The study of a three-stage alkaline hydrolysis of the natural lignin of cottonplant stems has shown that the bulk of the lignin undergoes fragmentation during stage I. The addition of anthraquinone leads to an appreciable increase in the yield of low-molecular-mass hydrolysis products.
541.6Binding of Al 3+ , Cu 2+ , and Co 2+ ions by carboxymethylcellulose (CMC) macromolecules was studied by potentiometric titration. It has been shown that the metal ions bind electrostatically over a wide pH range. Viscosimetry has found that the effectiveness of intermacromolecular CMC binding increases with increasing initial CMC concentration and in the presence of polybasic acids.
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