surface modification method for improving absorption power of silica gel and removing method of siloxane and 2-way type removing apparatus of siloxane using the same

摘要

PURPOSE: A method of surface modification of silica gel, a method of removing siloxane using the silica gel surface-modified thereby, and a siloxane removing apparatus are provided to improve the adhesion of the siloxane by forming multiple curves through processing the silica gel with acids and bases, and to be able to simultaneously occur siloxane adhesion and adsorbent regeneration in the siloxane removing apparatus. CONSTITUTION: A method of surface modification of silica gel comprises a step of adding an acid to silica gel and stirring, and a step of adding base to the silica gel and stirring. The surface area of the silica gel increases due to curves formed on the surface of the silica gel. The acid is 1-30% of hydrochloric acid. The base is 1-30% of sodium hydroxide aqueous solution. A method of removing siloxane comprises a step of removing siloxane by adsorbing the siloxane to the silica gel surface-modified by said method. [Reference numerals] (AA) Pre-treatment; (BB,KK) Washing; (CC,LL) Drying; (DD) Acid treatment; (EE) Acid addition; (FF,JJ) Stirring; (GG) Base treatment; (HH) Base addition; (JJ) Post-treatment