Multifractional Separation of Polydisperse Particles Varying in Shape and Density

A description of the functional capabilities of the technology of multifraction separation of particles by density and shape in a polydisperse bulk material is given. The technology assumes a consistent and complex use of the effects of quasi-diffusion separation and segregation of particles in a fast shear flow on a gravity slope, as well as the use of traditional technological methods of particle shape calibration. The assessment of the effectiveness of using of multifraction technology for the production of biologically valuable seed material is given.

The Solution of the Problem of Separating a Mixture of Polydisperse Particles of Different Shapes

A technology is proposed for the separation of particles by shape in a polydisperse granular material using the effects of particle interaction in a fast shear flow on a rough slope. The technology involves the fractionation of the initial mixture by the volume of particles using the segregation effect at the first stage and the calibration of the obtained particle fractions by weight using the effect of quasi-diffusion separation (migration) in the gravity flow at the second. The final stage involves the separation of particles by shape by sieve classification of fractions according to a key geometric parameter.

REGULARITIES OF EXTRAGENT PREPARATION METHODS INFLUENCE FOR THE SUCHROSE EXTRACTION FROM BEET COSSETTES ON YIELD AND QUALITY OF FINISHED PRODUCTS

Показано влияние способа подготовки экстрагента для диффузионного процесса на качество продуктов диффузионного отделения диффузионного сока и свекловичного жома. Рассмотрены три способа подготовки поликомпонентного экстрагента обработка сернистым ангидридом, подкисление серной кислотой и подкисление серной кислотой с добавлением суспензии гипса. Установлено, что наибольшим эффектом угнетения мезофильных аэробных и факультативноанаэробных микроорганизмов и плесневых грибов 77,5 и 83,0 соответственно обладает сульфитированный экстрагент. Диффузионный сок, полученный с использованием сульфитированного экстрагента, является наиболее стерильным: эффект угнетения МАФАнМ составляет 91,7. Выявлено влияние способов подготовки экстрагента на модуль упругости свекловичной стружки и степень ее прессования. Установлено, что прирост содержания сухих веществ в прессованном жоме при обработке сульфитированным экстрагентом составляет около 3,3, что выше, чем при обработке экстрагентом, подкисленным серной кислотой и подкисленным серной кислотой с добавлением суспензии гипса. Сульфитационная обработка экстрагента способствует повышению чистоты диффузионного сока на 1,45 по сравнению с другими способами подготовки экстрагента. Усредненная величина показателя цветности, ед. оптической плотности, составила для образцов диффузионных соков, полученных при использовании экстрагента: сульфитированного 349,65 подкисленного серной кислотой 1869,63 подкисленного серной кислотой с добавлением гипса 466,54. Установлено, что экстрагент, обработанный сернистым ангидридом, способствует повышению качества продуктов диффузионного отделения. The influence of the method of preparation of the extragent for the diffusion process on the quality of diffusion facility semiproducts diffusion juice and beet pulp is shown. Methods of preparing multicomponent extragent treatment with sulfuric anhydride, the acidification with sulfuric acid and acidification with sulfuric acid with the addition of gypsum suspension of are considered. It was found that extragent with treatment by sulfuric anhydride has the greatest effect of inhibition of mesophilic aerobic and facultative anaerobic microorganisms and fungi 77,5 and 83,0 respectively. The diffusion juice, obtained using extragent with treatment by sulfuric anhydride is the most sterile: the effect of the oppression of mesophilic aerobic and facultative anaerobic microorganisms is 91,7. The influence of extragent preparation methods on the elastic modulus of beet cossettes and the degree of its pressing was revealed. It was found that the increase in the content of solids in the pressed pulp when treated with extragent with treatment by sulfuric anhydride is about 3,3, which is higher than when treated with an extragent acidified with sulfuric acid and acidified with sulfuric acid with the addition of gypsum suspension. The extragent with treatment by sulfuric anhydride helps improve the purity of the diffusion juice by 1,45 compared with extragents that are processed in other ways. The average values of chromaticity, units of optical density, was for samples of the diffusion juice, obtained using an extragent: treatment with sulfuric anhydride 349,65 acidified with sulfuric acid 1869,63 acidified with sulfuric acid and containing gypsum 466,54. It was found that the extragent prepared by treatment with sulfuric anhydride improves the quality of diffusion separation products.

POLYCYCLOALCANE HYDROCARBONS IN TARIBANI OIL

For the purpose of extraction and identification of cyclic alkane hydrocarbons in oil from the Taribani field, Georgia, concentrates isolated from 200-350oC fractions have been studied. The concentrate preparation included the following steps: (a) distillation of a crude oil, (b) dearomatization of distillates by silica gel, (c) three-stage thermal diffusion separation of isoalkanes and cycloalkanes, and (d) thiourea adduction. Ten thermal diffusion fractions were obtained. A mixture of the IX and X fractions and separately the VIII fraction were studied. The extracts from these fractions with thiourea were studied as well. Composition of concentrates has been determined by the gas chromatography – mass spectrometry (GC-MS) method.The main components of the VIII thermodiffusion fraction were C11- C22 isoprenoid alkanes. Among them the predominant were pristane C19 and the phytane C20, the well-known biomarkers of oil. In the VIII thermodiffusion faction including dimethyl-, trimethyl-, tetramethyl-, ethyl-, methyl-ethyl-, diethyl-, propyl, methyl-propyl adamantanes, were identified.