Recently, the issue of intercultural relations between immigrants and the host society has been widely discussed. Taking into account the increasing spatial mobility of non-EU foreigners, it seems highly important to examine their relations with the host community on the local level. This article presents the results of the qualitative study conducted in the first quarter of 2014 in the Lesznowola municipality (Mazowieckie province, Piaseczno district) in Poland. It aims at analysing the situation of the Vietnam-ese community and its engagement in the local life of the municipality and examine attitudes of both Vietnamese and Poles towards prospects for granting local voting rights to migrants in Poland. Through several years of successful business and social cooperation, the Vietnamese immigrants have become a recognisable part of the social landscape of the municipality. The degree of social and political par-ticipation at the local level on the part of the Vietnamese community has also increased, which can be observed, for example, through such practical indicator as cooperation with local educational institu-tions. Therefore, we can argue that the Vietnamese community has been transforming itself from a marginalised and self-sufficient homogeneous group into more and more self-aware and active socio-political group of actors.

Numerical values of the NRTL equation parameters for calculation of the vapour - liquid - liquid equilibria (VLLE) at atmospheric pressures have been presented for 5 ternary mixtures. These values were fitted to the experimental VLLE and vapour - liquid equilibrium (VLE) data to describe simultaneously, as accurately as possible, the VLE and the liquid - liquid equilibria (LLE). The coefficients of this model called further NRTL-VLL were used for simulations of n-propanol dehydration via heterogeneous azeotropic distillation. The calculations performed by a ChemCAD simulator were done for 4 mixtures using hydrocarbons, ether and ester as an entrainer. In majority simulations the top streams of the azeotropic column had composition and temperature similar to the corresponding experimental values of ternary azeotropes. The agreement between the concentrations of both liquid phases formed in a decanter and the experimental values of the LLE was good for all four simulations. The energy requirements were the most advantageous for the simulation with di-npropyl ether (DNPE) and isooctane. Simulations were performed also for one mixture using the NRTL equation coefficients taken from the ChemCAD database. In that case the compositions of the liquid organic phases leaving the decanter differed significantly from the experimental LLE data.