High temperature corrosion inhibitor for oil refining device

A high-temperature corrosion inhibitor and oil refining device technology, which is used in the petroleum industry, hydrocarbon oil treatment, and treatment equipment corrosion/fouling inhibition. , Overcome the effect of easy falling off

Active Publication Date: 2012-07-11
浙江杭化科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is to overcome the disadvantages that the high-temperature corrosion inhib

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of nitrogen-containing sulfur-containing polymer—put 85 grams of hexadecyl succinic anhydride and 100 grams of xylene into a 500-ml four-necked flask equipped with a stirrer, thermometer, water separator and condenser. Turn on the condensed water while disassembling the stirring device, then slowly add 30 g of hydroxybenzothiazole, heat up until the xylene starts to reflux, and react for 1 hour. Then 60 g of triethylenetetramine was added dropwise, and after reacting for 1 hour, the temperature was raised to 220° C., dehydrated, solvent removed, and cooled to 100° C. after constant temperature for 5 hours. Then add 200 grams of xylene and 35 grams of hexadecyl succinic anhydride, heat up until the xylene begins to reflux, react for 2 hours, and cool to obtain a xylene solution of nitrogen-containing and sulfur-containing polymers.

[0029] Preparation of high-temperature corrosion inhibitor—add 70 grams of the nitrogen-containing and sulfur-containing polymer ...

Embodiment 2

[0031] Preparation of nitrogen-containing sulfur-containing polymer——Put 98 grams of tetradecyl succinic anhydride and 100 grams of xylene into a 500-ml four-necked flask equipped with a stirrer, thermometer, water separator and condenser. Turn on the condensed water while using the stirring device, then slowly add 18 grams of hydroxybenzothiazole, heat up until the xylene starts to reflux, and react for 2 hours. Then, 72 g of tetraethylenepentamine was added dropwise, and after reacting for 1 hour, the temperature was raised to 220° C., dehydration and solvent removal were performed, and the temperature was kept constant for 5 hours, and then cooled to 100° C. Then add 200 grams of xylene and 22 grams of tetradecyl succinic anhydride, heat up to xylene and start to reflux, react for 2 hours, and cool to obtain a xylene solution of nitrogen-containing and sulfur-containing polymers.

[0032] Preparation of high-temperature corrosion inhibitor——Add 58 grams of the nitrogen-cont...

Embodiment 3

[0034] Preparation of nitrogen-containing sulfur-containing polymer——Put 105 grams of cetyl succinic acid and 100 grams of xylene into a 500-ml four-necked flask equipped with a stirrer, a thermometer, a water separator and a condenser. Turn on the condensed water while using the stirring device, then slowly add 10 g of aminobenzothiazole, heat up until the xylene starts to reflux, and react for 3 hours. Then 80 g of tetraethylenepentamine was added dropwise, and after reacting for 1 hour, the temperature was raised to 220° C., dehydrated, solvent removed, and cooled to 100° C. after constant temperature for 5 hours. Then add 200 grams of xylene and 15 grams of hexadecyl succinic acid, heat up until the xylene begins to reflux, react for 2 hours, and cool to obtain a xylene solution of nitrogen-containing and sulfur-containing polymers.

[0035] Preparation of high-temperature corrosion inhibitor——Add 46 grams of the nitrogen-containing and sulfur-containing polymer solution p...

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Abstract

The invention relates to a high temperature corrosion inhibitor for an oil refining device. The high temperature corrosion inhibitor needs to overcome the shortcoming that an adsorption film is easy to fall off, solves the problem that the traditional high temperature corrosion inhibitor is lower in the using temperature, leads the applicable temperature of a product to be higher and has better effect. The high temperature corrosion inhibitor is prepared by adopting the following steps of: (1) firstly dissolving a part of alkyl diacid or alkyl dianhydride in an aromatic hydrocarbon solvent, stirring and adding a thiazole compound, rising temperature, then dropwise adding polyethylene polyamine, rising temperature, keep temperature constant after dewatering and removing the aromatic hydrocarbon solvent, adding the aromatic hydrocarbon solvent and residual alkyl diacid or alkyl dianhydride again, and reacting to obtain a nitrogenous and sulfur containing polymer solution; and (2) compounding and uniformly stirring 20-40 parts by weight of nitrogenous and sulfur containing polymer solution (based on 20-40 parts by weight of nitrogenous and sulfur containing polymer) prepared in the step (1), 10-30 parts by weight of (phosphite) phosphate ester compound, 0-5 parts by weight of alkenyl succinimide compound and 70-25 parts by weight of aromatic hydrocarbon solvent.

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 a temperature higher than 200 ° C, especially higher than 320 ° C, which may cause corrosion in the process of petroleum refining, and the Preparation method of corrosion inhibitor. Background technique [0002] In recent years, with the exploitation and utilization of high-acid and high-sulfur crude oil in my country, the corrosion of carbon steel equipment in high-temperature parts of refineries that process high-acid value crude oil is more and more serious. The corrosion of equipment in the high temperature part of the refinery is mainly caused by naphthenic acid corrosion. Crude oil with an acid value above 0.5 mgKOH / g will cause strong corrosion of metal materials at high temperatures. At present, the acid value of crude oil in some oil fields has reached 6-10 mg...

Claims

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Application Information

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IPC IPC(8): C10G75/02
Inventor 李有金林向阳沈勤梅
Owner 浙江杭化科技股份有限公司
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