The founder and editor-in-chief of the journal is the Academician of the National Academy of Sciences of the Republic of Kazakhstan, winner of the State Prize in Science and Engineering, Honored Scientist, Honored Inventor of the Republic of Kazakhstan, Doctor of Chemical Sciences, Professor, General Director of A.B. Bekturov Institute of Chemical Sciences awarded by the Order of Red Banner of Labor, Corresponding Member of the National Academy of Sciences of the Republic of Kazakhstan, Deputy Chief Editor. Zhurinov - President of the Republican Public Association "National Academy of Sciences of the Republic of Kazakhstan".
Zeynalov – Corresponding member of the National Academy of Sciences of Azerbaijan; Brahim Elouadi – Professor of the University of La Rochelle (French Republic); Dembitsky – Zelinsky Institute of Organic Chemistry of RAS, Academician of the Russian Academy of Natural Sciences, Doctor of Chemical Sciences, Professor; H. Zakirov – Director of the Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, Doctor of Chemical Sciences, Professor (Republic of Uzbekistan); G.A.
This article presents samples of laboratory work necessary to study an elective course "ion exchange polymers" of the chemistry of high molecular weight compounds. Innovative resource-saving technologies for the utilization of oily waste // The first international scientific conference "Science of the Future".
ОНА С β - ЦИКЛОДЕКСТРИНОМ
Phase equilibrium of the system Na,Ca||SO4,HCO3-H2O at 250С // An announcer is Tajik State University. Based on the obtained data, the phase complex diagram of the investigated system at 250 °C was first constructed. The agrochemical and economic properties of the use of a magnesium-containing phosphorus fertilizer enriched with a biological product based on Juniperus plant extract, potassium borate in the amount of 1.5 and 2.5 weight.
A relationship has been established between the catalytic activity of the studied oxide systems and the calculated values of proton affinity for the vanadyl oxygen of their surface, which is involved in the deprotonation of methyl substituents converted into a nitrile group. It should be assumed that improving the activity of the three-component V-Ti-Cr oxide catalyst is accompanied by a change in the phase composition of the system, due to the ability of chromium (III) oxide to form a chemical compound (chromium orthovanadate ) to shape. with vanadium pentoxide [2, 3] under heat treatment conditions. Thus, as a result of the research, it was found that the additives of chromium (III), tin (IV) and iron (III) oxides to the binary V-Ti oxide catalyst have a promoting effect leading to the increase of catalytic activity. under conditions of oxidative ammonolysis of β-picoline.
Modification of the binary V-Ti oxide system by addition of tin dioxide leads to a sharp increase in the activity of the catalyst in the reaction of oxidative ammonolysis of γ-picoline. 97 The three-component catalyst with the composition V2O5·8TiO2·8SnO2 is characterized by a high conversion of the starting material (95% at 330 °С) when loading 117.2 g γ-picoline per 1 liter of catalyst per hour (Figure 7) . One of the reasons for the observed synergistic effect [6] is due to the simultaneous promoting effect of titanium (IV) oxide and one of the chromium (III), tin (IV) or iron (III) oxides on the catalytic activity of the modified vanadium oxide contact may be an increase under their influence of nucleophilicity vanadyl oxygen involved in the separation of the proton from the oxidizable methyl substituent.
It should be noted that the results of theoretical calculations are consistent with the experimental data presented in the article on the relative activity of the studied catalysts in the processes of oxidative ammonolysis of β- and γ-picolines. Effect of SnO2 on the formation of the phase composition and catalytic properties of a vanadium-titanium catalyst // News from the Academy of Sciences of Kazakhstan. On the role of SnO2 in the formation of the catalytic properties of the V2O5-TiO2 system in the oxidative ammonolysis of β-picoline // News from the Academy of Sciences of Kazakhstan.
The effect of pre-sowing seed preparation and foliar fertilization of biologically active substances on the yield of green mass of a mixture of wheat and peas // Materials of the international conference "State and perspectives of agricultural science of the northern region". CHANGE IN THE CHEMICAL COMPOSITION OF PLANTS OF CEREAL-PAS MIXTURES UNDER THE ACTION OF BIOLOGICAL PREPARATIONS. In this case, the chemical composition of feed mixtures, their productivity and nutritional value were determined.
In this article, the chemical composition, number of bioactive substances and macro-microelements in the above-ground part of Taraxacum kok-saghyz Rodin plants are treated. This article presents the results of the synthesis of new and known ionic compounds based on 2-diethylamino-N-(2,4,6-trimethylphenyl)acetamide (trimecaine) under the classical conditions and using microwave and ultrasound activation.
Synthesis of trimecaine based ionic compounds
IR spectra were recorded on a «Nicolet 5700 FT-IR» spectrometer using KBr pellets. The progress of the reactions and the purity of the products were checked by the TLC method on silica gel plates (Sigma Aldrich®, Germany) with the development of iodine vapors. A Cole Parmer ultrasonic probe (50–60Hz, 0–240 W) and a homemade microwave generator (0–800 W) were used for the reaction. Separation and purification of substances was carried out by crystallization from suitable solvents. The obtained extract is dried for 12 hours with anhydrous calcium chloride. The solvent is removed by simple distillation.
The obtained isolated product was separated and purified by crystallization and the purity of the product was checked by TLC using a mixture of diethyl ether and ethanol (4:1 or 5:1) as eluent. 15 ml of acetonitrile was added to the 100 ml flask and 0.01 mol of trimecaine was dissolved. The solution of 0.011 mol iodoalkane iodoalkane was then added and the reaction mixture was placed in a US reactor and the contents reacted under US conditions characterized by the following parameters: US = 240 W at 30–40 °C.
The obtained isolated product was separated and purified by crystallization and the purity was checked by the TLC with a mixture of diethyl ether and ethanol (4:1 or 5:1) as an eluent. Then the solution of 0.011 mol of iodoalkane was added and the reaction mixture was placed in a MW reactor and the contents were reacted under MW conditions at 80 W. The obtained isolated product was separated and purified by crystallization and the purity was checked by the TLC using a mixture of diethyl ether and ethanol (4:1 or 5:1) as an eluent.
Spectral and other data for the synthesized compounds
Therefore, the results of the experiments carried out confirmed the positive effect of non-conventional reaction conditions. Before starting the experiment, the catalysts were reduced with hydrogen directly in the reactor itself. CHEMICAL RESEARCH AND ISOLATION OF POLYSACCHARIDES FROM THE GROUND PART OF THE PLANT ARCTIUM LAPPA.
Compounds of calcium, silicon and aluminum predominate in the mineral part of the Kenderlyk shale (table 1). Study of the structure of compounds of products of thermal dissolution of kerogen-70 from the Baltic oil shale kukersite. A synthesis of the supramolecular inclusion complex of 1-methyl-4-(3-(naphthyl-1-hydroxy)prop-1-ynyl)piperidin-4-ol with sulfated arabinogalactan was developed.
In continuation of our research, a synthesis of the supramolecular inclusion complex of 1-methyl-4-(3-(naphthyl-1-hydroxy)prop-1-ynyl)piperidin-4-ol with sulfated arabinogalactan was developed. A fragment of the assumed structure of the inclusion complex of 1-methyl-4-(3-(naphthyl-1-oxy)prop-1-ynyl)piperidin-4-ol with AG-SO3H is shown in figure 1. single signal with chemical shift δ 5.02 ppm was assigned to the protons of the secondary carbon atom C-10.
In the weak field region, chemical shifts of protons of the benzene nucleus are found. The protons of methine and methylene groups of the galactopyranose unit of the complex AG-SO3H resonate in the high field region. The values of chemical shifts of carbon atoms and hydrogen protons of the KN-2/AG-SO3H complex are shown in the table.
1H and 13C spectral data of the KN-2 and AG-SO3H in the free state and as part of the inclusion complex. Testing plant growth regulators by growing grape seedlings in the conditions of the Republic of Kazakhstan and the. It was shown that in the hydrotreating process of coal distillates with a boiling point in the range of 180-360 °С, the values of thermal effects are 200-220 kJ/kg, depending on the composition of the raw material.
The characteristics of the hydrogenate produced are in Table 3, and the characteristics of the diesel fuel component (sample 2) are in Table 2. Ion exchange methods of scandium extraction from ores of the Tomtor deposit // Russian Metallurgy (Metal ).
