Resource utilization method of ethyl acetate production wastewater
A technology for the production of ethyl acetate and waste water, which is applied in the separation/purification of carboxylic acid esters, chemical instruments and methods, and the separation/purification of carboxylic acid compounds, and can solve problems such as failure to effectively recover
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Embodiment 1
[0036] The rectification uses a packed tower: the temperature at the top of the rectification tower is 73-80°C, the temperature at the bottom of the tower is 110-135°C, the number of trays is 10, and 450-type ceramic corrugated plate is used as high-efficiency packing. The adsorption system adopts a fixed bed, the adsorbent is weakly basic resin D331, the particle size is 8-50 mesh, and the loading capacity is 100kg; the acidifying agent is 30% concentrated hydrochloric acid; the salting-out agent is sodium chloride; The catalyst is CeO 2 / SiO 2 , CeO 2 The loading amount of the catalyst is 15%, the particle size of the catalyst is 0.022-0.18mm, the catalyst dosage is 40wt% of the crystal mass, and the dry oxygen cracking temperature is 400°C.
[0037] The COD value of ethyl acetate production wastewater is 50000mgO 2 / L, wherein the content of acetic acid is 0.8wt%, and the total content of ethyl acetate and ethanol is 3.05wt%.
[0038] Such as figure 1 Shown, ethyl acet...
Embodiment 2
[0040] On the basis of Example 1, the following adjustments are made: the adsorbent loaded in the adsorption system is activated carbon, the particle size is 8 to 50 mesh, and the loading capacity is 100kg; the acidulant adopts the concentrated sulfuric acid with a mass fraction of 98%; the salting-out agent adopts Potassium sulfate; the catalyst used in dry oxygen cracking is MnO 2 / Al 2 o 3 , MnO 2 The loading capacity is 15%, the particle size of the catalyst is 0.012-0.2mm, the catalyst consumption is 50wt% of the crystal mass, and the oxygen cracking temperature is 500°C.
[0041] The COD value of ethyl acetate production wastewater is 49000mgO 2 / L, wherein the content of acetic acid is 0.76wt%, and the total content of ethyl acetate and ethanol is 3.12wt%.
[0042] The ethyl acetate production wastewater is transported to the rectification tower (the top temperature of the rectification tower is 73-80°C, the temperature of the tower bottom is 110-135°C, the number o...
Embodiment 3
[0044] On the basis of Example 1, the following adjustments are made: the adsorbent loaded in the adsorption system is a SLCMS-260 type carbon molecular sieve, the particle size is 8 to 50 mesh, and the loading amount is 100kg; the acidulant adopts a mass fraction of 98% concentrated sulfuric acid; The salting-out agent adopts sodium sulfate; the catalyst used in dry oxygen cracking is V 2 o 5 -M O o 3 / TiO 2 , V 2 o 5 1% loading, M O o 3 The loading capacity is 9%, the particle size of the catalyst is 0.011-0.2mm, the catalyst consumption is 100wt% of the crystal mass, and the oxygen cracking temperature is 600°C.
[0045] The COD value of ethyl acetate production wastewater is 50550mgO 2 / L, wherein the content of acetic acid is 0.82wt%, and the total content of ethyl acetate and ethanol is 3.11wt%.
[0046] Transport the ethyl acetate production wastewater to the packed rectification tower (the top temperature of the rectification tower is 73-80°C, the temperature ...
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