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Ethylene unit alkaline washing tower polymer inhibitor and preparation method and application thereof

A technology for ethylene devices and inhibitors, applied in the fields of hydrocarbons, chemical instruments and methods, organic chemistry, etc.

Active Publication Date: 2013-04-17
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the shortcoming of prior art, and provides a kind of polymer inhibitor of alkali washing tower of ethylene plant, to solve polymer formation and clogging of alkali washing tower of ethylene The problem of trays, the inhibitor provided by the present invention has good effect, good stability, simple production and convenient use

Method used

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  • Ethylene unit alkaline washing tower polymer inhibitor and preparation method and application thereof
  • Ethylene unit alkaline washing tower polymer inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0028] Examples 1-14 are examples of the components, proportioning and preparation of the polymer inhibitor.

[0029] Under normal temperature, normal pressure, and constant stirring, respectively add certain parts by mass of the compounds in Table 1 and Table 2 into deionized water of corresponding parts by mass until each component is completely dissolved, that is, the ethylene device of the present invention is obtained. Alkaline scrubber polymer inhibitor. Among them, the conductivity of deionized water is less than 10μs·cm -1 .

[0030] Table 1 embodiment 1-7 polymer inhibitor component and proportioning (data in the table are all mass fractions)

[0031]

[0032] Table 2 embodiment 8-14 polymer inhibitor component and proportioning (data in the table are all mass fractions)

[0033]

Embodiment 15

[0035] The alkali washing tower polymer inhibitor in the embodiment 2 is applied to the alkali washing tower of the ethylene simulation device, the cracking raw material is naphtha, and the total yield of ethylene, propylene and butadiene in the cracking gas is 43.2%, and in the alkali washing tower The concentration of sodium hydroxide is 8%, and the inhibitor is added to the circulating lye at one time. The filling amount is 50 μg / g relative to the amount of cracked gas. The device runs for 2 hours, and the amount of polymer in the lye is measured. Blank experiments were reduced by 50%.

Embodiment 16

[0037] The alkali-washing tower polymer inhibitor in embodiment 6 is applied to the alkali-washing tower of the ethylene simulation device, and the cracking raw material is naphtha, and the total yield of ethylene, propylene, and butadiene in the cracking gas is 43.2%, and in the alkali-washing tower The concentration of sodium hydroxide is 8%, the inhibitor is added to the circulating lye at one time, the injection amount is 50 μg / g relative to the amount of cracked gas, the device is operated for 2 hours, and the amount of polymer in the lye is measured, the amount of polymer is relative to the blank experiment 56% reduction.

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Abstract

The invention discloses an ethylene unit alkaline washing tower polymer inhibitor and a preparation method and application thereof, which aim to solve the problems of the generation of an ethylene alkaline washing tower polymer and tower tray blockage in the prior art. The inhibitor consists of the following components in percentage by weight: 10 to 30 percent of a component A, 10 to 30 percent of a component B, 2 to 10 percent of a component C and 30 to 78 percent of a component D, wherein the component A is an aldehyde ketone condensation inhibitor; the component B is a water-soluble free radical polymerization inhibitor; the component C is a sulfate water-soluble antioxidant solubilizer; and the component D is a solvent. The ethylene unit alkaline washing tower polymer inhibitor has even and stable state and reliable performance, not only can inhibit aldehyde ketone condensation reaction and unsaturated olefin free radical polymerization reaction, but also can reduce a small amountof oxygen dissolved in an alkali liquor, and simultaneously disperses a small amount of the generated polymer and dissolves the polymer into the alkali liquor to prevent the polymer from blocking thetower tray.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a polymer inhibitor for an alkali washing tower of an ethylene plant, a preparation method and application thereof. Background technique [0002] Hydrocarbons such as ethane, propane, naphtha, gasoline, etc. are pyrolyzed in the cracking furnace to produce small molecular hydrocarbons such as ethylene, propylene, butadiene, and a large amount of CO will be produced. 2 、H 2 S and other acidic gases, these acidic impurities in the cracked gas 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 forms to block equipment and pipelines, so alkali or amine must be used in the alkali washing tower to absorb and remove these acidic impurities. During the alkali washing process, while the acid gas is removed, some oxygen-containing compounds ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C7/20
Inventor 杨莹杨金辉潘延民刘志龙刘九林田淑梅
Owner CHINA PETROCHEMICAL CORP
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