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High temp corrosion inhibitor and its preparation method and application

A high-temperature corrosion inhibitor and corrosion inhibitor technology, applied in the field of high-temperature corrosion inhibitors, can solve problems such as poor corrosion inhibition effect and unstable performance of high-temperature corrosion inhibitors, and achieve improved activation energy, low cost, and cheap raw materials Easy to get effect

Inactive Publication Date: 2006-11-29
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention aims to solve the disadvantages of unstable performance and poor corrosion inhibition effect of the high-temperature corrosion inhibitor in the prior art, and provides a new type of high-temperature corrosion inhibitor to effectively solve the problems caused by high-temperature parts in the petroleum refining process. Naphthenic acid corrosion and sulfur corrosion, the present invention also provides the preparation method and application of the corrosion inhibitor

Method used

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  • High temp corrosion inhibitor and its preparation method and application
  • High temp corrosion inhibitor and its preparation method and application
  • High temp corrosion inhibitor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Structures and preparation methods of novel compounds A1 and B1.

[0036] 1. The structural formula of novel compound A1 is formula (5), and the structural formula of B1 is formula (6):

[0037]

[0038] 2. Preparation method

[0039] (1) Put 260 grams of isooctyl alcohol and 110 grams of toluene into a 500 ml four-necked flask equipped with a stirrer, a thermometer and a condenser. Start the stirring device and open the condensed water of the condenser at the same time, then add 110 grams of phosphorus pentasulfide, and when the temperature is raised to 120° C., keep the temperature constant for 5 hours.

[0040](2) 160 grams of oleic acid, 90 grams of triethylenetetramine, and 60 grams of xylene were simultaneously added to another 500 ml four-neck flask equipped with a stirrer, a thermometer, a water separator, and a condenser. Heat up to 200°C at 10°C / h, dehydrate and remove solvent, keep the temperature for 8 hours, cool to 100°C, add the reaction product of s...

Embodiment 2

[0042] Structures and preparation methods of novel compounds A2 and B2.

[0043] 1. The structural formula of novel compound A2 is formula (7), and the structural formula of B2 is formula (8):

[0044]

[0045] 2. Preparation method

[0046] (1) Put 150 grams of n-butanol and 70 grams of xylene into a 500ml four-neck flask equipped with a stirrer, a thermometer and a condenser. Start the stirring device and open the condensed water of the condenser at the same time, then add 130 grams of phosphorus pentasulfide, and when the temperature is raised to 160° C., keep the temperature constant for 8 hours.

[0047] (2) 140 grams of stearic acid, 140 grams of diethylenetriamine, and 90 grams of benzene were simultaneously added to another 500 ml four-neck flask equipped with a stirrer, a thermometer, a water separator, and a condenser. Heat up to 240°C at 10°C / h, dehydrate and remove solvent, keep the temperature for 6 hours, cool to 120°C, add the reaction product of step (1), ...

Embodiment 3

[0049] Structures and preparation methods of novel compounds A3 and B3.

[0050] 1. The structural formula of novel compound A3 is formula (9), and the structural formula of B3 is formula (10):

[0051]

[0052] 2. Preparation method

[0053] (1) Put 150 grams of dodecyl alcohol and 90 grams of xylene into a 500 ml four-necked flask equipped with a stirrer, a thermometer and a condenser. Start the stirring device and open the condensed water of the condenser at the same time, then add 150 grams of phosphorus pentasulfide, and when the temperature is raised to 150° C., keep the temperature constant for 6 hours.

[0054] (2) Add 240 grams of dodecenylsuccinic acid, 50 grams of pentaethylenehexamine, and 70 grams of toluene to another 500 ml four-necked flask equipped with a stirrer, a thermometer, a water separator, and a condenser at the same time. Raise the temperature to 220°C at 10°C / h, dehydrate and remove the solvent, keep the temperature constant for 5 hours, cool to...

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Abstract

The invention discloses a manufacture method and application for high temperature inhibitor that is the compound has the structure general expression (1), and R1 is C4-C12 alkyl, R2 is C8-C30 alkyl or alkyl derivative, n is 2-5, A is SH or R10. The invention could effectively solve the naphthenic acid corruption and sulfur corruption generated by high temperature section in petroleum processing.

Description

technical field [0001] The invention belongs to the field of corrosion inhibition of metal materials, in particular to a high-temperature corrosion inhibitor used on the surface of equipment and pipelines with corrosion risk in the petroleum refining process, and a preparation method and application of the corrosion inhibitor. Background technique [0002] In recent years, with the continuous deterioration of the quality of processed crude oil, various degrees of naphthenic acid corrosion and sulfur corrosion have occurred in the distillation units of many refineries, resulting in equipment corrosion and leakage, which seriously affects the normal operation of the units. [0003] Crude oil contains a small amount of acidic oxides, such as fatty acids, naphthenic acids, and phenols. These acidic oxides are collectively referred to as petroleum acids. The content of naphthenic acid usually accounts for about 90% of petroleum acid, so naphthenic acid is the cause of equipment fa...

Claims

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Application Information

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IPC IPC(8): C23F11/10
Inventor 杨莹潘延民
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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