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Humic acids were separated from oxidized coals with a minimum yield of 50%. It was shown that sodium humate can be used for precipitating zinc from viscose plant wastewaters. Regardless of the concentration and pH of the wastewater, zinc is totally extracted from it. The zinc can be desorbed from the humate sediment in the form of zinc sulfate.
The species composition of cellulose from sulfite and sulfate methods of delignification manufactured by Kotlassk Pulp and Paper Combine and Baikal Cellulose Paper Combine was analyzed by a microscopic method. It was shown that an increase in the content of larch and deciduous wood fibres in cellulose decreases the capacity of cellulose for chemical processing in the viscose plant and the quality...
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