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Physicochemical substantiation and improved more effective technologies for C-hydrocarbons separation and 1,3-butadiene purification with the help of polar extragents are given, such as compressorless extractive rectification with the use of an intermediate desorbent, extractive rectification of the butane- n-butene fraction with preliminary isomerization of 1-butene into 2-butenes, the combined removal of -acetylenes C and methylallene by rectification with a small introduction of the extragent, and the hydration of butenyne in the C fraction and distillation of propyne from it. [ABSTRACT FROM AUTHOR]

This paper discusses basic distinctions and challenges of available commercial process technologies for fractionation of phenol and acetone products, and for removal of contaminants therefrom. Theoretical improbability of complete removal of impurities from the desired products under fractionation process conditions is conclusively demonstrated. The challenge of achieving an adequate quality of desired products (i.e., of phenol, acetone, and α-methylstyrene) has been effectively met within the framework of state-of-the-art phenol/acetone production process. [ABSTRACT FROM AUTHOR]