LuËn v¨n th¹c sü Bïi ThÞ Thanh Hµ MỞ ĐẦU

1. 
   Tổng hợp vật liệu γ-Al₂O₃ bằng phương pháp sol-gel. Bằng nhiễu xạ tia X cho thấy chứng minh sản phẩm thu được có cấu trúc gamma.
   
2. 
   Tổng hợp được xúc tác Zn,P/ Al₂O₃ với thành phần Zn là 10,13%, thành phần P là 9,41%. Đặc trưng xúc tác bằng các phương pháp hóa lý hiện đại như XRD, EDS, BET,TPD cho thấy xúc tác có diện tích bề mặt lớn (~132 m²/g), đường kính mao quản tập trung ở khoảng 70-80 Ǻ, phù hợp với các phân tử triglycerit có kích thước lớn, và xúc tác có tính axit trung bình phù hợp cho những quá trình chuyển hóa các phân tử hữu cơ trong điều kiện êm dịu như quá trình este chéo hóa dầu, mỡ động, thực vật.
   
3. 
   Thực hiện phản ứng etyl este chéo hóa sử dụng xúc tác tổng hợp được ở trên với bốn loại mỡ là mỡ gà ri, mỡ gà công nghiệp, mỡ cá quả và mỡ cá trắm.
   
4. 
   Nghiên cứu được điều kiện phản ứng thích hợp là tỉ lệ etanol:mỡ là 15:1, nhiệt độ phản ứng là 50⁰C và thời gian phản ứng 12 giờ.
   
5. 
   Trong những điều kiện này đã phát hiện được mỡ cá và mỡ gà đều chứa các omega 3,6, tất cả đều không bị chuyển dịch vị trí nối đôi và giữ nguyên cấu hình Z sau quá trình phản ứng. Trong mỡ cá chứa nhiều loại omega 3,6 hơn và quan trọng hơn đối với sức khỏe của con người. Đặc biệt đã phát hiện chất chống ung thư EPA chỉ có trong mỡ cá quả trong bốn loại mỡ đã nghiên cứu.
   

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