پديد آورنده :
رضايت ، مرضيه
عنوان :
استفاده از كربن دي اكسيد فوق بحراني به عنوان حلال در سنتز و جداسازي استرهاي گليسرول استات به روش پيوسته
گرايش تحصيلي :
شيمي تجزيه
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي
صفحه شمار :
هجده،115ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حسن قاضي عسگر
استاد مشاور :
محمد يلپاني
توصيفگر ها :
تري استين , دي استين , منو استين , آمبرليست 15 , سيليكا سولفوريك اسيد , ﴿H-ZSM-5(x , مايع يوني متيل ايميداز وليوم هيدروژن سولفات , جز به جز كردن
تاريخ نمايه سازي :
14/9/89
استاد داور :
يدالله يميني، علي دانشفر، تقي خياميان
كد ايرانداك :
ID330 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
1 Continuous Synthesis and Separation of Glycerol acetate Using supercritical Carbon Dioxide as a Benign Solvent Marzieh Rezayat rezayat@ch iut ac ir Date of Submission Department of Chemistry Isfahan University of Technology 84156 83111 Isfahan Iran 1st Supervisor Prof Hassan S Ghaziaskar ghazi@cc iut ac ir 1st Advisor Prof Mohammad Yalpani Department of Graduate coordinator Bijan Najafi Department of Chemistry Isfahan University of Technology 84156 83111 Isfahan Iran Abstract Supercritical carbon dioxide was used as a benign and environmentally friendly solvent for both synthesis and separation of glycerol acetates Therefore at the first step the effect of important variables on the esterification reaction such as pressure 65 300 bar temperature 100 150 C molar ratio of acetic acid to glycerol 1 5 40 solvent and substrates flow rates reactor geometry and catalyst reusability have been investigated using Amberlyst 15 as a solid acidic catalyst Moreover the esterification reaction was studied over three catalysts of silica sulfuric acid zeolite H ZSM 5 x and methyl imidazolium hydrogen sulfate as an ionic liquid at the optimized variables of the above reaction The feasibility of partially selective extraction of triacetin from a mixture of triacetin diacetin and monoacetin with a molar ratio of 1 2 1 using a semi continuous setup At the best conditions of 109 bar 56 C 0 86 mL min 1 and 61 min the percent extraction was about 62 6 triacetin accompanied by only 16 8 diacetin and no monoacetin detected Then a continuous fractionation setup equipped with a glass bead packed column kept under a thermal gradient of 56 to70 C was carried out based on the results of continuous recovery of triacetin from the acetins mixture with acetic acid Keywords Glycerol acetate supercritical carbon dioxide synthesis Amberlyst 15 supercritical fluid extraction thermal gradient packed column
استاد راهنما :
حسن قاضي عسگر
استاد مشاور :
محمد يلپاني
استاد داور :
يدالله يميني، علي دانشفر، تقي خياميان
