>
Fa   |   Ar   |   En
   Thermal Dislocation and Physical Changes During Preparation of Active Silicate of Group 2 Periods 3, 4 and 5 Elements From Spent Fines of Finishing Crystal Glass  
   
نویسنده Rabah Mahmoud Abdelhamed
منبع Advanced Journal Of Chemistry-Section A - 2019 - دوره : 2 - شماره : 4 - صفحه:283 -295
چکیده    This study reports on the thermal dislocation and crystal growth changes during preparation of active metasilicate of group 2 periods 3.4 and 5 elements from waste fines of finishing process of crystal glass (cg) industry. sodium carbonate fused the fines at ≈1273 k for 120180 minutes followed by water leaching. alkali silicate goes into solution.  primary chloride and sulphate salts of elements of group 2 periods 2, 4 and 5 added to the alkali silicate solution at temperatures 300 k to 353 k for 60 minutes to give metasilicate as a white precipitate followed by heating at 473 k to 1073 k for 30 minutes.  the study discussed the physical changes taking place after heating. results revealed that surface area and adsorption capacity of mn ions from underground water increased with the surface area of the silicate associating the decrease in atomic radius of the element. the effect of ph, concentration of the reactants and temperature on the synthesis and physical changes of the silicate salts has been investigated. formation of the silicate salt proceeded in a reaction sequence involving atom rearrangement to form a honeycomb structure with very narrow pore diameter amounting to 1.538 ằ.  heating silicate at 773 k dislocate the oxygen atoms around metal atoms to form unit crystals with mild pore diameter of 15.29 ằ. with further increase in temperature, narrow pore system collapses to form sponge structure with wider pore diameter and lower surface area. the manuscript tabulated the physical changes in digital presentation derived mathematically.
کلیدواژه Lead Oxide(S) ,Hydrometallurgy ,Magnesium Metasilicate ,Surface Adsorption
آدرس Central Metallurgical Research And Development Institute, Chemical And Electrochemical Treatment, Mineral Processing Dept, Egypt
پست الکترونیکی mrabah010@gmail.com
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved