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Method for suppressing butter generation in mto alkaline washing system

A technology of butter and alkali washing, which is applied in the direction of chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbons, etc., can solve problems such as excessive butter, and achieve the effects of improving inhibition effect, cost saving, and good technical effect

Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The technical problem to be solved by the present invention is the problem that there are many butters in the prior art, and a new method for inhibiting the production of butter in the MTO alkaline cleaning system is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The butter inhibitor is injected into the circulating strong alkali, medium alkali and weak alkali solution of the MTO alkaline cleaning system. The antioxidant in the butter inhibitor is pentaerythritol ester bisphosphite, the mass fraction is 5%, and the polymerization inhibitor is Hydroquinone, the mass fraction is 20%, the solvent is deionized water, the mass fraction is 75%, the filling amount of the butter inhibitor is 100ppm, the device runs for 180 minutes, sampling is analyzed, and the polymer content in the lye is calculated. The polymer content in the liquid reaches 0.25%.

Embodiment 2

[0033] The butter inhibitor is injected into the circulating strong alkali, medium alkali and weak alkali solution of the MTO alkaline cleaning system. The antioxidant in the butter inhibitor is pentaerythritol ester bisphosphite, the mass fraction is 15%, and the polymerization inhibitor is Hydroquinone, the mass fraction is 10%, the solvent is deionized water, the mass fraction is 75%, the filling amount of the butter inhibitor is 100ppm, the device runs for 180 minutes, sampling is analyzed, and the polymer content in the alkali solution is calculated. The polymer content in the liquid reaches 0.31%.

Embodiment 3

[0035] The butter inhibitor is injected into the circulating strong alkali, medium alkali and weak alkali solution of the MTO alkaline cleaning system. The antioxidant in the butter inhibitor is pentaerythritol ester bisphosphite, the mass fraction is 10%, and the polymerization inhibitor is Hydroquinone, the mass fraction is 15%, the solvent is deionized water, the mass fraction is 75%, the filling amount of the butter inhibitor is 100ppm, the device runs for 180 minutes, sampling is analyzed, and the polymer content in the calculation lye, alkali The polymer content in the liquid reaches 0.26%.

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PUM

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Abstract

The invention relates to a method for restraining generation of butter in an MTO (Methanol To Olefins) alkali wash system and mainly aims to solve the problem that the butter is more in the prior art. Through the method, a butter inhibitor is added into an MTO alkali wash tower; the inhibitor comprises an antioxygen, a polymerization inhibitor and a solvent, wherein the mass fractions of the antioxygen, the polymerization inhibitor and the solvent are 5-15%, 10-20% and 65-85% respectively; the antioxygen is SPEP; the polymerization inhibitor is hydroquinone. The technical scheme solves the problem in a better manner and can be used for restraining generation of butter in the MTO alkali wash system.

Description

technical field [0001] The invention relates to a method for inhibiting the production of butter in an MTO alkaline washing system. Background technique [0002] Ethylene and propylene are the core and most basic raw materials of petrochemical industry. With the development of the economy, the market demand for ethylene and propylene has become more and more vigorous, and the consumption has also increased sharply. However, due to the gradual reduction of oil resources and the rising price of crude oil, the production route using traditional petroleum raw materials will face the challenge of tight supply of raw materials. Coal resources are more abundant than petroleum resources, and the price is low. Using coal to produce ethylene and propylene through methanol can greatly reduce the consumption of petroleum resources and save costs. The methanol-to-olefins (MTO) process emerged in this environment, showing huge potential advantages. [0003] The alkali washing system is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/02C07C7/20
Inventor 张晨张帆金满平费轶
Owner CHINA PETROLEUM & CHEM CORP
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