Tổng hợp một số chất lỏng ion dạng bisunfat ứng dụng để tách lưu huỳnh trong dầu diesel
Abstract
Các chất lỏng ion (IL) n-butyl metyl imidazol hydrosunfat ([BMIM][HSO4]) và n-butyl pyridin hydrosunfat ([BPy][ HSO4]) đã được tổng hợp và sử dụng làm dung môi cho quá trình chiết các hợp chất lưu huỳnh trong dầu diesel thương phẩm. Chất lỏng ion n-butyl metyl imidazol hydrosunfat có khả năng chiết lưu huỳnh cao hơn một chút so với chất lỏng ion n-butyl pyridin dihydrosunfat. Hiệu suất chiết lưu huỳnh đạt 98,5% và 96% tương ứng sau 6 lần chiết (tỷ lệ IL/dầu = 1:1, 25°C). Quá trình được thực hiện ở nhiệt độ và áp suất thường, không cần sử dụng hydro. Sau khi tái sinh bằng cách chiết với dung môi thích hợp, chất lỏng ion được sử dụng lại, khả năng chiết của chất lỏng ion giảm không đáng kể.
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