Recovery device and recovery method for ethyl acetate in beta-carotene extraction wastewater
A carotene and ethyl acetate technology, which is applied in the separation/purification of carboxylate, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of low concentration, difficult recovery, and low polarity of ethyl acetate. Achieve the effects of strong adsorption capacity, easy desorption, and large specific area
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Embodiment 1
[0029] A recovery device for ethyl acetate in waste water extracted by β-carotene, comprising an adsorption column 1, a condenser 2 and a layered tank 3, the inlet of the adsorption column 1 is connected to the waste water inlet pipe, nitrogen gas inlet pipe, The steam inlet pipe, the organic solvent inlet pipe and the washing water inlet pipe are connected, the outlet of the adsorption column 1 is respectively connected with the desorption outlet pipe, the waste water outlet pipe, and the gas outlet pipe through the main outlet pipe, and the other end of the desorption outlet pipe is connected with the condenser 2 inlet Connected, the outlet of the condenser 2 is connected with the inlet of the layered tank 3, and each connecting pipe is provided with a valve.
[0030] The working principle of this recovery device is: washing water, organic solvent, steam, N 2 And waste water can be passed into the adsorption column according to the recovery method, wherein the washing water,...
Embodiment 2
[0032] A kind of β-carotene extraction wastewater, the COD value is 3.12×10 4 mg / L, the waste water is detected by gas chromatography, the results are as follows figure 2 Shown, ethyl acetate content is 0.621% (v / v) in the waste water.
[0033] Use the recovery device of embodiment 1 to reclaim the ethyl acetate of waste water, step is as follows:
[0034] S1. Take 4.07L of macroporous adsorption resin H-01 and wet it with water, stir it evenly and then pack it into a column. The specifications of the adsorption column are H=0.12m, Φ=0.36m;
[0035] S2. Pretreat the adsorption column:
[0036] (1) Wash the resin with 8.14L of water;
[0037] (2) Push out the water with 8.14L ethanol and soak for 24 hours;
[0038] (3) Evacuate the ethanol, completely replace the solvent with water, and wash until the adsorption column has no ethanol smell;
[0039] S3. The β-carotene extraction wastewater is adsorbed on the column, the flow rate is controlled at 0.5BV / h, and the total co...
Embodiment 3
[0044] A kind of β-carotene extraction wastewater, the COD value is 3.12×10 4 mg / L, ethyl acetate content 0.621% (v / v). Use the recovery device of embodiment 1 to reclaim the ethyl acetate of waste water, step is as follows:
[0045] S1. Continue to use the macroporous adsorption resin H-01 analyzed in Example 1, wet it with water, and then stir evenly to pack it into a column. The specifications of the adsorption column are H=0.12m, Φ=0.36m;
[0046] S2. Pretreat the adsorption column:
[0047] (1) Wash the resin with 8.14L of water;
[0048] (2) Push out the water with 8.14L ethanol and soak for 24 hours;
[0049] (3) Evacuate the ethanol, completely replace the solvent with water, and wash until the adsorption column has no ethanol smell;
[0050]S3. The β-carotene extraction wastewater is adsorbed on the column, the control flow rate is 1BV / h, and the total column volume is 20BV. Take the instantaneous outflow sample when the column volume is 10BV, the column volume is...
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