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The basic premises of the scientific-technical conception of perfection of traditional methods of adsorption purification based on the use of granulated and ground sorbents were analyzed. The expediency and efficiency of using cyclic regimes in tray-contact adsorbers was justified as a priority direction of the idea. Tasks for the further progressive introduction of the leading technology and equipment in adsorption purification practice were formulated.

A method of calculating the material resources utilization factorη m of the no-waste index was refined. The method is based on material balance of production (process) by components. A correlation was established between the characteristics of each element of a chemical technological system (CTS) and its topology, which can be used to correctly assess the degree of the no-waste character with consideration of the scale transition to the technological planning stage. New dependences were proposed for calculating the ecological safety factor which are valid for any ratio of the maximum permissible emission to the overall emissions.

Caprolactam was removed from local wastewaters in an experimental-industrial adsorption installation operating in a variable-cycle mode. The results of the study demonstrated the promise of using and the expediency of duplication of adsorbers with separate transport of the solid phase for purification of lactam waters.

Absorbers with a three-phase fluidized bed (centralized clean-up) and straight-through injectors (local clean-up) are very effective for decontaminating ventilation discharges containing caprolactam. The absorption process has been calculated in the recirculation of the absorbing agent in a closed loop.

A formula is given for evaluating the efficiency of using the method of shielding technological solutions. A satisfactory correlation has been found between the calculated and experimental data. Shielding technological solutions makes it possible to reduce losses of toxic and valuable substances in the manufacture of man-made fibres from polymer solutions and in other branches of industry.

Problems in development and quantitative evaluation of low-waste synthetic fibre technology have been examined. Examples have been given of improvement in existing technological processes and development of new ones to ensure economies in material and energy resources; and contemporary schemes for neutralizing discharges into air and water have been described.

It is recommended to use a mixture based on caprolactam and benzoic acid, with small amounts of added water, for the low-temperature condensation of CL vapor in the synthesis of PCA under vacuum.