Methods for removing ammonia from natural latex

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Methods for removing ammonia from natural latex: 1. Formaldehyde neutralization method. First, calculate the amount of formaldehyde required to remove the ammonia using the formula 6HCHO + 4NH3 → (CH2)6N4 + 6H2O; then add an appropriate amount of non-volatile stabilizer (such as potassium hydroxide) to the latex and mix well. Then, while continuing to stir, slowly add the 38% formalin solution until the required amount has been added. If the ammonia content remaining in the latex is high (above 0.4%), no additional stabilizer is needed before adding formaldehyde. 2. Stirring and aeration method. Typically, air is blown over the surface of the latex while it is being stirred, thereby quickly driving away the ammonia that escapes from the latex until its concentration drops to the desired level. 3. The formaldehyde neutralization method is fast in removing ammonia, but it is highly irritating and tends to form small clumps; therefore, its operational requirements are quite strict. When adding formaldehyde, the speed must be slow; it has to be added while stirring. Although the stirring and blowing method achieves good ammonia removal, its production efficiency is low.