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High temperature corrosion inhibitor

A high-temperature corrosion inhibitor, polyethylene polyamine technology, applied in the field of imidazoline-containing corrosion inhibitors, can solve problems such as unsatisfactory effects and unsatisfactory effects, and achieve the effect of protecting materials and reducing corrosion

Active Publication Date: 2006-04-12
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect is not ideal after being used in the case of high acid value and sulfur content
However, the content of iron ions in the vacuum distillate oil is relatively high, usually above 6ppm, which cannot meet the requirements of the lubricating oil hydrogenation unit for the iron ion content in the raw oil to be less than 3ppm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Composition: The high-temperature corrosion inhibitor A of the present invention is compounded by tetraethylenepentamine 60%, N-phenyldiethanolamine 20%, straight-chain imidazoline amide 5%, and phosphoric acid monoester 15%.

[0019] On the high-temperature corrosion simulation rotating bench in the laboratory, the Q235 standard test piece (about 2800mm 2 ) in different media at different temperatures, at a speed of 500 r / min, run at a constant temperature for 48 hours, then clean the test piece, weigh it, and measure the corrosion rate. The results are shown in Table 1.

[0020] Medium condition

[0021] On the high-temperature corrosion simulation rotary platform, different concentrations of high-temperature corrosion inhibitor A were added to different media with different acid values ​​to measure the corrosion rate, and the experimental conditions were the same as before.

[0022] Where: corrosion inhibition rate η = (V 0 -V 1 ) / V 0

[0023] V 0 is t...

Embodiment 2

[0028] Composition: The high-temperature corrosion inhibitor B of the present invention is composed of 40% of triethylenetetramine, 25% of N-phenyldiethanolamine, 10% of imidazoline amide with aromatic ring, and 25% of phosphoric acid diester.

[0029] On the high-temperature corrosion simulation rotating bench in the laboratory, the Q235 standard test piece (about 2800mm 2 ) in different media at different temperatures, at a speed of 500 r / min, run at a constant temperature for 48 hours, then clean the test piece, weigh it, and measure the corrosion rate. The results are shown in Table 3.

[0030] Medium condition

[0031] On the high-temperature corrosion simulation rotary bench, different concentrations of high-temperature corrosion inhibitor B were added to different acid values ​​and different media to measure the corrosion rate. The experimental conditions were the same as before. The results are shown in Table 4.

[0032]

[0033] It can be seen from...

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PUM

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Abstract

A high-temp corrosion inhibitor for the metallic apparatus in oil refining system is prepared from polyvinyl polyamine (40-60 Wt%), N-phenyl di-ethanolamine (10-25), amidoimidazoline (1-10) and phosphate (20-35). Its advantages are oil soluble, and high adsorptivity and filming speed.

Description

technical field [0001] The invention relates to a high-temperature corrosion inhibitor for metal anticorrosion, in particular to a corrosion inhibitor containing imidazoline. Background technique [0002] my country's acid-containing crude oil is mainly distributed in Xinjiang, Liaohe, Shengli and other oil fields, and the annual output of acid-containing crude oil accounts for about 40% of the national crude oil production. In recent years, the acid value of crude oil has been continuously increasing, and the corrosion of naphthenic acid has been quite serious, threatening the safe and stable production of oil refineries. At present, naphthenic acid corrosion has involved 29 sets of refinery units, causing frequent planned shutdowns and reduced crude oil processing capacity. The corrosion of atmospheric and vacuum refining units is becoming more and more serious, especially in the high temperature heavy oil parts, corrosion and perforation often occur, which seriously affe...

Claims

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Application Information

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IPC IPC(8): C23F11/10
Inventor 任世科张明军柳玉海孙瑞光张振杰李建刚
Owner BC P INC CHINA NAT PETROLEUM CORP
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