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Cattail extract compounded corrosion inhibitor as well as preparation method and application thereof

A technology of extracts and corrosion inhibitors, which is applied in the field of cattail extract compound corrosion inhibitors and its preparation, can solve problems such as equipment corrosion, operational errors, and environmental pollution, and achieve the effect of 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 have problems such as high price, high toxicity, and environmental pollution. Therefore, it is necessary to develop a method that can solve the problem of invasive plant cattail

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 cattail extract of the present invention are as follows:

[0025] A. Pre-treatment: after collecting cattails, air-dry them and place them in a blast oven, dry them at a constant temperature of 60°C for 48-60 hours, take them out and cool them down to room temperature, and then crush them into cattail powder with a particle size of 300-1000 μm;

[0026] B. Extraction: Soak cattail powder in 20-60% ethanol solution at room temperature (10-30°C) for 2-4 hours, solid-liquid ratio 1:20-40, then reflux in a water bath at 50-80°C for 2-6 hours ;

[0027] C. Concentration: Vacuum filter the ethanol extract obtained by reflux to remove the cattail 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 volume ;

[0028] D. Extraction: Add 2~5 times the volume of petroleum ether to the concentrated ethanol extract, shake it fully and let it stand for 12~48...

Embodiment 1

[0032] Preparation of cattail extract

[0033] A. Pre-treatment: After collecting cattails, air-dry them and place them in a forced air oven, dry them at a constant temperature of 60°C to 70°C for 60 to 72 hours, take them out and cool them down to room temperature, then pulverize them into cattail powder with a particle size of 150 to 2000 μm;

[0034] B. Extraction: Soak cattail 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 hours ;

[0035] C. Concentration: vacuum filter the ethanol extract obtained by reflux to remove the cattail 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 lowe...

Embodiment 2

[0039] Preparation of a cattail compound metal corrosion inhibitor

[0040] Get Example 1 cattail extract 1.0 g, macromolecular compound polyacrylamide 0.2 g, nonionic surfactant coconut acid diethanolamide 0.5 g, N-heterocyclic compound 6-amino-2-thiouracil 0.1 g, Add hydrochloric acid washing solution with a concentration of 0.5-5.0 mol / L in a volume of 1 L, and stir evenly to obtain the target cattail compound corrosion inhibitor.

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Abstract

The invention discloses a cattail extract compounded corrosion inhibitor as well as a preparation method and application thereof. The cattail extract compounded corrosion inhibitor is prepared from, 0.1 g / L-1.0 g / L of cattail extract, 0.1 g / L-0.2 g / L of polyacrylamide, 0.1 g / L-0.5 g / L of coco fatty acid diethanol amide, 0.01 g / L-0.1 g / L of 6-amino-2-thiouracil and the balance pickling solution. The preparation method comprises the step of uniformly mixing and stirring the raw materials according to the formula ratio to obtain the target cattail extract compound corrosion inhibitor; and the cattail extract compounded corrosion inhibitor is applied to preparation of a corrosion inhibitor for steel and iron materials.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a cattail extract compound corrosion inhibitor and its preparation method and application. Background technique [0002] Typha orientalis Presl (Latin name: Typha orientalis Presl), perennial deciduous, perennial emergent monocotyledons, likes a warm and sunny environment. Stems very short and inconspicuous. The leaves are almost turquoise, and the edge of the leaf sheath is membranous. The flowers are unisexual, monoecious; the full flowering period is in summer, and the normal stems will grow rapidly when the plants mature, and there will be spikes at the top; the pollen is bright yellow. Cattail leaves and green spikes are often used to decorate garden pools and lakesides to build water features. Suitable for flower borders and waterscape background materials. Gardens can also be arranged in pots. There are about 18 species of plants in the same genus, and t...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/08B01D11/02
CPCC23G1/06C23G1/08C23G1/081C23G1/083B01D11/02B01D11/0292
Inventor 邓书端李向红
Owner SOUTHWEST FORESTRY UNIVERSITY
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