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Preparation of paraformaldehyde
- Jun 19, 2018 -

Paraformaldehyde, which is a kind of formaldehyde, is a white amorphous powder and has a formaldehyde odor. It is a linear polymer of formaldehyde and does not have a fixed melting point and can be decomposed by heating. This formaldehyde is soluble in water, caustic alkali and alkali metal carbonate solutions, but is insoluble in alcohols and ethers. In addition, its highly polymer is insoluble in water. Therefore, it can be used as a synthetic resin, a binder, a bactericide, an insecticide, and a disinfectant.


Paraformaldehyde must be prepared using paraformaldehyde production equipment or equipment, such as reaction vessels and refrigeration equipment. The specific process is to use a 37% strength industrial formaldehyde solution as a raw material, and then to Put in the reaction vessel and heat the appropriate amount of catalyst to carry out the reaction. When the reaction is completed, the refrigeration operation is performed, and paraformaldehyde is obtained at a temperature of -5°C to -20°C, followed by filtering, washing and drying to obtain a finished product.


In the preparation process of paraformaldehyde, the equipment used is relatively small, so the input cost of the paraformaldehyde production equipment is not very high, which helps to improve the product quality, reduce the production cost and allow the user to obtain Good economic benefits.