How to get ferric chloride?

Ivan Orlov
Ivan Orlov
February 1, 2013
How to get ferric chloride?

There are iron dichloride (salt of hydrochloric acid and 2-valent iron) and iron trichloride (salt of hydrochloric acid and 3-valent iron). Iron chloride (a salt derived from the interaction of HCl and Fe II) is the most significant for humans. It is used in jewelry and as a therapeutic agent for the prevention and treatment of iron deficiency anemia. In Russia, the tool is registered under the brand name "Gemofer". In the proposed article, we recall how to get ferric chloride II and III valence.

The method of producing ferric chloride

This drug is produced by chemical interaction of gaseous hydrochloric acid and iron. The reaction yields the formula iron (III) chloride - FeCl3.

The most accessible and simplest way to obtain 3-chloride ferric is the reaction resulting from the action of chlorine gas on iron filings.

2Fe + 3Cl2 = 2FeCl3

There is another interesting method of obtaining with the help of sulfur oxide (IV)

4FeCl2 + SO2 + 4HCl = 4FeCl3 + S + 2H2O

So, we sorted out how to get ferric chloride 3.

The method of producing ferric chloride

The work is carried out under the burden. In a porcelain tube 85 cm long and 3 cm in diameter, 150 g of iron filings are introduced. After that, it is placed in an electric tube furnace so that the tube with one end protrudes 18 cm from the furnace. The protruding end is inserted into the fireclay cylinder in which the sublimate of ferric chloride will condense. The tube is connected to the apparatus, where gaseous hydrochloric acid is obtained and a weak stream of this gas is fired. The speed of the jet gradually increases and is brought to 250 ml / min. At the same time, the oven is turned on to maintain the temperature around 900 * С. In the fireclay cylinder and in the protruding end of the tube, sublimate condensation begins, therefore, every half an hour the tube should be cleaned with a long spatula.

How to get ferric chloride 2 in a simpler way? This substance is obtained by etching steel products in hydrochloric acid.

Fe + 2HCl = FeCl2 + H2

As you can see, this reaction proceeds with the release of explosive hydrogen, therefore it is necessary to ensure good ventilation.

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