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High-temperature corrosion inhibitor for oilfield exploitation and petroleum refining process and preparation method of high-temperature corrosion inhibitor

A high-temperature corrosion inhibitor, petroleum refining technology, applied in the petroleum industry, chemical instruments and methods, earth-moving drilling, etc., can solve the problems of affecting the production and operating environment, irritating odor, limited corrosion inhibition effect, etc. To achieve the effect of safe and reliable production and use operation process, good corrosion inhibition effect and good corrosion inhibition effect

Active Publication Date: 2017-02-22
徐文忠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the corrosion protection of high-temperature parts, there are not many types of high-temperature corrosion inhibitors provided in the prior art. The most important high-temperature corrosion inhibitor is the high-temperature corrosion inhibitor GX-195 produced by Shanghai Guitong New Material Technology Co., Ltd. The shortcomings of corrosion inhibitors are also more obvious
First of all, ethylenediamine, a volatile organic amine, is used in the production process, which has a pungent odor, affects the production and operating environment, has a large safety hazard, and is not friendly to the environment.
Secondly, the corrosion inhibition effect is limited and needs to be further improved

Method used

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  • High-temperature corrosion inhibitor for oilfield exploitation and petroleum refining process and preparation method of high-temperature corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, this example provides a high-temperature corrosion inhibitor used in oil field exploitation and petroleum refining processes. The specific preparation method is as follows: Weigh 6 kg of ricinoleic acid and 2 kg of stearic acid and mix them uniformly to obtain intermediate one. Add 1.44kg of N-methyldiethanol to the intermediate one, raise the temperature to 105°C, keep stirring at 105-115°C for 3h to obtain intermediate two. The intermediate product 2 was cooled down to 85° C., and then 480 g of triethanolamine was added to the intermediate product 2, and stirred and kept at 105° C. for 1 hour to obtain the intermediate product 3 . The intermediate product 3 was cooled down to 100°C, and then 2.8kg of industrial white oil was added, kept stirring continuously and dropped to room temperature to obtain the high temperature corrosion inhibitor of this example.

Embodiment 2

[0019] This example provides a high-temperature corrosion inhibitor used in oil field exploitation and petroleum refining processes. The specific preparation method is as follows: Weigh 7 kg of ricinoleic acid and 3 kg of stearic acid and mix them uniformly to obtain intermediate one. 1.9 kg of N-methyldiethanol was added to the intermediate one, the temperature was raised to 110°C, and kept at 105-115°C with stirring and heat preservation for 3.5h to obtain intermediate two. The intermediate product 2 was cooled down to 80° C., and then 700 g of triethanolamine was added to the intermediate product 2, and stirred and kept at 110° C. for 1.5 h to obtain the intermediate product 3 . The intermediate product 3 was cooled down to 95°C, then 3.8 kg of industrial white oil was added, and the high temperature corrosion inhibitor of this example was obtained by keeping stirring continuously and dropping to room temperature.

Embodiment 3

[0021] This example provides a high-temperature corrosion inhibitor used in oil field exploitation and petroleum refining processes. The specific preparation method is as follows: Weigh 8 kg of ricinoleic acid and 4 kg of stearic acid and mix them uniformly to obtain intermediate one. 2.4 kg of N-methyldiethanol was added to the intermediate one, the temperature was raised to 115° C., and kept at 105-115° C. for 3 h with stirring to obtain intermediate two. The intermediate product 2 was cooled to 80° C., and then 960 g of triethanolamine was added to the intermediate product 2, and stirred and kept at 115° C. for 2 hours to obtain the intermediate product 3 . The intermediate product 3 was cooled down to 90°C, and then 4.8 kg of industrial white oil was added, and the high-temperature corrosion inhibitor of this example was obtained by keeping stirring continuously and dropping to room temperature.

[0022] The corrosion inhibition rate of the high-temperature corrosion inhib...

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Abstract

The invention belongs to the technical field of petrochemical equipment and particularly provides a high-temperature corrosion inhibitor for oilfield exploitation and a petroleum refining process. The high-temperature corrosion inhibitor is prepared from raw materials in parts by weight as follows: a raw material group A: 6-8 parts of ricinolic acid and 2-4 parts of stearic acid; a raw material group B: N-methyldiethanolamine, triethanolamine and industrial white oil, wherein the weight of N-methyldiethanolamine is 0.18-0.2 times that of the raw material group A, the weight of triethanolamine is 0.06-0.08 times that of the raw material group A, and the weight of the industrial white oil is 0.35-0.4 times that of the raw material group A. The high-temperature corrosion inhibitor has the corrosion inhibition rate of about 97% and has the advantages of being good in corrosion inhibiting effect, non-irritant, safe, reliable, safe and stable in the production use operation process, environment-friendly and the like. According to the preparation method, performance of the raw materials is comprehensively considered, and the high-temperature corrosion inhibitor with more stable performance and more excellent corrosion inhibition effects can be obtained.

Description

technical field [0001] The invention belongs to the technical field of petrochemical equipment, and in particular relates to a high-temperature corrosion inhibitor used in oilfield exploitation and petroleum refining processes and a preparation method thereof. Background technique [0002] In the petrochemical production process, a variety of machinery and equipment are often used. Corrosion protection of machinery and equipment is an important task, which is related to the service life of the equipment and safe production. Especially for heating furnace tubes, pipelines, distillation tower trays and side lines, tower bottom pipelines and other parts where the temperature exceeds 270 ° C, as well as high-temperature parts in oil drilling, more corrosion protection is required. The corrosion of the above parts is mainly caused by the corrosion of petroleum acid to the parts under high temperature conditions, and the most important one is the corrosion of naphthenic acid. Mo...

Claims

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Application Information

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IPC IPC(8): C10G75/02C09K8/54
CPCC09K8/54C10G75/02
Inventor 徐文忠
Owner 徐文忠
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