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Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof

A butter inhibitor, alkali washing tower technology, applied in chemical instruments and methods, hydrocarbon purification/separation, hydrocarbons and other directions, can solve the problems of clogging the tray, low butter inhibitory effect, etc., to achieve uniform and stable state, inhibit Aldol condensation reaction, good water solubility

Inactive Publication Date: 2016-08-24
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem of butter generation and blockage of the tray in the alkali scrubbing tower of the MTO unit and the low inhibitory effect of butter inhibitors in the prior art on the butter generated in the alkali scrubbing tower of the MTO unit

Method used

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  • Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof
  • Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof
  • Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 15

[0049] The butter inhibitor in Example 1 is applied to the alkali washing tower of the MTO simulation device, the reaction raw material is methanol, the yield of ethylene and propylene is 78%, the concentration of sodium hydroxide in the alkali washing tower is 8%, and the inhibitor is added to the In the circulating lye, the filling amount is 100 μg / g relative to the reaction gas volume, and the device is operated for 20 hours to detect the amount of butter in the lye, and the amount of butter is reduced by 80% compared with the blank experiment.

Embodiment 16

[0051] The butter inhibitor in Example 7 is applied to the alkali washing tower of the MTO simulation device, the reaction raw material is methanol, the yield of ethylene and propylene is 78%, the concentration of sodium hydroxide in the alkali washing tower is 8%, and the inhibitor is added to the In the circulating lye, the filling amount is 100 μg / g relative to the reaction gas volume, and the device is operated for 20 hours to detect the amount of butter in the lye, and the amount of butter is reduced by 76% compared with the blank experiment.

Embodiment 17

[0053] The butter inhibitor in Example 12 is applied to the alkali washing tower of the MTO simulation device, the reaction raw material is methanol, the yield of ethylene and propylene is 78%, the concentration of sodium hydroxide in the alkali washing tower is 8%, and the inhibitor is added to the In the circulating lye, the injection amount is 100 μg / g relative to the amount of cracked gas, and the device is operated for 20 hours to detect the amount of butter in the lye, and the amount of butter is reduced by 65% ​​compared with the blank experiment.

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Abstract

The invention discloses a butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and a preparation method thereof, belonging to the field of petrochemical industry. The butter inhibitor is characterized by comprising (a) 20-50 wt% of polymerization inhibitor, (B) 5-20 wt% of dispersing agent, (C) 2-10 wt% of antioxidant and (D) 20-73 wt% of solvent. The preparation method comprises the following steps: sequentially adding the polymerization inhibitor, dispersing agent, antioxidant and solvent into a container according to percentage by weight under ordinary pressure, and stirring for 20-60 minutes to obtain the butter inhibitor for MTO device alkaline washing towers. Various components of the inhibitor have favorable water solubility, so that the inhibitor prepared according to the proportion has uniform and stable state and reliable performance. Besides, the inhibitor has the advantages of accessible raw materials and simple production process, and is convenient to use.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a butter inhibitor used in an alkali washing tower of an MTO device. Background technique [0002] During the methanol-to-olefins (MTO) reaction, some CO is inevitably produced 2 , CO in the reaction gas 2 If it is not removed, it will bring many hazards to cryogenic separation and rectification, such as causing corrosion of equipment and pipelines. During cryogenic separation, CO 2 Under low temperature conditions, dry ice is formed to block equipment and pipelines, so it is necessary to absorb and remove CO by alkali washing 2 . During the alkaline washing process, a certain amount of oil will be produced, commonly known as butter. After the formation of butter, on the one hand, it affects the normal operation and alkali washing effect of the alkali washing tower. It is manifested by a large amount of butter accumulating and scaling, blocking the distribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/20C07C11/04C07C11/06C07C11/02
Inventor 杨莹刘九林杨金辉李小苗
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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