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Marigold extract compounded corrosion inhibitor and preparation method and application thereof

A technology of marigold and extracts, applied in the field of materials, can solve problems such as equipment corrosion, operational errors, and environmental pollution, and achieve low cost and safe use

Pending Publication Date: 2021-10-26
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the pickling corrosion inhibitors are aimed at the corrosion inhibition of a single acid species and a single metal. They have strong specificity and large difference in effect. Some of them have unstable chemical properties and need to be configured on site. The risk of equipment corrosion accidents is high, and most corrosion inhibitors are expensive, highly toxic, and pollute the environment. Therefore, it is necessary to develop a method that can solve the problem of invasive plant marigold invasion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The specific operations of the preparation method of the marigold extract of the present invention are as follows:

[0025] A. Pre-treatment: After collecting marigolds, air-dry them and place them in a blast oven, dry them at a constant temperature of 60°C for 48-60 hours, take out the marigold powders that are naturally cooled to room temperature and pulverize, with a particle size of 300-1000 μm;

[0026] B. Extraction: Soak marigold powder in 20-80% ethanol solution at room temperature (5-35°C) for 2-4 hours, solid-liquid ratio 1:20-1:40, then reflux extraction in 50-80°C water bath 2~6 hours;

[0027] C. Concentration: Vacuum filter the ethanol extract obtained by reflux to remove the marigold residue powder contained in it, and then take it on a rotary evaporator at 40~80°C to concentrate the solution to 1 / 2~1 / 3 by rotary evaporation volume;

[0028] D. Extraction: Add 2~5 times the volume of petroleum ether to the concentrated ethanol extract, shake it fully an...

Embodiment 1

[0032] Preparation of marigold extract

[0033] A. Pre-treatment: After collecting the marigolds, air-dry them and place them in a blast oven, dry them at a constant temperature of 60°C to 70°C for 60-72 hours, take them out and cool them down to room temperature, and then crush them. The marigolds with a particle size of 150-2000 μm pink;

[0034] B. Extraction: Soak marigold powder in 10-70% ethanol solution at room temperature (5-35°C) for 2-6 hours, solid-liquid ratio 1:25-50, then reflux in a water bath at 60-85°C for 3-9 h;

[0035] C. Concentration: Vacuum filter the ethanol extract obtained by reflux to remove the marigold residue powder contained in it, and then take it on a rotary evaporator at 45~75°C to concentrate the solution to 1 / 4~1 / 2 volume;

[0036] D. Extraction: Add 2~6 times the volume of petroleum ether to the concentrated ethanol extract, shake it fully and let it stand for 15~60 hours, separate the upper layer of petroleum ether from the lower layer ...

Embodiment 2

[0039] Preparation of a compound extract of marigold with metal corrosion inhibitor

[0040] Take Example 1 marigold extract 0.10 g, lauryl dimethyl tertiary ammonium 0.2 g, coconut acid diethanolamide 0.5 g, strontium chloride 0.1 g, add a concentration of 0.5 ~ 5.0 mol / L of hydrochloric acid washing solution, and stir evenly to obtain the target marigold compound corrosion inhibitor.

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Abstract

The invention discloses a marigold extract compounded corrosion inhibitor and a preparation method and application thereof. The marigold extract compounded corrosion inhibitor is prepared from 0.1 g / L to 1.0 g / L of marigold extract, 0.1 g / L to 0.2 g / L of a cationic surface active agent, namely octadecyl dimethyl tertiary ammonium, 0.1 g / L to 0.5 g / L of coconut diethanolamide, 0.01 g / L to 0.1 g / L of strontium chloride and the balance pickling solution. The preparation method comprises the following steps of uniformly mixing and stirring the raw materials according to the formula ratio to obtain a target object, namely the marigold extract compounded corrosion inhibitor. The application refers to the application of the marigold extract compounded corrosion inhibitor in preparation of steel and iron material corrosion inhibitors.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a marigold extract compound corrosion inhibitor, a preparation method and application thereof. Background technique [0002] Marigold (Tagetes erecta L) is an annual herbaceous plant of the genus Marigold in the Compositae family. The stems are erect, thick, with vertical and thin ribs, and the branches are flattened upwards. Leaves pinnately divided; few glands along leaf margin. Inflorescence solitary; involucre cup-shaped, apex with cusp; tongue-shaped flowers yellow or dark orange; tubular flowers corolla yellow. Achene linear, base narrowed, black or brown, covered with short hairs; pappus with 1-2 long awns and 2-3 short blunt scales. The flowering period is July-September. Native to Mexico. It is distributed all over China. It can grow at an altitude of 1150 meters to 1480 meters, mostly in roadside meadows. Marigolds are often sown in spring. Because o...

Claims

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Application Information

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IPC IPC(8): C23G1/04C23G1/08B01D11/02
CPCC23G1/04C23G1/081C23G1/08C23G1/083B01D11/0284
Inventor 李向红邓书端雷然
Owner SOUTHWEST FORESTRY UNIVERSITY