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Tanning, or hide tanning, is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed. Historically, vegetable based tanning used tannin , an acidic chemical compound derived from the bark of certain trees, in the production of leather.
They are used to stably disperse pesticides, dyes, carbon black, and other insoluble solids and liquids into water. As a binder it suppresses dust on unpaved roads. It is also a humectant and a in water treatment. [5] Chemically, it may be used as a tannin for tanning leather and as a feedstock for a variety of products.
Aluminium nitrate is a strong oxidizing agent. It is used in tanning leather, antiperspirants, corrosion inhibitors, extraction of uranium, petroleum refining, and as a nitrating agent. The nonahydrate and other hydrated aluminium nitrates have many applications.
A large number of different tanning methods and materials can be used; the choice is ultimately dependent on the end application of the leather. The most commonly used tanning material is chromium, which leaves the leather, once tanned, a pale blue colour. This product is commonly called “wet blue”.
Tannins have been used since antiquity in the processes of tanning hides for leather, and in helping preserve iron artifacts (as with Japanese iron teapots). Industrial tannin production began at the beginning of the 19th century with the industrial revolution, to produce tanning material for the need for more leather.
Lignosulfonates are used in tanning leather, making concrete, drilling mud, drywall and so on. [14] Oxidation of lignosulfonates was used to produce vanillin (artificial vanilla), and this process is still used by one supplier (Borregaard, Norway) while all North American production by this route ceased in the 1990s. [15]
Zirconium sulfate is used in tanning white leather, as a catalyst support, to precipitate proteins and amino acids, and as a pigment stabilizer. References [ edit ]
The copperas solution was used in the leather tanning industry. Copperas works are manufactories where copperas (iron(II) sulfate) is produced from pyrite, often obtained as a byproduct during coal mining, and iron. The history of producing green vitriol, as it was known, goes back hundreds of years in Scotland. [1]
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