Structure of the lignin of cotton plants of the subspeciesmexicanium
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The nitrobenzene oxidation and cleavage with metallic sodium and liquid ammonia and with thioacetic acid (TAA) of the natural lignin of cotton plants of the subspeciesmexicanium and of the dioxane lignin (DLA) isolated from it have been performed. A comparison of the yields of the products and their compositions has shown that the most complete and reliable results are given by cleavage with TAA, under which a considerable part of the lignin suffers destruction. The high content of monomeric and dimeric fractions in the products of TAA cleavage shows a low degree of condensation of the lignin of cotton plants of the subspeciesmexicanium.
KeywordsVanillin Cotton Plant Syringyl Liquid Ammonia Caustic Soda
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