831-61-8

64-17-5

149-91-7

831-61-8

1. 100 g of gallic acid and 150 g of ethanol were added to the reactor. 2. 35 g of bromine-modified sulfonic acid resin (prepared as in Example 2) was added. 3. The reaction mixture was heated to 80°C for 5 hours. 4. After completion of the reaction, the filtrate and the bromine-modified sulfonic acid resin were separated by filtration. 5. The filtrate was distilled to remove excess ethanol to obtain the crude product. 6. The crude product was recrystallized using deionized water. 7. The recrystallized product was dehydrated and dried. 8. Ethyl gallate was obtained in 98% yield and 99% purity. 9. The crude product was recrystallized using deionized water. 7. The recrystallized product was dehydrated and dried. 8. Ethyl gallate was obtained with a yield of 98% and a purity of 99.9%. 9.