Results 1 - 10 of 7141
Results 1 - 10 of 7141. Search took: 0.027 seconds
|Sort by: date | relevance|
[en] Chemical basis for chloric reprocessing method of boron- and aluminosilicate raw materials are systematized in the monograph. Danburite chloric decompositions of Ak-Arkhar deposit in Tajikistan are described and chloric processes with participation of silica-alumina ores - nepheline syenites, kaolin clays, argillite and others. Optimal conditions for process conducting are revealed. Basic process flow diagrams fro boron- and aluminosilicate ores reprocessing by chloric methods are proposed. Besides, some specifics for low-temperature chlorination are described. The book is intended for scientific and engineer-technical employees, research and engineering institutes of chemical industry in charge of boron and aluminium production engineering issues. It is also useful for post-graduates and students of chemical-engineering and metallurgical specialities. (author)
[en] Chlorination of aluminosilicate ores with inorganic chloride salts and calcium chloride is considered in this work. The impact of different physicochemical factors on ore sintering with CaCl2 is studied. The influence of sintering temperature is studied at 600-100 deg C temperature range. It is defined that the optimal sintering temperature is 850-950 deg C. Dependence of extraction rate on sintering temperature, ratio of raw materials, process duration and size of material were studied.
[en] Present work is devoted to growing and preparation of samples of monocrystal of organic compounds for acoustic measurements. The method of growing of monocrystals of some organic compounds (dibenzyl, naphthalene, tolan and stilbene) is proposed. The scheme of equipment for growing of monocrystals of organic compounds from melt is proposed as well.
[en] Present work is devoted to 1.5-dihydro-7.8-dimethoxy-3 H-benzo[E]-2.4-dithiepyns - new cyclic sulfurous compounds. Thus, new dithiol - 4.5-dimethoxy-1.2-benzenedimethanethiol is synthesized. The number of new dehydrated benzo[e]-2.4-dithiepyns are obtained by interaction of 4.5-dimethoxy-1.2-benzenedimethanethiol with aldehydes at presence of concentrated hydrochloric acid in the medium of dioxane.
[en] Present work is devoted to influence of nature of monohydric alcohols on electroreduction of strontium ions on mercury-dripping electrode. Thus, the influence of nature and structure of 13 alcohols on electroreduction of strontium is studied. Obtained results allowed to elaborate the method of strontium determination in natural waters.
[en] Present work is devoted to synthesis and magnetic properties of solid solutions of Gd_4Bi_3-Gd_4Sb_3. Results of synthesis and studies of crystallochemical and magnetic properties of solid solutions Gd_4Bi_3_-_x-Sb_x (x=0.3-2.7) of Gd_4Bi_3-Gd_4Sb_3 system are considered. The crystallochemical studies shown that solid solutions Gd_4Bi_3_-_x-Sb_x (x=0.3-2.7) crystallize in cubic structure anti-Th_3P_4 type. The values of Curie paramagnetic temperatures of solid solutions and magnetic moments of Gd"3"+ are defined. (author)
[en] The parameters of organic solar cells on the base of different organic semiconductors as poly epoxypropyl carbazole, copper phthalocyanine and bordeaux perylene are considered. Moreover the properties of solar cells on the base of n-GaAs and copper phthalocyanine heterostructure are described. The new technologies in the field of organic solar cells as bulk heterostructure solar cells are discussed. (author)
[en] The results of theoretical and experimental researches on influence of temperature dependence of thermophysical and optic parameters of medium on properties of excited thermal waves in solids are analyzed. (author)
[en] The method of the pulse magnetic field induced changes at the oxide nanoparticles defect subsystem monitoring is developed on the basis of electrochemical impedance spectroscopy. The possibility of directed usages of electromagnetic low-energy actions (pulse magnetic field, H=10"5-10"6A/m) for a management of the phase boundary co-operation processes on the consolidation of ZrO_2+3 mol%Y_2O_3 composition disperse system were demonstrated. (author)
[en] Present article is devoted to physicochemical study of concentration and complex formation of Cu, Bi, Sb, Cd, Pb and Zn in dispersed organic substance of sedimentary rocks. Therefore, the processes of complex formation and concentration of some metals (Cu, Bi, Sb, Cd, Pb and Zn) in seven fractions extracted from dispersed organic substance of sedimentary rocks were studied by means of voltammetry method.