Chestnut wood

B) A. Simoncini, ItalP 515805 (1955) CA 52, 15910 (1958) [Tannin contg expl mixts and flammable powders are prepd in the following examples 1) Powdered 76 parts KC103, mixed with 24 parts powd chestnut wood extract (I) (as a paste), dried and ground 2) Powd 38 pts KN03 mixed with 16ps (I) and another... 

Hammes K., R.J. Smemik, J.O. Skjemstad, A. Herzog, U.F. Vogt, M.W.I. Schmidt (2006). Synthesis and characterisation of laboratory-charred grass straw (Oryza sativa) and chestnut wood (Castanea sativa) as reference materials for black carbon quantification. Org. 

For many years, most of the leather in the United States was tanned with domestic tannins from hemlock and oak bark and from chestnut wood. Today only a small amount of tannin comes from these and other domestic sources. The most important source of vegetable tannin today is the wood of the quebracho tree, which grows mainly in Paraguay and Argentina. The tannin content of this tree and a few other sources of vegetable tannin are shown in Table 28.10. 

Pyrogallic acid tannins which yield tannic acids convertible into gallic and pyrogallic acids. These tannins give a blue-black color with ferric chloride and give no precipitate with bromine water. They also form a bloom on the leather from hides which have been treated with them. These include tannins of gall-nuts, sumach, oak and chestnut wood. 

Fig. 6.13. Structure of phenolic acids (a and b) and ellagitannins (c and d) in extracts from the duramen of oak and chestnut wood (Vivas and Glories, 1996)...

Chestnut Wood Extract - 150-200 66-93 - E — - phis organic and suHuroiis Kids and tannin... 

Domestic sources Eastern hemlock bark Western hemlock bark Tanbark oak Chestnut oak Black oak Chestnut wood Sumac leaves Foreign sources Quebracho heartwood Mangrove bark Wattle acacia bark) Myrobalan nuts Sicilian suma leaves... 

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