Catalysts on the metal block carriers for decrease exhaust gases of motor transport were synthesized and tested. Stability of the carrier and the active phase of the catalysts to poisons SO 2 and oxygen in the processes of cleaning of exhaust gases was studied. In the presence of 3% oxygen, the catalyst activity was considerably increased, especially for Co+Mn and Ni+Mn, but increase in content of oxygen to 10% reduced effectiveness of catalysts. Nickel-manganese catalyst promoted with 0.1 wt.% Pt was the most stable against oxygen influence. The activity of catalysts based on Pt, Pt+Pd, Pd in presence of SO 2 decreased at low test temperatures, but after calcination at 500°C with air blowing for 2 h activity of Pt catalyst was almost returned and reached 80%. After the tests of the catalysts at the stand on the basis of the diesel generator (5GF-LDE with power of 5 kVA) degree of conversion of CO was 99.6%, hydrocarbons-80.7 %, nitrogen oxides -60-61.9%.
The work aim was preparation of catalysts with various active phase on metal block carriers and test their effectiveness on exhaust gases of the stationary diesel generator at various loadings. The active phase was prepared on the basis of the platinum group metals, oxides of nickel, manganese. The catalyst on the basis of 0.1% of Pt kept the activity during 100 h. test on the diesel generator. The most effective catalyst at all engine operating conditions was the sample containing 5% of nickel oxide and manganese and activated of 0.1% Pt. The catalytic samples on the basis of Ni and Mn promoted by Pd (0.1%, 0.25%) and Pt (0.1%), provide high degree of conversion of CO to CO 2 , C x H y to CO 2 and H 2 O, NO to N 2 .
Silatranes arouse much research interest owing to their unique structure, unusual physical–chemical properties, and diverse biological activity. The application of some silatranes and their analogues has been discussed in several works. Meanwhile, a comprehensive review of the wide practical usage of silatranes is still absent in the literature. The ability of silatranes to mildly control hydrolysis allows them to form extremely stable and smooth siloxane monolayers almost on any surface. The high physiological activity of silatranes makes them prospective drug candidates. In the present review, based on the results of numerous previous studies, using the commercially available 3-aminopropylsilatrane and its hybrid derivatives, we have demonstrated the high potential of 1-organylsilatranes in various fields, including chemistry, biology, pharmaceuticals, medicine, agriculture, and industry. For example, these compounds can be employed as plant growth biostimulants, drugs, optical, catalytic, sorption, and special polymeric materials, as well as modern high-tech devices.
This article reviews lithium recovery methods from primary resources and lithium raw materials processing methods. Lithium world reserves as well as deposits by countries are given. Summary of global market for and marketing of lithium raw materials are provided. The main lithium recovery methods from minerals (sulphate, lime, sulphuric) are shown. The data about obtaining in Kazakhstan an experimental sample of lithium carbonate from spodumene ore is provided.
News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community. Қазақстан Республикасы Ұлттық ғылым академиясы "ҚР ҰҒА Хабарлары. Химия және технология сериясы" ғылыми журналының Web of Science-тің жаңаланған нұсқасы Emerging Sources Citation Index-те индекстелуге қабылданғанын хабарлайды. Бұл индекстелу барысында Clarivate Analytics компаниясы журналды одан әрі the Science Citation Index Expanded, the Social Sciences Citation Index және the Arts & Humanities Citation Index-ке қабылдау мәселесін қарастыруда. Webof Science зерттеушілер, авторлар, баспашылар мен мекемелерге контент тереңдігі мен сапасын ұсынады. ҚР ҰҒА Хабарлары. Химия және технология сериясы Emerging Sources Citation Index-ке енуі біздің қоғамдастық үшін ең өзекті және беделді химиялық ғылымдар бойынша контентке адалдығымызды білдіреді. НАН РК сообщает, что научный журнал «Известия НАН РК. Серия химии и технологий» был принят для индексирования в Emerging Sources Citation Index, обновленной версии Web of Science. Содержание в этом индексировании находится в стадии рассмотрения компанией Clarivate Analytics для дальнейшего принятия журнала в the Science Citation Index Expanded, the Social Sciences Citation Index и the Arts & Humanities Citation Index. Web of Science предлагает качество и глубину контента для исследователей, авторов, издателей и учреждений. Включение Известия НАН РК в Emerging Sources Citation Index демонстрирует нашу приверженность к наиболее актуальному и влиятельному контенту по химическим наукам для нашего сообщества.
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