Clarification of linseed oil. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Clarification of linseed oil. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Here are some recipes clarification of linseed oil.

1st recipe

Clarification is carried out by heating, for which crude oil is kept at a temperature of 30 ° C for 275 minutes. The faster such heating is carried out, the faster and more perfectly the coagulation of protein substances will occur. This coagulation occurs best at 275-310°C. But, despite all of the above, it is better to heat the oil slowly until foaming stops. After heating, the oil is left to cool, and the precipitate, which has a light brown color, settles to the bottom. Then the oil can be drained or filtered. If heating is carried out in an iron cauldron, then the oil acquires a reddish color, similar to the color of drying oil; if it is heated in an aluminum cauldron, the result is a light yellow-amber oil.

2st recipe

A mixture of equal parts of crude oil and hot water is steamed for 1-2 hours. After that, the oil is allowed to settle, then the water will collect at the bottom of the vessel, the transparent oil will float to the top, and the sediment will take a middle position between water and oil. After 5 days, a transparent layer of oil is lowered into the boiler and heated for 2 hours to 110 ° C to remove the remaining water. It is recommended to add 1% sulfuric acid to the mixture of oil and water before passing steam. This method simultaneously bleaches the oil, which, moreover, clarifies much faster. You can also add a few more pounds of fuller or barite sulphate, which will drag the sediment to the bottom and thus shorten the clarification time. This sediment can be used to prepare putty, and the craftsmen who make it are happy to acquire these sediments. The oil processed by this method has a very light color.

3st recipe

Shake 250 parts of linseed oil in a glass flask with a solution of 5 parts of potassium permanganate to 125 parts of water, leave to stand for 24 hours in a warm place and then add 7,5 parts of crushed sodium sulphate, and after complete dissolution - 10 parts of hydrochloric acid. After the mixture has discolored with good stirring, the oil is washed with water, to which a little chalk has been added, until the reaction of the flowing water is no longer acidic; to free it from water, the oil is filtered through anhydrous Glauber's salt.

Author: Korolev V.A.

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