and can form a solid oxidation protective film on the surface. Due to its low price, potassium hydroxide is often the choice of many users. For more related matters, come to our website http://www.ncbaviation.com Consult!