INVESTIGATION OF EFFICIENCY OF NATURAL GAS DRYING BY ABSORPTION AND ADSORPTION METHODS

В статье проанализированы современные методы осушки природного газа для дальнейшей переработки его в метано-водородную смесь. Приведены результаты исследования абсорбционной и адсорбционной осушки природного газа жидкими реагентами (этиленгликолями) и твердыми адсорбентами (цеолитами и бентонитами). Показано, что природные бентонитовые глины обладают сравнительно небольшой адсорбционной активностью, их активация водными растворами Na2CО3 и H2SO4 способствует повышению адсорбционной активности, и их применение в комплексе с другими адсорбентами способствует значительному повышению процессов адсорбции. Авторами показана возможность и необходимость дальнейших исследований поиска эффективных методов активации бентонитовых глин. The article analyzes modern methods of drying natural gas for further processing it into a methane- hydrogen mixture. The results of studies of absorption and adsorption drying of natural gas with liquid reagents (ethylene glycols) and solid adsorbents (zeolites and bentonites) are presented. It is shown that natural bentonite clays have a relatively small adsorption activity, their activation with aqueous solutions of Na2CO3 and H2SO4 increases the adsorption activity, and their use in combination with other adsorbents contributes to a significant increase in the adsorption processes.The authors show the possibility and necessity of further research to find effective methods of activation of bentonite clays.

EXTRACORPOREAL DETOXICATION IN THE TOXIGENIC STAGE POISONING: TREATMENT RECOMMENDATIONS

Emergency extracorporeal blood cleansing must be performed in case of poisoning with highly toxic poisons (ethylene glycols, chlorinated hydrocarbons, methyl alcohol, organophosphorus compounds). Urgent - with severe poisoning with potent substances, which are characterized by a long period of a smoothed clinical course. Delayed — to the rest of the victims in case of severe poisoning and ineffectiveness of the main etiopathogenetic treatment within 6 hours according to the individual list of toxicants.

Correlations for Easy Calculation of the Critical Coalescence Concentration (CCC) of Simple Frothers

Can the critical coalescence concentration (CCC) of the flotation frothers be predictable? What is the relation between their molecular structure and their CCC values? A literature survey found specific correlations between the hydrophilic-lipophilic balances (HLB) and HLB/Mw (where Mw stands for the molecular mass) of homologue series of frothers and their CCC values, but the results are invalid when the molecule’s functional groups change. For this reason, 37 frothers with known values of CCC were analyzed. The CCC values of seven frothers were determined, and the rest were taken from the literature. The frothers were subdivided in homologue series with an increasing number of the carbon atoms with an account for the type and the location of the functional group, thus deriving three types of correlations lnCCC = f(HLB) applicable for: (i) alcohols; (ii) propylene glycols alkyl ethers and propylene glycols; (iii) ethylene glycols alkyl ethers. The average accuracy of these correlations between CCC and HLB is 93%.