Feed additive and feed
A feed additive and feed technology, applied in the direction of animal feed, additional food elements, applications, etc., can solve the problems of uneven product quality, ulcers, negative effects, etc.
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Embodiment 1
[0029] Add 500kg of dichloromethane and 154kg of cysteamine into a 2000L enamel reaction kettle, cool down to 0-5°C with frozen brine, slowly add 204kg of acetyl chloride (over 30%), and drop 200kg of triethylamine at the same time to maintain the temperature Reaction at 0-5°C, when no cysteamine can be detected, stop the reaction, raise the temperature to 38-45°C, distill out dichloromethane for recovery (recycling), add 1000kg of cold water, and separate 200kg of N-acetylcysteamine , detected by liquid chromatography, the content was 99.1% (N-acetyl cysteamine standard sample was purchased from SIGMA, USA), and the yield was 97.9%.
Embodiment 2
[0031] Add 500kg of dichloromethane and 154kg of cysteamine into a 2000L enamel reaction kettle, cool down to 0-5°C with frozen brine, slowly add 277kg of butyryl chloride (over 30%), and dropwise add 200kg of triethylamine to keep the temperature Reaction at 0-5°C, when no cysteamine can be detected, stop the reaction, raise the temperature to 38-45°C, distill out dichloromethane for recovery (recycling), add 1000kg of cold water, and separate 255kg of N-butyryl cysteamine , detected by liquid chromatography, the content was 99.4% (N-butyryl cysteamine standard sample was purchased from SIGMA, USA), and the yield was 98.1%.
Embodiment 3
[0033]Add 500kg of dichloromethane and 154kg of cysteamine into a 2000L enamel reaction kettle, cool down to 0-5°C with frozen brine, slowly add 782kg of oleoyl chloride (over 30%), and drop 200kg of triethylamine at the same time to maintain the temperature Reaction at 0-5°C, when no cysteamine can be detected, stop the reaction, raise the temperature to 38-45°C, slip out the dichloromethane for recovery (recycling), add 1000kg of cold water, and separate 635kg of N-oleoyl cysteamine , detected by liquid chromatography, the content was 98.2% (N-oleoyl cysteamine standard sample was purchased from SIGMA, USA), and the yield was 96.3%.
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