Anti-carbon dioxide corrosion inhibitor and preparation method thereof

Abstract

The invention discloses a carbon dioxide corrosion inhibitor which consists of the following components in percentage by mass: 70-80% of clear water, 4-6% of dodecyl dimethyl benzyl ammonium chloride, 8-12% of imidazoline, 4-6% of alkyne-oxy methylamine and 4-6% of dodecyl trimethyl ammonium chloride. The preparation comprises the following steps: weighing the components according to the mass proportion and placing separately for later use; adding 70-80% of the clear water by mass into a mixer and starting stirring for 3-5min; adding the dodecyl dimethyl benzyl ammonium chloride into the mixer and starting stirring for 12-18min; adding the dodecyl trimethyl ammonium chloride into the mixer and starting stirring for 12-18min; adding the imidazoline into the mixer and starting stirring for 12-18min; and adding the alkyne-oxy methylamine into the mixer and the rest clear water, and starting stirring for at least 20min until the drug is uniformly mixed before stopping the stirring. The carbon dioxide corrosion inhibitor disclosed by the invention realizes a good corrosion inhibition effect on the sewage with high content of carbon dioxide in an oilfield, can effectively control the corrosion of sewage at low concentration and effectively saves the drug cost as well as the repair and maintenance cost of the oilfield water treatment equipment; and moreover, the preparation method is simple and fast, the production cost is low and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of oilfield sewage treatment reagents, in particular to an anti-carbon dioxide corrosion inhibitor suitable for corrosion inhibition of oilfield sewage with high carbon dioxide content and a preparation method thereof. Background technique [0002] Weak acid corrosion caused by the presence of carbon dioxide in the process of oilfield sewage treatment is widespread, resulting in serious loss of equipment in the oilfield water treatment process, resulting in a serious reduction in the service life of the equipment, and the shutdown of production and operation caused by oilfield sewage treatment. Equipment maintenance, equipment Maintenance costs increase year by year. However, there is currently no carbon dioxide corrosion inhibitor with good effect on the market, which can be applied to the corrosion inhibition of sewage with high carbon dioxide content in oil fields, and can effectively control the corrosio...

AI Technical Summary

Problems solved by technology

[0002] Weak acid corrosion caused by the presence of carbon dioxide in the process of oilfield sewage treatment is widespread, resulting in serious loss of equipment in the oilfield water treatment process, resulting in a serious reduction in the service life of the equipment, and the shutdown of production and operation caused by oilfield sewage treatment. Equipment maintenance, equipment Maintenance costs increase year by year

However, there is currently no carbon dioxide corrosion inhibitor with good effect on the market, which can be applied to the corrosion inhibition of sewage with high carbon dioxide content in oil fields, and can effectively control the corrosion of sewage at low concentrations.