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Preparation method and application of plant acid pickling corrosion inhibitor

A technology of corrosion inhibitor and plant acid, which is applied in the field of preparation of plant pickling corrosion inhibitor, can solve the problems of using organic solvents, aqueous solutions containing organic solvents or organic acid solutions, waste of resources, harmful environment, etc., and achieve production costs Low, high corrosion inhibition efficiency, good water solubility

Inactive Publication Date: 2019-11-19
CHUXIONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing literature reports that in the methods for extracting metal pickling corrosion inhibitors from plants, organic solvents, aqueous solutions containing organic solvents, or organic acid solutions are mostly used as extractants, which are harmful to the environment and cause waste of resources.

Method used

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  • Preparation method and application of plant acid pickling corrosion inhibitor
  • Preparation method and application of plant acid pickling corrosion inhibitor
  • Preparation method and application of plant acid pickling corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Extraction method of oxalic pickling corrosion inhibitor

[0031] S1 Picking the syringa in Zixi Mountain, Chuxiong, Yunnan, washing the syringa, drying in the sun or in a drying oven, crushing and passing through a 100-mesh sieve to obtain plant powder.

[0032] S2 uses distilled water as the extraction solution, according to the material-liquid ratio of 1:19, placed in an ultrasonic instrument at 50°C for 45 minutes, and then vacuum-filtered; Sonicate in an ultrasonic instrument for 30 minutes, vacuum filter, and combine the two filtrates to obtain a crude extract solution.

[0033] The S3 crude extract solution was cooled to room temperature, extracted twice with petroleum ether (volume ratio 1:1) to remove a small amount of lipids; the extracted stock solution was rotary evaporated to about 1 / 3 of the original volume, and the concentrated extract Add absolute ethanol, the volume ratio of ethanol to extract (1.5-2): 1, remove impurities such as polysacchar...

Embodiment 2

[0039] Example 2 Pteris fern pickling corrosion inhibitor extraction method

[0040] S1 Pteris fern is picked from Zixi Mountain in Chuxiong, Yunnan Province. The fern is picked and washed, dried in the sun or dried in a drying oven, crushed and sieved through a 100-mesh sieve to obtain plant powder.

[0041] S2 uses distilled water as the extraction solution, according to the material-to-liquid ratio of 1:15, placed in an ultrasonic instrument at 50°C for 30 minutes, and then vacuum-filtered; Sonicate in an ultrasonic instrument for 30 minutes, vacuum filter, and combine the two filtrates to obtain a crude extract solution.

[0042]S3 crude extract solution is cooled to room temperature, extracts 2 times with sherwood oil (volume ratio 1: 1) to remove a small amount of lipid substance; After extracting, the stock solution is rotary evaporated to 1 / 3 of the original volume, to the concentrated extract Add absolute ethanol to the mixture, the volume ratio of ethanol to the ext...

Embodiment 3

[0048] Example 3 Osmanthus pickling corrosion inhibitor extraction method

[0049] S1 Osmanthus japonica is picked in Zixi Mountain, Chuxiong, Yunnan Province. After picking Osmanthus osmanthus, wash, dry in the sun or in a drying oven, crush and sieve through a 100-mesh sieve to obtain plant powder.

[0050] S2 uses distilled water as the extraction solution, according to the material-liquid ratio of 1:20, placed in an ultrasonic instrument at 50°C for 45 minutes, and vacuum filtration; the obtained filter residue is added with distilled water according to the material-liquid ratio of 1:20, placed Sonicate in an ultrasonic instrument for 30 minutes, vacuum filter, and combine the two filtrates to obtain a crude extract solution.

[0051] S3 crude extract solution is cooled to room temperature, extracts 2 times with sherwood oil (volume ratio 1: 1) to remove a small amount of lipid substance; After extracting, the stock solution is rotary evaporated to 1 / 3 of the original volu...

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Abstract

The invention provides a preparation method for a plant acid pickling corrosion inhibitor. According to the preparation method, five pteridophytes serve as raw materials, and the carbon steel acid pickling corrosion inhibitor is prepared through the steps of ultrasonic extraction, extraction separation, alcohol precipitation and impurity removal, concentration and drying and the like. The preparation method has the advantages that the plant acid pickling corrosion inhibitor is extracted from the five pteridophytes for the first time, the highest corrosion inhibition efficiency of the plant acid pickling corrosion inhibitor extracted from the five pteridophytes is 85% or above under an experiment condition, it is illustrated that the industrial value of the pteridophytes for preparing the plant acid pickling corrosion inhibitor is extremely high, the industrial value of the pteridophytes in addition to the aspects of plant taxonomy and pharmacological biology is excavated, and a new application field is developed for the pteridophytes; and compared with a synthesized organic acid pickling corrosion inhibitor, the plant acid pickling corrosion inhibitor has the characteristics of being simple in preparation process, low in production cost, good in water solubility, non-toxic, easily degradable, high in corrosion inhibition efficiency, worthy of large-scale popularization and application and the like.

Description

technical field [0001] The invention relates to the field of corrosion inhibitor production, in particular to a preparation method and application of a plant pickling corrosion inhibitor. Background technique [0002] Pickling usually refers to a chemical cleaning method for metal substrates. Commonly used cleaning agents include inorganic acids such as hydrochloric acid, sulfuric acid, hydrofluoric acid, nitric acid, and chromic acid, and organic acids such as citric acid, sulfamic acid, and EDTA. . Due to its mature smelting technology and relatively low price, carbon steel is widely used as an important metal material in the manufacture of industrial equipment. Hydrochloric acid and sulfuric acid are commonly used pickling agents for pickling of carbon steel equipment. During the use of the pickling solution, it often contacts the metal substrate to cause "over-corrosion". Therefore, a certain amount of corrosion inhibitor should be added to the cleaning solution to red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/08
CPCC23G1/06C23G1/081
Inventor 陈文黄德兴
Owner CHUXIONG NORMAL UNIV
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