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Preparation method for light hydrocarbon copper sheet corrosion inhibitor

A copper corrosion and inhibitor technology, applied in the preparation of hydrazine, organic chemistry, etc., can solve problems such as danger, copper corrosion performance is not up to standard, copper parts corrosion, etc., to reduce copper corrosion and stabilize light hydrocarbon copper. Corrosive effect

Pending Publication Date: 2017-08-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, after sedimentation and dehydration treatment, the original light hydrocarbons produced by the oilfield joint station often still have more active sulfur components, such as: elemental sulfur, hydrogen sulfide, lower mercaptans, sulfinic acid, sulfonic acid, sulfonate, etc., if If it is not removed, the corrosion performance of the copper sheet of the light hydrocarbon will not meet the standard, and it will further cause the copper parts of the equipment to be corroded by the light hydrocarbon during storage, transfer, and use, causing danger.

Method used

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  • Preparation method for light hydrocarbon copper sheet corrosion inhibitor

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preparation example Construction

[0021] Such as figure 1 As shown, the invention provides a kind of preparation method of light hydrocarbon copper sheet corrosion inhibitor, and this preparation method comprises the following steps:

[0022] Step 1: Add o-nitrochlorobenzene, hydrazine hydrate, and organic co-solvent sequentially into the reaction vessel, and stir evenly; wherein, the mass ratio of o-nitrochlorobenzene:hydrazine hydrate is 1:0.7∼1; the organic co-solvent : The mass ratio of the sum of o-nitrochlorobenzene and hydrazine hydrate is 1:0.2∼0.5;

[0023] Specifically, the purity of the o-nitrochlorobenzene selected for use is not less than 99%, and the purity of the hydrazine hydrate used is not less than 85%; and the organic co-solvent is any one of isopropanol, ethanol, methanol or Several kinds.

[0024] Step 2: Heat the reaction vessel to 115°C, and let the reaction vessel stand for 4∼6 hours;

[0025] Further, on the basis of completing step 1, the reaction vessel is heated. Specifically, ...

Embodiment approach

[0032] As a preferred embodiment of the present invention, the preparation method provided by the present invention also includes:

[0033] Step 6: Use an evaporator to evaporate excess water in the yellow oil obtained in step 5 until the concentration range of the yellow oil satisfies 10∼30%.

[0034] Wherein, excess water may remain in the yellow oil obtained in step 5, so it is preferable to use an evaporator to evaporate the excess water, and it is advisable to satisfy the concentration of light hydrocarbon copper corrosion inhibitor at 10∼30%.

[0035] In order to verify that the inhibitor prepared by the preparation method of the light hydrocarbon copper sheet corrosion inhibitor provided by the present invention is indeed effective, the physical properties of the inhibitor are further analyzed. The light hydrocarbon copper sheet corrosion inhibitor is pale yellow or yellow at room temperature (20∼30°C), and has good miscibility with light hydrocarbons, and can be comple...

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Abstract

The invention relates to the technical field of light hydrocarbon corrosion inhibition, in particular to a preparation method for a light hydrocarbon copper sheet corrosion inhibitor. The inhibitor prepared by the preparation method can effectively lower the corrosiveness of a light hydrocarbon copper sheet, thereby achieving the technical effect of stabilizing the corrosiveness of the light hydrocarbon copper sheet. The preparation method for the light hydrocarbon copper sheet corrosion inhibitor comprises the following steps: adding o-nitrochlorobenzene, hydrazine hydrate and an organic cosolvent into a reaction container in sequence; heating, standing and reacting; performing alkali treatment for precipitating hydrazine hydrate; performing acid treatment for adjusting the PH value; recrystallizing with isopropanol, and performing suction filtration.

Description

technical field [0001] The invention relates to the technical field of light hydrocarbon corrosion inhibition, in particular to a preparation method of a light hydrocarbon copper sheet corrosion inhibitor. Background technique [0002] Light hydrocarbons are light component substances produced by the mixture of carbon and hydrogen, which can be used as chemical raw materials or heating and other purposes. However, after sedimentation and dehydration treatment, the original light hydrocarbons produced by the oilfield joint station often still have more active sulfur components, such as: elemental sulfur, hydrogen sulfide, lower mercaptans, sulfinic acid, sulfonic acid, sulfonate, etc., if If it is not removed, the copper sheet corrosion performance of light hydrocarbons will not meet the standard, and it will further cause light hydrocarbons to corrode copper parts of equipment during storage, transfer, and use, causing danger. Therefore, for those skilled in the art, it is ...

Claims

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Application Information

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IPC IPC(8): C07C241/02C07C243/22C23F11/14
CPCC23F11/148C07C241/02C07C243/22
Inventor 张志振周海刚马波陈健飞张娜李霖王炳升徐英彪唐永安
Owner CHINA PETROLEUM & CHEM CORP
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