MECHANICAL RECYCLING IN LOW-WASTE PRODUCTION OF MULTILAYERED POLYETHYLENE FILMS

В работе рассмотрен рециклинг отходов производства многослойной полиэтиленовой пленки. Рассчитана экономическая эффективность инвестиций.The article discusses the recycling of waste production of a multilayer plastic film. The economic efficiency of investments is calculated

Historical Development of Technologies for the Industrial Production of Polyolefins

Various technologies for the industrial synthesis of polyolefins (PE) were considered, a comparative description of modern methods for the production of various PE and characteristic of the properties dependence of PE on the chosen production method were given in the course of this research work

USE OF A CLOSED WATER CYCLE SYSTEM IN THE PRODUCTION OF PROPANE DEHYDROGENATION

The article discusses the use of a closed water cycle system in the production of propane dehydrogenation. The economic efficiency of investments is calculated.В работе рассмотрено применение системы замкнутого водооборотного цикла в производстве дегидрирования пропана. Рассчитана экономическая эффективность инвестиций

REMOVAL OF ASPHALTENE-RESIN-PARAFFIN DEPOSITS

The work considers the selection of solvents for the effective removal of ARPD from the pipeline. The indicators of the efficiency of solvents were calculated and it was found that the composition of ethylcellosolve with the addition of the emulsifier Yalan-E2 possesses the best removal efficiency of ARPO.В работе рассмотрен подбор растворителей для эффективного удаления асфальтосмолопарафиновых отложений (АСПО) из трубопровода. Рассчитаны показатели эффективности растворителей и получено, что наилучшей эффективностью удаления АСПО обладает состав этилцеллозольва с добавлением эмульгатора Ялан-Э2

Criteria for aromaticity of mesoionic heterocycles

The quantum chemical calculations of the basic criteria for aromaticity (nucleus-independent chemical shift (NICS), aromatic stabilization energy (ASE), and parameters of harmonic oscillator model of aromaticity (HOMA), and geometric indices (I 5)) of 54 mesoionic heterocycles in the 6-31G*split-valence basis set were performed in terms of the density functional theory (DFT) with the B3LYP exchange-correlation hybrid functional. The aromatic nature of the mesoionic heterocycles containing the pyridinium N atom was shown. © 2012 Springer Science+Business Media New York