Tagatose producing process
A production process, tagatose technology, applied in application, food preparation, food science, etc., can solve the problems that are not suitable for large-scale production of tagatose, and achieve the effect of easy product separation, simple process operation, and broad market prospects
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Embodiment 1
[0012] Production of tagatose by isomerizing galactose with sodium aluminate
[0013] Weigh 50 grams of D-galactose, add 450 milliliters of water, and make a 10% aqueous solution. Dissolve 25 g of sodium aluminate in 45 ml of water. Then add the sodium aluminate solution into the D-galactose solution, stir and react at 20°C for 2.5 hours. Cool the solution in ice for 10 min, then add 10% H 2 SO 4 The solution produced a white precipitate, and after standing for 10 to 30 minutes, filtered to remove the precipitate. The tagatose solution is obtained, and the solution is concentrated and crystallized with a rotary evaporator to obtain tagatose. HPLC analysis showed that the conversion rate of galactose into tagatose was 82%.
Embodiment 2
[0015] Production of tagatose by isomerizing galactose with sodium aluminate
[0016] Weigh 200 grams of D-galactose, add 800 milliliters of water, and make a 20% aqueous solution. Dissolve 50 g of sodium aluminate in 100 ml of water. Then add the sodium aluminate solution into the D-galactose solution, stir, and react at 20°C for 2 hours. The solution was cooled in ice for 20 minutes, and then 20% HCl solution was added to produce a white precipitate, which was allowed to stand for 10 to 30 minutes, and filtered to remove the precipitate. The tagatose solution is obtained, and the solution is concentrated and crystallized with a rotary evaporator to obtain tagatose. HPLC analysis showed that the conversion rate of galactose into tagatose was 80%.
Embodiment 3
[0018] Production of tagatose from lactose
[0019] Dissolve 500g of lactose in 1500mL of water, add 5-10mL of concentrated hydrochloric acid to the solution after dissolution, and then add 4-6mL of hydrogen peroxide solution. Stir and react at 30-60°C for 1-2 hours. After the solution became clear, the water was removed with a rotary evaporator, and the galactose and gluconic acid were separated by crystallization to obtain pure galactose.
[0020] Weigh 100 grams of the above-mentioned galactose, and make a 10% aqueous solution. Dissolve 50 g of sodium aluminate in 90 ml of water. Then add the sodium aluminate solution into the galactose solution, stir, and react at 25°C for 2 hours. After cooling the solution in ice, add 10% H 2 SO 4 The solution produced a white precipitate, and after standing for 10 minutes, it was filtered to remove the precipitate. The tagatose solution is obtained, and the solution is concentrated and crystallized with a rotary evaporator to obta...
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Abstract
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