Preparation method and preparation system of special corrosion inhibitor for metal equipment

A technology for preparing systems and corrosion inhibitors, applied in the field of corrosion inhibitors, can solve problems such as clogging, achieve high corrosion inhibition rate, avoid slow filtration speed, and good corrosion inhibition performance

Pending Publication Date: 2020-12-08
武汉思越化学技术有限公司
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[0005] The invention provides a method for preparing a special corrosion inhibitor for metal equipment and its preparation system, wh

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  • Preparation method and preparation system of special corrosion inhibitor for metal equipment
  • Preparation method and preparation system of special corrosion inhibitor for metal equipment
  • Preparation method and preparation system of special corrosion inhibitor for metal equipment

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[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] The preparation method of special corrosion inhibitor for metal equipment includes the following steps:

[0030] A: Dissolve rosin acid and K2CO3 in dimethylformamide, add methyl iodide (MeI), stir for 3 hours, and the TLC spotting reaction is complete;

[0031] B: MeI was removed by rotary evaporation under reduced pressure, extracted with ethyl acetate (EA), concentrated, washed with water to remove dimethylformamide, the organic layer was washed with saturated sodium chloride, dried and concentrated, and the remaining components were washed with 1:10 acetic acid Ethyl ester (EA) / petroleum ether (PE) is purified by silica gel column to obtain the first compound of formula;

[0032] C: under the condition of 0-10 ℃, add ethylenediamine and trimethylaluminum (AlMe ) to toluene, mix uniformly, then add the first compound obtained in step B, fully s...

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Abstract

The invention provides a preparation method and preparation system of a special corrosion inhibitor for metal equipment. The preparation method comprises the following steps that A, abietic acid and K2CO3 are dissolved in dimethylformamide, iodomethane (MeI) is added, stirring is carried out for 3 hours, and a TLC point plate reacts completely; and B, reduced pressure rotary evaporation is carriedout to remove MeI, extracting is carried out with ethyl acetate (EA), concentrating is carried out, and washing with water is carried out to remove dimethylformamide. According to the preparation method and preparation system of the special corrosion inhibitor for the metal equipment, the corrosion inhibitor has good anti-H2S/CO2-corrosion inhibition performance, the thermal stability is good, the toxicity is low, no special pungent smell is generated, the corrosion inhibition rate of the corrosion inhibitor is high and can reach 90%, a second motor drives a filter screen to rotate, so that solid in a mixing solution in a fixing groove is filtered through the filter screen, and the solid falls into a collection box and liquid flows into a sliding shell from a filtering opening. The deviceis simple in structure, solid and liquid can be separated from each other, and the problem of low filtering speed due to the fact that the solid blocks the filtering opening can be solved.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitors, in particular to a method for preparing a special corrosion inhibitor for metal equipment and a preparation system thereof. Background technique [0002] Corrosion inhibitors are chemical substances or compounds that can prevent or slow down the corrosion of materials when they exist in the environment (medium) in an appropriate concentration and form. Therefore, corrosion inhibitors can also be called corrosion inhibitors, and their dosage is very small ( 0.1% to 1%), but the effect is remarkable. This method of protecting metals is called corrosion inhibitor protection. Corrosion inhibitors are used in neutral media (boiler water, circulating cooling water), acidic media (hydrochloric acid for descaling, electroplating Acid dipping solution for rust removal of pre-plated parts) and gas medium (gas phase corrosion inhibitor). [0003] Metal equipment exposed to the air for a long t...

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Application Information

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IPC IPC(8): C23F11/10
CPCC23F11/10
Inventor 于海峰朱文超
Owner 武汉思越化学技术有限公司
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