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A kind of composite pickling corrosion inhibitor of jatropha curcas cake extract and preparation method thereof

A technology of Jatropha curcas cake and extract is applied in the field of compound acid-washing corrosion inhibitor of Jatropha curcas cake and its preparation field, which can solve the problems to be further researched and developed, and achieve good development prospects and good Corrosion inhibition, overcoming the effect of toxic components

Inactive Publication Date: 2021-04-09
GUIZHOU MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 research reports on compounding or synergizing the agent with other plant extracts, which needs further research and development

Method used

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  • A kind of composite pickling corrosion inhibitor of jatropha curcas cake extract and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of Jatropha curcas cake extract:

[0021] (1) Pulverize the Jatropha curcas cake with a pulverizer so that the particle size is 60 mesh;

[0022] (2) Put Jatropha curcas cake in 0.04% NaHCO 3 Solution, heat treatment at 120°C for 20 minutes;

[0023] (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;

[0024] (4) get the jatropha curcas cake after leaching, add acid solution in the ratio of 6:1 by liquid-solid ratio, extract 5 hours under 60 ℃, stirring conditions at temperature; described acid solution is 3% hydrochloric acid, A mixed solution of 1% oxalic acid and 1% tannic acid.

[0025] (5) Filter or centrifuge the mixture of the above acid solution and Jatropha curcas cake, and collect the filtrate or supernatant;

[0026] 2. Preparation of pomelo peel extract: use hydrochloric acid of pH 2.5 and disodium hydrogen phosphate-citric acid buff...

Embodiment 2

[0029] 1. Preparation of Jatropha curcas cake extract:

[0030] (1) Pulverize the Jatropha curcas cake with a pulverizer so that the particle size is 100 mesh;

[0031] (2) Put Jatropha curcas cake in 0.08% NaHCO 3 Solution, heat treatment at 130°C for 30 minutes;

[0032] (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;

[0033] (4) Get the jatropha curcas cake after leaching, add acid solution in the ratio of 9:1 by liquid-solid ratio, and extract 8 hours under 100 ℃, stirring conditions at temperature; Described acid solution is 3% hydrochloric acid, A mixed solution of 2% oxalic acid and 2% tannic acid.

[0034] (5) Filter or centrifuge the mixture of the above acid solution and Jatropha curcas cake, and collect the filtrate or supernatant;

[0035] 2. Preparation of pomelo peel extract: use hydrochloric acid of pH 2.5 and disodium hydrogen phosphate-citric aci...

Embodiment 3

[0038] 1. Preparation of Jatropha curcas cake extract:

[0039] (1) Pulverize the Jatropha curcas cake with a pulverizer so that the particle size is 80 mesh;

[0040] (2) Put Jatropha curcas cake in 0.06% NaHCO 3 Solution, heat treatment at 128°C for 26 minutes;

[0041] (3) Using 85% ethanol as the extractant, extracting for 2.8 hours at a ratio of 1:13 between ethanol solution and Jatropha curcas cake at a temperature of 53°C;

[0042] (4) Get the jatropha curcas cake after leaching, add acid solution in the ratio of 8:1 by liquid-solid ratio, and extract 7 hours under 80 ℃, stirring conditions at temperature; Described acid solution is 3% hydrochloric acid, A mixed solution of 2% oxalic acid and 1% tannic acid.

[0043] (5) Filter or centrifuge the mixture of the above acid solution and Jatropha curcas cake, and collect the filtrate or supernatant;

[0044] 2. Preparation of pomelo peel extract: use hydrochloric acid of pH 2.5 and disodium hydrogen phosphate-citric acid ...

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Abstract

The invention discloses a compound pickling corrosion inhibitor of jatropha curcas cake extract and a preparation method thereof, which belong to the technical field of corrosion inhibitors. The present invention optimizes the process of extracting acid corrosion inhibitor from jatropha curcas cake, removes toxic protein and phorbol ester, overcomes the problem that the acid corrosion inhibitor extracted from jatropha curcas cake is toxic, and uses pomelo peel extract and leprosy The tree cake extract has a synergistic effect, high corrosion inhibition efficiency, strong adaptability, and obviously inhibits the corrosion effect of acid on steel and aluminum materials, and more importantly, it has a good corrosion inhibition effect on zinc, zinc and aluminum alloys. The corrosion inhibitor of the invention is safe, harmless, biodegradable, and easy to use, and can be applied to cleaning petrochemical equipment, boilers, and even tap water pipelines, and has good development prospects.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to a compound pickling corrosion inhibitor of jatropha curcas cake extract and a preparation method thereof. Background technique [0002] As the most important engineering material, metal has a long history of being widely used all over the world. However, the corrosion of metal has also become a global problem. Metal corrosion is the phenomenon that metal is damaged under the action of corrosive media such as water, oxygen, electrolyte ions, acid, alkali, chemical gas and mineral oil. During the processing and utilization of metal materials, it is necessary to remove the corroded oxide layer on the surface. Frequent use Hydrochloric acid, sulfuric acid and other inorganic acids are cleaned and removed. In order to remove the oxide layer and at the same time ensure that the effective part is not corroded by acid, a common method is to add a corrosion inhibitor to the pickling solution. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06
Inventor 杨成潘贵英曾广能范百龄王晓丹朱四喜王志康黄承玲
Owner GUIZHOU MINZU UNIV
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