Open AccessFORMATION OF AZEOTROPIC MIXTURES OF N-METHYLPYRROLIDONE WITH HYDROCARBONS
Author(s) -
Alexey V. Kameshkov,
«Kinef» Ltd,
Alexander A. Gaile,
Vasily N. Klementyev,
Sofya D. Usanova
Publication year - 2021
Publication title -
izvestiâ sankt-peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)
Language(s) - English
Resource type - Journals
ISSN - 1998-9849
DOI - 10.36807/1998-9849-2020-56-82-12-16
Subject(s) - alkylbenzenes , boiling point , naphthalene , chemistry , boiling , limiting , alkane , thermodynamics , raw material , wax , hydrocarbon , organic chemistry , benzene , mechanical engineering , physics , engineering
Using the limiting activity coefficients of the components of binary systems of N-methylpyrrolidone with n-alkanes and the conditions for the formation of azeotropes, it is found that N-methylpyrrolidone forms azeotropic mixtures with n-alkanes С9 - С 15, with alkylbenzenes С 10 - С 12 and with naphthalene. The formation of azeotropes with saturated hydrocarbons with a boiling point of 230-270 ° C must be taken into account when developing a technological scheme for the N-methylpyrrolidone regeneration unit, and also not to use this extractant for extraction purification of raw materials with a boiling point below 230 ° C