The Direct Nitration of Flax and Jute

Abstract

Three samples of flax and one sample of jute were nitrated with a mixture of HNO₃/H₃PO₄/P₂O₅ for several lengths of time, ranging from to 72 hr. The crude nitrate, Fraction A, was extracted with acetone and the acetone extract precipitated with water, giving three fractions: A1, the acetone-soluble fraction precipitated by water, A2, the acetone-insoluble fraction, and A3, the acetone- and water-soluble fractions. The DP's of Fraction A1 were determined. The mode of variation of the amount of Fraction A2 with time of nitration suggests the existence of intercarhohycirate links in jute but not in flax.

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