Synthetic method for beta-carotene
A technology of carotene and synthesis method, which is applied in the field of synthesis of β-carotene, which can solve the problems of environmental pollution, unfavorable mass production, and inconvenient purification of products, and achieve the effect of simple reaction operation, less side reactions, and high purity
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Embodiment 1
[0040] A square electrolyzer with a capacity of 1L, which is equipped with inlet and outlet ports, cooling coils, thermometers, dropping funnels, and exhaust gas pipelines. The electrode material is a platinum electrode, and the two electrodes are respectively installed on two opposite sides of the electrolytic cell.
[0041] Mix 500ml of potassium carbonate aqueous solution with a concentration of 0.5 moles per liter and 250ml of vitamin A triphenylphosphine bisulfate solution with a concentration of 0.1 moles per liter, add to the electrolytic cell, and use 100A / dm 2 The current electrolysis for 4 hours. The reaction temperature was maintained at 15°C. After the reaction, filter out the precipitate, wash the precipitate with warm water at 65°C, filter, then heat with methanol at 65°C for 6 hours for isomerization, remove triphenylphosphine oxide, filter, and dry to obtain deep red β-carotene crystallization. The detected content of β-carotene was 99.2%, and the total yiel...
Embodiment 2
[0043] Electrolyzer is with embodiment 1.
[0044] Pour 500ml of KOH aqueous solution with a concentration of 0.5 moles per liter and 250ml of vitamin A triphenylphosphine hydrobromide aqueous solution with a concentration of 0.1 moles per liter into the electrolytic cell, and use 60A / dm 2The current electrolysis for 8 hours. The reaction temperature was maintained at 15°C. After the reaction, the precipitate was filtered out, washed with warm water at 65°C, filtered, then heated with methanol at 65°C for 6 hours for isomerization, and triphenylphosphine oxide was removed, filtered, and dried to obtain deep red β-carotene crystals. The detected content of β-carotene was 98.1%, and the total yield was 50.3%.
Embodiment 3
[0046] Electrolyzer is with embodiment 1.
[0047] Pour 500ml of sodium carbonate aqueous solution with a concentration of 0.5 moles per liter and 250ml of vitamin A tricresylphosphine hydrochloride aqueous solution with a concentration of 0.1 moles per liter into the electrolytic cell, and use 300A / dm 2 The current electrolysis for 8 hours. The reaction temperature was maintained at 15°C. After the reaction, the precipitate was filtered out, washed with warm water at 65°C, filtered, then heated with ethanol at 78°C for 4 hours for isomerization, and triphenylphosphine oxide was removed, filtered, and dried to obtain deep red β-carotene crystals. The detected content of β-carotene was 99.1%, and the total yield was 72.6%.
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