Preparation method of attractant feed additive for suckling pigs
A feed additive and food-inducing technology, which is applied in the field of preparation of suckling pig food-inducing feed additives, can solve problems such as unfavorable human health, susceptibility to diseases, and the development of pig breeding industry
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Embodiment 1
[0031] Described hydrophilic initiator comprises the following steps to make:
[0032] Step S21, adding polyethylene glycol monomethyl ether and succinic anhydride to 1,2-dichloroethane, stirring at a constant speed for 15min at room temperature, then adding 4-dimethylaminopyridine, continuing to stir and react for 15min, after the reaction is completed The temperature was raised to 65°C, and the reaction was kept for 24 hours. After that, the 1,2-dichloroethane was distilled off under reduced pressure, and saturated aqueous sodium carbonate solution was added. The temperature was cooled to room temperature and stirred at a constant speed and reacted for 1 hour. After the reaction was completed, suction filtration and extraction with ethyl acetate three times , stand for liquid separation, adjust the pH of the aqueous layer with 10% dilute hydrochloric acid by mass until pH=2, and then extract three times with dichloromethane, take the organic phase, and distill under reduced p...
Embodiment 2
[0035] Described hydrophilic initiator comprises the following steps to make:
[0036]Step S21, adding polyethylene glycol monomethyl ether and succinic anhydride to 1,2-dichloroethane, stirring at a constant speed for 15min at room temperature, then adding 4-dimethylaminopyridine, continuing to stir and react for 15min, after the reaction is completed The temperature was raised to 65°C, and the reaction was kept for 24 hours. After that, the 1,2-dichloroethane was distilled off under reduced pressure, and saturated aqueous sodium carbonate solution was added. The temperature was cooled to room temperature and stirred at a constant speed and reacted for 1 hour. After the reaction was completed, suction filtration and extraction with ethyl acetate three times , stand for liquid separation, adjust the pH of the aqueous layer with 10% dilute hydrochloric acid by mass until pH=2, and then extract three times with dichloromethane, take the organic phase, and distill under reduced pr...
Embodiment 3
[0039] Described hydrophilic initiator comprises the following steps to make:
[0040] Step S21, adding polyethylene glycol monomethyl ether and succinic anhydride to 1,2-dichloroethane, stirring at a constant speed for 15min at room temperature, then adding 4-dimethylaminopyridine, continuing to stir and react for 15min, after the reaction is completed The temperature was raised to 65°C, and the reaction was kept for 24 hours. After that, the 1,2-dichloroethane was distilled off under reduced pressure, and saturated aqueous sodium carbonate solution was added. The temperature was cooled to room temperature and stirred at a constant speed and reacted for 1 hour. After the reaction was completed, suction filtration and extraction with ethyl acetate three times , stand for liquid separation, adjust the pH of the aqueous layer with 10% dilute hydrochloric acid by mass until pH=2, and then extract three times with dichloromethane, take the organic phase, and distill under reduced p...
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