Registration Number
0218U000445,
0117U002820
, R & D reports
Title
Structured hierarchically-porous zeolite materials based on natural obsidian - effective sorbents and catalysts of acid-base reactions
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Head
Shvets Oleksiy Vasylyovych,
Registration Date
29-01-2018
Organization
Institute of Physical Chemistry L.V.Pisarzhevsky NAS Ukraine
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Using hydrothermal recrystallization of obsidian or perlite at optimal values of pH of the PC and temperature NaX zeolites with FAU topology, which is an effective high-capacity ion exchanger. Preliminary treatment of obsidian or perlite in acidic media, as well as optimization of the reaction medium composition (in particular, pH regulation, change of the HTT temperature, introduction of an additional source of silicon in PC) allowed to obtain high crystalline phases of other zeolites, in particular ANA, GIS and the most promising acid catalyst - MOR. The concomitant use of quaternary ammonium salts as an additional templates for the synthesis of MOR resulted in the formation of zeolite materials with high adsorption characteristics and the hierarchy of the porous system. H-forms of hierarchical zeolites of MOR structural type are characterized by a high concentration (up to 550 ?mol/g) of strong acid centers (the temperature of the maximum desorption of ammonia is about 490 °С, -8.5 < Н0 < -11.3), which is a prerequisite for the creation on their basis of effective acid-base catalysts for a number of processes of fine organic synthesis.5481
Product Description
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Конишева Катерина Михайлівна
Курмач Михайло Миколайович
Черненко Жанна Василівна
Швець Олексій Васильович
Яремов Павло Степанович
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2020-04-02
