Stable state vitamin K3and method of preparing the same
A vitamin and stable state technology, applied in the field of stable vitamin K3 and its preparation, can solve the problem of high cost, achieve high economic efficiency, high biological activity, and inhibit the formation of isomers
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Embodiment 1
[0024]In the weight ratio: n (menadione): n (sodium metabisulfite): n (nicotinamide): n (sulfuric acid) = 1: 1.5: 0.8: 0.4 under certain conditions to synthesize stable vitamin K3 (MNB), on The yield of menadione can be increased to more than 75%, which greatly reduces the production cost and has extremely high economic and social benefits. The specific operation is as follows: add 100g (100%) menadione and 300ml of 80% alcohol aqueous solution into a 500ml reaction bottle, stir well for beating, then add 150g of sodium metabisulfite (content > 98%) and react at 40-50°C for 2 hours to reach a solution To clarify, add 85g of nicotinamide (content > 99%) and continue stirring to dissolve, then slowly add sulfuric acid dropwise to adjust the pH to 3-5 to obtain a large amount of white crystals, filter, wash, and dry to obtain 284.6g of pure high-stable K3, The yield was 75.6% (p-menadione).
Embodiment 2
[0026] The steady state vitamin K 3 , is made of the following materials by weight: 100g of menadione, 150g of sodium metabisulfite, 90g of nicotinamide, and 55g of sulfuric acid.
[0027] The steady state vitamin K 3 The preparation method is as follows: Add 100g of menadione and 300ml of 80% alcohol aqueous solution into a 500ml reaction bottle, stir well for beating, then add 150g of sodium metabisulfite and react at 40-50°C for 2 hours until the solution is clear, add 90g of nicotinamide and continue stirring to dissolve , and then slowly drop 55 grams of sulfuric acid to adjust the pH=3 to 5 to obtain a large amount of white crystals, which were filtered, washed and dried to obtain 285.8 g of pure high-stable K3 with a yield of 76.0%.
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