Method for producing xanthophyll
A technology of lutein and extract, which is applied in the field of preparing food-grade high-purity lutein, can solve the problems of high production cost and many product isomers, improve solubility, avoid degradation and isomerization, and shorten saponification The effect of reaction time
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Embodiment 1
[0036] Add 130g of marigold extract (10.1% lutein content), a mixed solvent of 270ml ethanol and tetrahydrofuran, wherein the ratio of ethanol: tetrahydrofuran is 6: 1, add successively in a 1000ml three-necked bottle, dissolve, and heat to 50°C, continue Stir for 10 minutes until the extract is completely dissolved. Dissolve 26.0g of KOH in 120ml of water, slowly pour the solution into a three-necked flask, and stir evenly. The mixture was heated to 65 degrees Celsius and reacted for 1.5 hours. Stop heating, add 260ml of deionized water to the three-necked flask at the same time, continue to stir for 30 minutes, then filter, then vacuum-dry at 50°C for 2 hours to obtain 15.6g of an orange-yellow crude product with a lutein content of 75.5%. The yield of lutein was 89.7%.
[0037] Take 10.0g of crude lutein, add 2.5L of acetone, heat to 50°C to dissolve, filter while hot, and then wash the insoluble matter with 0.5L of hot acetone until the color of the residue turns brownis...
Embodiment 2
[0040] Using the same raw materials and the same amount of solvent as in Example 1, add it to a 1000ml three-neck bottle for dissolution, heat to 50°C, and continue stirring for 10 minutes until the extract is completely dissolved. Dissolve 26.0g of KOH in 120ml of water, slowly pour the solution into a three-necked flask, and stir evenly. The mixture was heated to 60°C and reacted for 1.5 hours. Stop heating, then add 260ml of deionized water to the three-necked flask, continue to stir for 30 minutes, then filter, and vacuum dry at below 50°C for 2 hours to obtain 15.5g of orange-yellow crude product with a lutein content of 74.7%. The saponification temperature is 60°C, and the yield of lutein is 88.2%.
[0041] Take 10.0g of crude lutein, add 2.5L of acetone, heat to 50°C, filter while hot, and then wash the insoluble matter with 0.5L of hot acetone until the color of the residue turns brownish yellow, remove the insoluble matter, The acetone solution was combined, and at...
Embodiment 3
[0044] Using the same raw materials as in Example 1, the ratio of the mixed solvent for saponification is ethanol: tetrahydrofuran = 5.5: 1.2. Add 130g of marigold extract and 270ml mixed solvent to a 1000ml three-neck bottle to dissolve in sequence, heat to 50°C, and continue stirring for 10 minutes until the extract is completely dissolved. Another 26.0g of KOH was dissolved in 120ml of water, and then the solution was slowly poured into a three-neck flask, stirred evenly, heated to 65°C, and reacted for 1.5 hours. Stop heating, add 260ml of deionized water to the three-necked flask at the same time, continue to stir for 30 minutes, then filter, and vacuum dry at 50°C for 2 hours to obtain 15.7g of an orange-yellow crude product with a lutein content of 74.5%. The yield of lutein was 89.0%. The proportion of tetrahydrofuran in the above mixed solvent increased, but the yield and purity of lutein did not change significantly.
[0045] Take 10.0g of crude lutein, add 2.5L of...
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