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Water soluble reproducible corrosion inhibitor and preparation method and application thereof

A corrosion inhibitor, water-soluble technology, applied in the field of water-soluble renewable corrosion inhibitor and its preparation, can solve the problems of high toxicity of corrosion inhibitor, non-renewable raw materials, secondary environmental pollution, etc., and achieve no irritating odor, Good environmental friendliness, no by-products

Inactive Publication Date: 2019-06-11
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a water-soluble renewable corrosion inhibitor and its preparation method and application, to solve the problems of existing corrosion inhibitors with high toxicity, refractory degradation, poor water solubility, high cost, The process is complicated, it is easy to cause secondary pollution to the environment, and the raw materials are not renewable.

Method used

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  • Water soluble reproducible corrosion inhibitor and preparation method and application thereof
  • Water soluble reproducible corrosion inhibitor and preparation method and application thereof
  • Water soluble reproducible corrosion inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) By measuring the acid value and saponification value of the jacaranda oil, then calculating the molecular weight of the jacaranda oil according to the acid value and saponification value, and determining the proportioning relationship between the raw materials according to the relationship between the jacaranda oil and other reactants. Among them, the acid value determination method is in accordance with GB / T 5530-2005 Determination of acid value of animal and vegetable oils, and the saponification value determination method is in accordance with GB / T 5534-2008 Determination of saponification value of animal and vegetable oils.

[0031] Determination of the molecular weight of the jasmine oil: according to M=(56.1*3*1000) / (saponification value-acid value), the molecular weight M of the jasmine oil is calculated. Then according to the known quality of the jacaranda oil, the amount of the unsaturated fatty acid in the jacaranda oil can be obtained.

[0032] The relatio...

Embodiment 2

[0044] 1) Determination of the molecular weight of jacaranda oil: with embodiment 1.

[0045] 2) in the there-necked flask that reflux device, stirrer and thermometer are equipped with, add jatropha oil and ethylene amine, the mol ratio of jasmine oil and ethylene amine is 1:1.3, then add cyclohexane and potassium hydroxide to it, The mass ratio of potassium hydroxide, cyclohexane and jacaranda oil is 0.06:0.5:1, and the amination reaction is carried out at 145°C for 3h, then the temperature is raised to 185°C, and the cyclization reaction is carried out for 2.0h. Separating the by-product water produced in the process, stopping the heating after the reaction to obtain the corrosion inhibitor intermediate;

[0046] 3) Add isopropanol to the corrosion inhibitor intermediate obtained in step 2), and then slowly add dimethyl phosphite so that the molar ratio of the corrosion inhibitor intermediate to dimethyl phosphite is 1:1.2. React, stir and reflux for 2.5 hours to obtain the...

Embodiment 3

[0048] 1) Determination of the molecular weight of jacaranda oil: with embodiment 1.

[0049] 2) In the three-necked flask equipped with reflux device, stirrer and thermometer, add jatropha oil and ethylene amine, the mol ratio of jasmine oil and ethylene amine is 1: 1.3, then add chloroform and boric acid to it, boric acid, chloroform and The mass ratio of jacaranda oil is 0.06:0.6:0.8. The amination reaction is carried out at 150°C for 3.5h, then the temperature is raised to 180°C, and the cyclization reaction is carried out for 1.5h. By-product water, stop heating after the reaction to obtain the corrosion inhibitor intermediate;

[0050] 3) Add isopropanol to the corrosion inhibitor intermediate obtained in step 2), and then slowly add dimethyl phosphite so that the molar ratio of the corrosion inhibitor intermediate to dimethyl phosphite is 1:1.4. React, stir and reflux for 2.6 hours to obtain the water-soluble reproducible corrosion inhibitor.

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Abstract

The invention discloses a water soluble reproducible corrosion inhibitor and a preparation method and application thereof. With idesia oil and vinylamine as raw materials, amination and cyclization reactions are performed under the functions of catalyst and water carrying agents, an obtained product and dimethyl phosphite react with each other, and the water soluble reproducible corrosion inhibitor is obtained. The prepared water soluble reproducible corrosion inhibitor is small in dosage, the corrosion inhibition efficiency is high, the water soluble reproducible corrosion inhibitor is free of poison or harm to the environment and is biodegradable, the heat stability is good, pungent smell is avoided, the water solubility is good, and the development requirement of green corrosion inhibitors is met. The reaction conditions of the method are easy to control, the process is simple, the method is environmentally friendly, the cost is low, the source of raw materials is wide, the water soluble reproducible corrosion inhibitor is reproducible, cheap and easy to obtain, industrial production is easy, and a new thought is provided for preparing the environment-friendly sustainable development corrosion inhibitors.

Description

technical field [0001] The invention belongs to the technical field of metal anticorrosion, and in particular relates to a water-soluble renewable corrosion inhibitor and its preparation method and application. Background technique [0002] Carbon steel refers to an iron-carbon alloy with a carbon content of less than 2% and a small amount of impurities such as silicon, manganese, phosphorus, and sulfur. It is widely used in all aspects of machinery manufacturing, especially since the industrial revolution in the 18th century, the global demand for carbon steel as a raw material for various products and structures, including buildings, vehicles, electronic equipment, pipes and household appliances, etc. Increase. Corrosion layers are inevitably formed during daily transportation, hot rolling, surface treatment, operation and storage. At the same time, steel rolling in the iron and steel industry needs to be pickled to remove iron oxide scale and other dirt on the steel surf...

Claims

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Application Information

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IPC IPC(8): C23F11/167C23G1/06
Inventor 于海莲易分胡震陈鑫张仁书范秀军
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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