Method for inhibiting grease in alkaline washing towers
A technology of alkali washing tower and butter, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbons, etc., and can solve problems such as poor inhibition effect of butter, easy blockage of alkali washing tower, inconvenient operation, etc.
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Embodiment 1
[0012] Apply the inhibitor to the alkali washing tower of the ETO plant, wherein the molar composition of the materials entering the alkali washing tower is: ethylene 49.1%, water 50.25%, acetaldehyde 0.05%, ether 0.01%, C 3 + Hydrocarbon 0.58%, CO 2 0.01%. Alkali washing tower lye temperature is 45°C, lye (NaOH) concentration is 10%, the inhibitor N-aminopiperidine is continuously injected into the lye circulation line using a piston pump, and the injection concentration is 65ppm. After 30 days of operation of the device, no Tower blocking occurs. Adopt the testing method of GB8978-1996 to test that the COD value in the lye is 991 mg / liter, and the results are shown in Table 1.
Embodiment 2~13
[0014] According to each step of [Example 1], only the inhibitors added and their concentrations are different. The specific results are shown in Table 1.
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