Liquid-vapor equilibrium in systems which include paraffins, naphthenes, olefins, benzene, N-methylpyrrolidone, and water

Journal Article · Wed Jul 20 00:00:00 EDT 1983 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6942731

Miroshnichenko, A A

The selection of efficient separating agents for the extractive fractionation of aliphatic-aromatic hydrocarbon systems has fundamental importance in technology of preparing pure aromatic hydrocarbons. It has been shown previously that N-methylpyrrolidone (NMP) can be used as an efficient separating agent for paraffin-aromatic hydrocarbon, naphthene-aromatic hydrocarbon, or olefin-aromatic hydrocarbon systems. It was previously shown that the presence of water in the NMP increases its selectivity in the heptane-benzene system. However, the limited number of systems studied which contain heptane does not allow one to make a judgment about the relative volatility of paraffins, naphthenes, olefins, and benzene in mixtures with NMP containing water. Moreover, the complexity of the indicated systems causes definite difficulties in the experimental study of the isobaric liquid-vapor equilbrium for determining the relative volatility ..cap alpha../sub i-j/ of nonaromatic hydrocarbons, i, and benzene, j, as a function of the concentration of an extractant containing water, X/sub r/. The author has previously made studies of methods of calculating liquid-vapor equilibrium in the analogous systems with anhydrous NMP from a limited amount of information about liquid-vapor equilibrium. Therefore the objective of this work was to perform analytical calculations and an experimental check of liquid-vapor equilibrium in systems which included paraffins, naphthenes, olefins, benzene, NMP, and water.

• OSTI ID: 6942731
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 56:2; Other Information: Translated from Zh. Prikl. Khim.; 56: No. 2, 274-277(Feb 1983)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALKANES
FRACTIONATION
PHASE STUDIES
ALKENES
BENZENE
CYCLOALKANES
PYRROLIDONES
WATER
AROMATICS
EQUILIBRIUM
HYDROCARBONS
PHASE TRANSFORMATIONS
SEPARATION PROCESSES
AMIDES
AZOLES
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
LACTAMS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PYRROLES
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)