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Method for inhibiting grease from generating in alkaline tower

An alkaline washing tower and butter technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of easy blocking of the alkaline washing tower, inconvenient operation, and poor butter inhibition effect.

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, the butter suppression effect is not good, which leads to the problem that the alkali washing tower is easy to block and the operation is inconvenient, and a new method for inhibiting the formation of butter in the alkali washing tower is provided

Method used

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  • Method for inhibiting grease from generating in alkaline tower

Examples

Experimental program
Comparison scheme
Effect test

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%. The temperature of alkali solution in the alkali washing tower is 45°C, the concentration of alkali solution (NaOH) is 10%, and the inhibitor 2-aminopyridine is continuously injected into the alkali solution circulation line with a piston pump, and the injection concentration is 50ppm. After 30 days of operation of the device, there is no blockage The tower phenomenon occurs. Adopt the testing method of GB8978-1996 to test the COD value in the lye to be 897 mg / liter, and the results are shown in Table 1.

Embodiment 2～9

[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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Abstract

The invention relates to a method for inhibiting grease from generating in an alkaline tower, mainly solving the problem of easiness in tower blockage and inconvenient operation of the alkaline tower caused by bad grease inhibition effect in the prior art. The method disclosed herein is characterized by continuously on-line injecting an inhibitor, wherein the inhibitor is selected from at least one of the following structural formula, R represents at least one of alkyl or aryl containing 0-15 carbon atoms. The method disclosed herein well solves the problem and can be applied in the alkaline towers for petroleum ethene, preparing ethene from methanol, preparing propylene from methanol, vinyl acetate, dichloroethylene, epoxypropane, etc.

Description

technical field [0001] The invention relates to a method for inhibiting the production of butter in an alkali washing tower. Background technique [0002] In the industrial production process of petroleum ethylene, ethanol dehydration to ethylene (ETO), methanol to olefins (MTO), methanol to propylene (MTP), vinyl acetate, ethylene dichloride, propylene oxide, etc., in order to obtain the target product that meets the purity requirements , or the unreacted material is recycled, and the stream flowing out of the reactor needs to go through a series of purification, separation and purification processes. In these industrial production processes, it is inevitable to generate some acidic impurities such as CO 2 Wait. If these acidic substances are not removed, they will cause adverse effects in subsequent production. Therefore, it is necessary to carry out alkali washing on the reaction tail gas to remove the acidic substance CO 2 Etc., this just must use the alkali washing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/79B01D53/62
Inventor 李亚男李玉宁金照生徐菁
Owner CHINA PETROLEUM & CHEM CORP