Drying oils on resinous desiccants (resinates). simple recipes

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Drying oils on resinous desiccants (resinates). Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Drying oil is prepared mainly with the help of resin driersalso called resinates, significantly accelerating the process of obtaining drying oil.

Resin salts of manganese, lead and cobalt are used as driers. Such a desiccant is obtained by fusing resin acids (usually harpius, rosin) with oxides of manganese, lead or cobalt, or by reacting the resin-sodium salt with soluble manganese, lead or cobalt salts (manganese chloride, acetic-cobalt salt, acetic lead salt), resulting in precipitation salts of resin acids, manganese, lead or cobalt.

Combined driers containing lead and manganese are also used. A commercially available desiccant is a solution of the described desiccants in turpentine. The preparation of such drying oils is carried out as follows.

Heat 100 kg of linseed oil to 140 °C, then add 2 kg of molten resin-manganese salt and stir vigorously for half an hour. When the temperature reaches 160 °C, allow the mixture to cool.

When using precipitated manganese resin salt, linseed oil is heated to 150 °C, after which manganese resin salt is added to it, after mixing it with a small amount of heated linseed oil. Heat at the same temperature for 2-3 hours. After 3-4 days, a light and clean drying oil is obtained.

Pour an appropriate amount of linseed oil into the cauldron and heat it until foam forms. The foam is constantly removed with the help of a flat shaft, and the scooped up oil is drained back into the boiler. When the oil stops foaming and its surface is inactive and smooth, well-dried lead litharge and manganese oxide are added. For 100 wt. hours of oil take from 2 to 3 kg of litharge and from 1 to 1,5 kg of manganese oxide. Increase the temperature and with periodic strong stirring (every 10 minutes) boil for 4-5 hours.

If during the test the beard of the goose feather shrinks, then the fire is reduced and vigorously mixed. It is necessary to ensure that there are no local overheating, and that the liquid does not ignite. When the release of steam begins to weaken, the stirring is stopped and the fire is extinguished.

The finished drying oil is left until completely cooled in a closed boiler, in which the undissolved parts of litharge and manganese settle, after which the drying oil is filtered through a cloth and poured into barrels.

Author: Korolev V.A.

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