Method for extracting oxytetracycline from oxytetracycline mother liquor
A technology of oxytetracycline mother and oxytetracycline, which is applied in the field of oxytetracycline production, can solve the problems of large amount of waste water, large amount of waste water, environmental pollution, etc., reduce difficulty and cost, improve adsorption effect, and have good adsorption selectivity Effect
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Embodiment 1
[0019] Oxytetracycline mother liquor is added acid to adjust pH to 2.0, filters to obtain oxytetracycline clarification mother liquor, gets oxytetracycline clarification mother liquor 2000ml, and oxytetracycline concentration is 1016u / ml, takes strong polar macroporous adsorption resin (in the form of Lanxiao LXT-081 resin is an example, LXT-081 resin is a macroporous styrene-based adsorption resin) 60ml column packing, followed by 4% sodium hydroxide, purified water, 4% hydrochloric acid solution and washed to neutrality, and oxytetracycline The clarified mother liquor passes through the macroporous adsorption resin, the adsorption temperature is normal temperature, the flow rate is 10bv / h, and the concentration of the adsorbed oxytetracycline is 278u / ml. The recovery rate is 72.6%. h desorption, and then post-treatment to obtain oxytetracycline and recovery of ethanol, the desorption rate is 99.21%. The total recovery rate of oxytetracycline was 72%.
Embodiment 2
[0021] Get oxytetracycline mother liquor and adjust pH to 4.8, filter, obtain oxytetracycline clarification mother liquor, get oxytetracycline clarification mother liquor 2000ml, oxytetracycline concentration is 1200u / ml, get strong polar macroporous adsorption resin (take Lan Xiao LXT- 081 resin as an example, LXT-081 resin is a macroporous styrene-based adsorption resin,) 60ml column, followed by 4% sodium hydroxide, purified water, 4% hydrochloric acid solution and washed to neutral, clarified oxytetracycline The mother liquor passes through the macroporous adsorption resin, the adsorption temperature is normal temperature, the flow rate is 6bv / h, the concentration of oxytetracycline in the adsorbed water is 322u / ml, and the recovery rate is 68.3%. attached, and then post-treatment to obtain oxytetracycline and recovery of ethanol. The desorption rate was 98.8%. The total recovery rate of oxytetracycline was 67.5%.
Embodiment 3
[0023] Get oxytetracycline to refine mother liquor and adjust pH to 8.0, filter to obtain oxytetracycline clarification mother liquor, get oxytetracycline clarification mother liquor 2000ml, oxytetracycline concentration is 1200u / ml, get strong polar macroporous adsorption resin (using Lanxiao LXT -081 resin as an example, LXT-081 resin is a macroporous styrene-based adsorption resin,) 60ml column, followed by 4% sodium hydroxide, purified water, 4% hydrochloric acid solution and washed to neutral, oxytetracycline The clarified mother liquor passes through the macroporous adsorption resin, the adsorption temperature is normal temperature, the flow rate is 3bv / h, the concentration of oxytetracycline is 374u / ml, and the recovery rate is 63.17%. After the adsorption is saturated, use 95% ethanol at a temperature of 10°C and the flow rate is 5BV / h desorption, and then post-treatment to obtain oxytetracycline and reclaim ethanol. The desorption rate was 96.3%. Total yield of oxyt...
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