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

A technology of pickling corrosion inhibitor and nicotinic acid, applied in the field of corrosion inhibitor, can solve the problems of carcinogenicity, environmental pollution, application limitation, etc., and achieve the effects of strong adaptability, high corrosion inhibition efficiency and simple use method.

Inactive Publication Date: 2019-05-28
GUIZHOU MINZU UNIV
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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
Since Jatropha curcas cake contains anti-nutritional factors and toxins such as phorbol esters, lectins, and trypsin inhibitors, it has certain limitations in the application field, and there is currently no information on the extraction of Jatropha curcas for pickling and corrosion inhibition. There are reports on compounding or synergizing the agent with other plant extracts, which needs further research and development

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of Jatropha curcas cake extract

[0023] (1) Pulverize the Jatropha curcas cake with a pulverizer so that the particle size is 80 mesh;

[0024] (2) Put Jatropha curcas cake in 0.04% NaHCO 3 Solution, heat treatment at 120°C for 20 minutes;

[0025] (3) Using 85% ethanol as the extractant, extracting for 2 hours at a ratio of 1:12 between ethanol solution and Jatropha curcas cake at a temperature of 52°C;

[0026] (4) Take the Jatropha curcas cake after leaching, add hydrochloric acid solution in the ratio of 6:1 by liquid-solid ratio, and extract for 5 hours at a temperature of 60° C. under agitation;

[0027] (5) Filter or centrifuge the mixture of the above acid solution and Jatropha curcas cake, and collect the filtrate or supernatant.

[0028] 2. Preparation of eucalyptus bark extract: Mix 5% hydrochloric acid solution with eucalyptus bark at a ratio of 10:1, extract at 80°C for 5 hours and then filter, then heat and concentrate the filtrate at 80...

Embodiment 2

[0033] 1. Preparation of Jatropha curcas cake extract

[0034] (1) Pulverize the Jatropha curcas cake with a pulverizer so that the particle size is 100 mesh;

[0035] (2) Put Jatropha curcas cake in 0.08% NaHCO 3 Solution, heat treatment at 130°C for 30 minutes;

[0036] (3) Using 85% ethanol as the extractant, extracting for 3 hours at a ratio of 1:15 between ethanol solution and Jatropha curcas cake at a temperature of 53°C;

[0037] (4) Get the Jatropha curcas cake after leaching, add hydrochloric acid solution in the ratio of 9:1 by the liquid-solid ratio, and extract for 8 hours at a temperature of 100° C. under agitation;

[0038] (5) Filter or centrifuge the mixture of the above acid solution and Jatropha curcas cake, and collect the filtrate or supernatant.

[0039] 2. Preparation of eucalyptus bark extract: mix 8% hydrochloric acid solution with eucalyptus bark at a ratio of 13:1, extract at 100°C for 7 hours and then filter, then heat and concentrate the filtrate...

Embodiment 3

[0044] 1. Preparation of Jatropha curcas cake extract

[0045] (1) Pulverize the Jatropha curcas cake with a pulverizer so that the particle size is 90 mesh;

[0046] (2) Put Jatropha curcas cake in 0.06% NaHCO 3 Solution, heat treatment at 126°C for 26 minutes;

[0047] (3) Using 85% ethanol as the extractant, leaching for 2.7 hours at a ratio of 1:13 between ethanol solution and Jatropha curcas cake at a temperature of 53°C;

[0048] (4) Take the Jatropha curcas cake after leaching, add acid solution in the ratio of 8:1 by liquid-solid ratio, and extract for 6 hours at a temperature of 80° C. under agitation;

[0049] (5) Filter or centrifuge the mixture of the above acid solution and Jatropha curcas cake, and collect the filtrate or supernatant.

[0050] 2. Preparation of eucalyptus bark extract: mix 6% hydrochloric acid solution with eucalyptus bark at a ratio of 12:1, extract at 95°C for 6 hours and then filter, then heat and concentrate the filtrate at 80°C.

[0051]...

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Abstract

The invention discloses a preparation method of acid pickling corrosion inhibitor and application of the acid pickling corrosion inhibitor. The acid pickling corrosion inhibitor comprises, by mass, 20-60 parts of barbadosnut cake meal extract, 10-30 parts of eucalyptus bark extract, 2-4 parts of propylene glycol, 3-5 parts of sodium laurate and 1-5 parts of nicotinic acid. When the acid pickling corrosion inhibitor is used, diluted acid serves as an acid pickling solution, the acid pickling corrosion inhibitor is added, and the mass of the acid pickling corrosion inhibitor is 3-8% of the totalmass of the diluted acid. An application method is simple, effective, safe, harmless and biodegradable. By the adoption of the preparation method of the acid pickling corrosion inhibitor and the application of the acid pickling corrosion inhibitor, the problem that toxic components exist in the barbadosnut cake meal extract is solved, the effect of synergy of the barbadosnut cake meal extract andthe eucalyptus bark extract is obvious, the corrosion inhibition efficiency is high, and the adaptability is high.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to a preparation method and application of a pickling corrosion inhibitor. Background technique [0002] Metal materials occupy a very important position in modern industry and agriculture, machinery, transportation, national defense and science and technology. However, metal materials are extremely prone to corrosion. According to statistics, the amount of metal scrapped due to corrosion in the world is equivalent to 1 / 4-1 / 3 of the annual output; 3.1%-4.5%. Corrosion inhibitor has become one of the most effective anti-corrosion technologies due to its advantages of convenient use, wide application range, low investment and quick effect. [0003] In chemical production, acid is widely used in operations such as pickling, pickling, pickling and acidizing of oil wells. Commonly used acids are mineral acids such as hydrochloric acid, sulfuric acid and phosphoric acid. In practice, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
Inventor 潘贵英杨成曾广能范百龄王晓丹陶秀珍黄承玲谭承建
Owner GUIZHOU MINZU UNIV