Modernization of chemical cleaning of waste from the production of varnish collodions
Abstract
A study was conducted of the process of chemical purification of waste from the production of varnish collodions, namely, the so-called trap collodion (TCL). It was found that the maximum effect of removing iron compounds and hardness salts sorbed by TCL fiber is achieved with the combined presence of nitric and phosphoric acids in the cooking solution. Based on the conducted studies, a process for cleaning nitrate cellulose return waste was developed. It was shown that the cost of collodion made from TCL, depending on the degree of TCL contamination, is 20-40% lower than the cost of collodion obtained by processing cellulose.
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