High-efficient compounding plant inhibitor as well as preparation method and application thereof

A technology of corrosion inhibitors and plants, which is applied in the field of high-efficiency compound plant corrosion inhibitors and its preparation, can solve the problems of hindering the development and application of corrosion inhibitors, poor water solubility, application restrictions, etc., and achieve obvious synergy, low cost, quick results

Active Publication Date: 2016-07-13
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Satisfactory inorganic salt corrosion inhibitors were developed before the 1980s: chromate, nitrite, mercury salt, arsenic compound, but because these inorganic salts can cause cancer and pollute the environment, their application is limited
However, the cost of this type of organic corrosion inhibitors is high and their water solubility is poor, especially the discharge of organic phosphorus corrosion inhibitors will cause water eutrophication, which seriously hinders the development and application of corrosion inhibitors

Method used

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  • High-efficient compounding plant inhibitor as well as preparation method and application thereof
  • High-efficient compounding plant inhibitor as well as preparation method and application thereof
  • High-efficient compounding plant inhibitor as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0019] The preparation method of the high-efficiency compound plant corrosion inhibitor includes raw material preparation and preparation steps, specifically including:

[0020] A. Raw material preparation: prepare plant extracts for subsequent use, prepare natural polymer compounds, auxiliary agents, and pickling liquid for subsequent use;

[0021] B. Preparation: Add plant extracts, natural macromolecular compounds, and auxiliary agents into the pickling solution according to the ratio of raw materials, stir and mix well to obtain the target product.

[0022] 8. The method for preparing a high-efficiency compound plant corrosion inhibitor according to claim 7, characterized in that: the plant extracts are walnut green bark extract and black wattle leaf extract, and the walnut green bark extract is prepared according to Prepared in the following steps:

[0023] A. Pre-treatment: After collecting walnut green skin, remove surface impurities, rinse with water to remove dust, d...

Embodiment 1

[0036] Embodiment 1 - the preparation of walnut green husk extract

[0037]A. Pre-treatment: After collecting walnut green skin, remove surface impurities, rinse with water to remove dust, drain surface moisture, first cut into slices with a knife, air-dried, put in a blast oven, dry at 50°C for 60 hours, take out the natural Pulverized after cooling to room temperature, the walnut green skin powder with a particle size of 300-1000 μm;

[0038] B. Extraction: Soak walnut green skin powder with 10% ethanol solution at 10°C for 4 hours, solid-to-liquid ratio 1:20, then reflux in a water bath at 50°C for 3 hours;

[0039] C. Concentration: Vacuum suction filtration of the ethanol extract obtained by reflux to remove the walnut green husk powder contained therein, and then take it on a rotary evaporator at 40 ° C to concentrate the solution to 1 / 3 volume by rotary evaporation;

[0040] D. Extraction: Add 5 times the volume of petroleum ether to the concentrated ethanol extract, s...

Embodiment 2

[0042] Embodiment 2——Preparation of walnut green husk extract

[0043] A. Pre-treatment: After collecting walnut green skin, remove surface impurities, rinse with water to remove dust, drain surface moisture, first cut into slices with a knife, air-dried and put in a blast oven, dry at 60°C for 48 hours, take out the natural Pulverized after cooling to room temperature, the walnut green skin powder with a particle size of 300-1000 μm;

[0044] B. Extraction: Soak the walnut green peel powder with a concentration of 45% ethanol solution at 20°C for 2.5h, the solid-to-liquid ratio is 1:25, and then reflux in a water bath at 65°C for 3.5h;

[0045] C. Concentration: Vacuum suction filtration of the ethanol extract obtained by reflux to remove the walnut green husk powder contained therein, and then take it on a rotary evaporator at 40 ° C to concentrate the solution to 1 / 2 volume by rotary evaporation;

[0046] D. Extraction: Add 3.5 times the volume of petroleum ether to the co...

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Abstract

The invention discloses a high-efficient compounding plant inhibitor as well as a preparation method and application thereof. The high-efficient compounding plant inhibitor is prepared from 0.03-1.5 g/L of a plant extract, 0.05-0.1 g/L of a natural polymer compound, 0.01-0.05 g/L of an auxiliary agent and the balance of a pickling solution. The preparation method comprises the steps of preparing raw materials and performing compounding. The high-efficient compounding plant inhibitor can be applied for preparing cleaning agents for steel, petro-chemical equipment, filtration and pipelines. The high-efficient compounding plant inhibitor disclosed by the invention has the advantages of being high in corrosion inhibition efficiency, remarkable in mutual synergistic reaction, high in adaptability, after effectiveness and high temperature resistance, and the like, and besides, the corrode effects of acid to steel and aluminum are remarkably restrained, so that the high-efficient compounding plant inhibitor can be suitable for pickling the steel and the aluminum in the acid, and can be applied for cleaning equipment including the petro-chemical equipment, boilers, pipeline and the like. The inhibitor disclosed by the invention is convenient and safe to use and simple to operate, and takes effect quickly.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion inhibitors, in particular to a high-efficiency compound plant corrosion inhibitor and its preparation method and application. Background technique [0002] Metal materials occupy a very important position in modern industry and agriculture, machinery, transportation, national defense and science and technology. Steel has the advantages of low price, good machining performance, and large output. It is the first metal to be considered in the process of material selection and use, and it is also one of the most widely used metals at present. However, metal materials are extremely prone to corrosion, and the damage is very serious. It is estimated that the amount of iron and steel scrapped due to corrosion is equivalent to 1 / 4-1 / 3 of the annual output in the world every year; the annual loss caused by corrosion accounts for 3.1%-4.5% of the gross domestic product (GDP). Corrosion inhibitor h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
CPCC23G1/06
Inventor 李向红邓书端
Owner SOUTHWEST FORESTRY UNIVERSITY
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