Resin discoloration. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Resin discoloration. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Resin heated to 200 °C with three volumes of water and a small amount of caustic soda. When cold water is added to the mixture, the coloring substances in the resin go into solution, and clear, almost colorless resin is deposited at the bottom of the kettle. It is necessary to avoid adding a large amount of soda so as not to reduce the yield of purified resin, which under normal conditions should be only slightly less than the weight of the resin taken for bleaching. After the aqueous solution is separated, carbonic acid is passed into the boiler with the sediment for some time to prevent it from darkening due to oxidation.

The best results are obtained if the melting and, in general, the entire operation is carried out in a vacuum apparatus, which makes it possible to work at a lower temperature and completely separate the solution from the precipitate.

Author: Korolev V.A.

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