Novel high-temperature corrosion inhibitor and preparation method thereof

Abstract

The invention discloses a novel high-temperature corrosion inhibitor. The inhibitor comprises the following components of, by weight, 30%-40% of dimethylformamide, 24%-34% of dimercaptobenzotriazole and 30%-40% of dimethyl sulfoxide. Compared with the prior art, the corrosion inhibition rate of the corrosion inhibitor can reach 90% or above, the corrosion inhibition effect is greatly improved, the effective temperature can be 300 DEG C or above, the environment temperature of a high-temperature section in the normal pressure reduction device is completely matched, so that the normal use of the corrosion inhibitor is ensured, the corrosion problem of naphthenic acid on pipeline equipment is thoroughly solved, the normal operation of equipment is ensured, and the service time of the equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of chemical products, and in particular relates to a novel high-temperature corrosion inhibitor and a preparation method thereof. Background technique [0002] Naphthenic acid is very easy to corrode pipeline equipment in the high temperature section of atmospheric and vacuum equipment. In order to alleviate this situation, the existing method is to use corrosion inhibitors, but the effect of the existing corrosion inhibitors is not very ideal. The main There are two big problems: [0003] 1. The corrosion inhibition rate is low, and the corrosion inhibition rate can only reach 60% to 70%, which cannot really solve the corrosion problem. [0004] 2. The effective temperature of the corrosion inhibitor is low. The existing corrosion inhibitor can only be guaranteed to be effective in the environment of 200 °C, but the temperature of the high temperature section in the atmospheric and vacuum device usually re...

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Problems solved by technology

[0003] 1. The corrosion inhibition rate is low, and the corrosion inhibition rate can only reach 60% to 70%, which cannot really solve the corrosion problem

[0004] 2. The effective temperature of the corrosion inhibitor is low. The existing corrosion inhibitor can only be guaranteed to be effective in the environment of 200 °C, but the temperature of the high temperature section in the atmospheric and vacuum device usually reaches above 250 °C. The use of the corrosion inhibitor results cannot be guaranteed