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Phan Bích Hà, Nguyễn Khánh Thy, Nguyễn Diệu Linh, Nguyễn Thị Thiên Hằng(1), Trần Hoàng Phương

Tổng hợp 5-hydroxymethylfurfural từ cellulose sử dụng xúc tác silica-amorphous carbon và choline chloride:CrCl3.

Synthesis of 5-hydroxymethylfurfural f-rom cellulose using silica-amorphous carbon and choline chloride:CrCl3

Khoa học & công nghệ Việt Nam

2023

03B

12 - 17

1859-4794

Deep eutectic solvent, Xúc tác silica-amorphous carbon, 5-hydroxymethylfurfural, Cấu trúc

Deep eutectic solvent, Silica-amorphous carbon, 5-hydroxymethylfurfural

Chất xúc tác silica-amorphous carbon (SAC) gắn nhóm SO3H bằng phương pháp than hóa không hoàn toàn glucose và sulfon hóa với H2SO4 đậm đặc đã được điều chế thành công và xác định cấu trúc bằng phổ hồng ngoại (FTIR), giản đồ nhiễu xạ tia X (XRD), phương pháp phổ tán sắc năng lượng tia X (EDX). Vật liệu này được ứng dụng làm xúc tác cho phản ứng tổng hợp 5-hydroxymethylfurfural (HMF) từ cellulose dưới sự hỗ trợ của dung môi cộng tinh sâu (DES - Deep eutectic solvent) choline chloride (ChCl):CrCl3. Các kết quả cho thấy, hiệu suất HMF cao nhất tại nhiệt độ phản ứng 140ºC trong 1 giờ với hàm lượng cellulose 162 mg, 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) 6 mmol, xúc tác SAC 10 mg và DES ChCl:CrCl3 0,5 mmol. Đặc biệt, chất xúc tác có khả năng thu hồi và tái sử dụng 3 lần với hiệu suất giảm không đáng kể trong quá trình chuyển hóa cellulose thành HMF.

The silica-amorphous carbon bearing SO3H group was synthesised by incomplete carbonisation of glucose and sulfonation with concentrated H2SO4 and the structure was determined by FTIR, XRD, and EDX. In this study, their catalytic activities were investigated in the synthesis of 5-hydroxymethylfurfural (HMF) f-rom cellulose with choline chloride:CrCl3 deep eutectic solvent (DES). The results showed the highest yield of HMF at a reaction temperature of 140ºC for 1 h with 162 mg cellulose, 6 mmol [EMIM]Cl, 10 mg silica-amorphous carbon and 50% mol DES ChCl:CrCl3. In particular, the catalyst was able to recover and reuse three times with a small decrease in yield for the conversion of cellulose to HMF.

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