نتایج جستجو برای: Kaolin, Hydrothermal method
تعداد نتایج: 1645712 فیلتر نتایج به سال:
Hierarchical SAPO-34 zeolite with high crystallinity and excellent hydrothermal stability was directly synthesized in the nanoscale confined environment provided by the natural layered material kaolin.
The extensive use of zeolites as catalysts and catalyst suppo rts in heteregenous cll t:tly~i ... in the che mical and petrochemical industries is well established. Kaolin is a suitable aluminosilicate mineral which in appropriate conditions can be transformed to a three dimensional zeolite structure with a high surface area. A vast and dispersed kaolin deposites in the country are high p...
in solvo-hydrothermal method, xrd pattern was indicated presence of intermediate of ammonium octatmolybdate and ammonium tetramolybdate, which were changed to stble phase of ?-moo3 annealing. sem images were indicated nanoparticle with semispheical morphology and tem image was demonstrated nanoparticles with a diameter size of 25nm. also in impregnate method. the xrd pattern was shown high crys...
Kaolin has been widely used as an adsorbent to remove heavy metal ions from aqueous solutions. However, the lower heavy metal adsorption capacity of kaolin limits its practical application. A novel environmental friendly material, calcium alginate immobilized kaolin (kaolin/CA), was prepared using a sol-gel method. The effects of contact time, pH, adsorbent dose, and temperature on Cu2+ adsorpt...
After kaolin treatment of fetal rabbit serum, 7S antibody titers were reduced more than 19S titers. This reduction was less when the kaolin treatment was performed at pH 9.0 than when it was performed at pH 7.3. A modification of the kaolin treatment of sera for use in the hemagglutination-inhibiting antibody titration, in which the hemagglutination reaction is performed at a neutral pH, is rec...
Abstract We were the first to study natural kaolin and, on its basis, obtained a zeolite of HSZ-30 type. As samples selected Pakhtachinsky containing 68.8% mordenite (Ca 2,2 Na 2,1 K 2,9 Al 9,3 Si 42 , 2 O 98 ·36H O) and 31.2% quartz (SiO ). The sample was thoroughly washed with distilled water dried at 120 ° C for 6 days. Hydrothermal synthesis carried out in Mori type autoclaves volume 20 cm3...
This study aimed at demonstrating complementary roles offered by both Fourier transform infrared (FTIR) spectrophotometry and x-ray powder diffraction (XRPD) techniques in characterizing clay size fraction of kaolins. The clay size fraction of kaolin samples obtained from Kgwakgwe, Makoro, Lobatse and Serule kaolin occurrences and deposits in Botswana were characterized using laser diffraction ...
The Hizeh-Jan kaolin deposit (NW Varzaghan, East-Azarbaidjan Province) is a typical clayey deposit with andesitic host of Eocene age in northwestern Iran. Based on XRD analyses, the minerals of this deposit include kaolinite, pyrophyllite, quartz, smectite, muscovite-illite, hematite, goethite, anatase, alunite, diaspore, feldspar, hornblende, and calcite. Increasing SiO2/Al2O3 ratio from the c...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید