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Antioxidant corrosion inhibitor

An anti-oxidant corrosion inhibitor and catalyst technology, applied in the field of anti-oxidant corrosion inhibitors, can solve the problems of accelerated local pitting, high cost, large amount of anti-oxidant corrosion inhibitor, etc., and achieves corrosion prevention, good compatibility, excellent The effect of high temperature antioxidant properties

Active Publication Date: 2019-07-16
上海贵通新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional anti-oxidant corrosion inhibitors are used in a large amount and cost high, and when the amount is lower than the critical concentration, local pitting corrosion will be accelerated

Method used

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Examples

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example 1

[0020] Antioxidant corrosion inhibitor is prepared by the following method:

[0021] Put dicyandiamine, activated alumina, sulfonic acid, and zeolite into the reaction kettle, stir, heat up to 120°C, add dichloropropane at a rate of 10mL / min, stir, heat up to 140°C, keep warm for 2 hours, and heat up to 180°C, keep warm for 1h, heat up to 200°C, then pass inert gas to 1MPa, keep warm and pressurized for 1h, discharge inert gas, return the pressure to atmospheric pressure, cool to below 50°C, and obtain intermediates, among which dicyandi The molar ratio of amine to dichloropropane is 1:1.2;

[0022] Gelatinize starch at 70°C, cool to room temperature, add acrylamide, continuously add ammonium sulfate-sodium bisulfite during stirring, carry out redox reaction, cool, add ethanol for precipitation, take the precipitate, and dry it in vacuum at 50°C to obtain powder body, redissolve the powder in acetone, extract, take the extract, and dry it in vacuum at 50°C to obtain a copolym...

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PUM

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Abstract

The invention discloses an antioxidant corrosion inhibitor. The antioxidant corrosion inhibitor is prepared through the steps of charging dicyanodiamine, a catalyst and zeolite into a reaction kettleand adding propylene dichloride to obtain an intermediate body; pasting starch, adding acrylamide, and continuously adding an initiating agent in the mixing process to obtain a copolymer; and chargingthe intermediate body, the copolymer, benzotriazole, sulfide and silicate into the reaction kettle in sequence to be fixed and then cooled to the indoor temperature to obtain the antioxidant corrosion inhibitor. Through the antioxidant corrosion inhibitor, a compact and firm protective film can be formed on the surfaces of oil gas equipment and a gathering transport pipeline in a moist high-temperature environment, and corrosion of a sewage medium to the oil gas equipment and the gathering transport pipeline is effectively prevented. The antioxidant corrosion inhibitor has the excellent high-temperature antioxidant performance.

Description

technical field [0001] The invention relates to the technical field of petroleum processing. More specifically, the present invention relates to an anti-oxidation corrosion inhibitor. Background technique [0002] After the oilfield enters the high water cut period, the dissolved oxygen contained in the oilfield sewage will often form electrochemical corrosion or microbial corrosion on oil and gas equipment and pipelines, resulting in continuous corrosion and perforation in the sewage system. Usually very low concentration of oxygen (less than 1mg / L) can cause extremely serious corrosion. If HCO is present in the sewage medium 3 - or CO 2 Oxygen will increase their corrosiveness sharply, causing corrosion of oil and gas equipment and pipelines, and even corrosion and fracture of oil pipes, shortening the service life of oil and gas wells and causing huge economic losses. [0003] At present, there are many measures for oxygen corrosion of oil and gas equipment and pipel...

Claims

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Application Information

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IPC IPC(8): C23F11/08
CPCC23F11/08
Inventor 徐文忠
Owner 上海贵通新材料科技有限公司
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