Salts of Sulfated Oleic Acid Amides as Acid Corrosion Inhibitors

2021 ◽  
Vol 625 (3) ◽  
pp. 36-38
Author(s):  
E. K. Aminova ◽  
◽  
V. V. Fomina ◽  
Keyword(s):  
Oleic Acid ◽  
Sulfuric Acid ◽  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Carboxylic Acids ◽  
Ammonium Salt ◽  
Dilute Hydrochloric Acid ◽  
Corrosion Inhibitors ◽  
Acid Corrosion ◽  
Protective Ability

This work is a continuation in a series of studies on the preparation of acid corrosion inhibitors based on carboxylic acids. A method of synthesis of acid corrosion inhibitors based on oleic acid amides has been developed. Several syntheses have been carried out to increase its inhibitory properties. The substances were obtained in several stages. At the first stage, amino alcohols were added to the ОA, then the resulting compounds were sulfonated with sulfuric acid. To expand the field of various inhibitors, reactions with bases are produced. As a result, salts of sulfated amides of oleic acid synthesized with amino nitrates, sulfuric acid and aqueous solutions of bases were formed. To establish the effectiveness of the compounds obtained, the protective ability in dilute hydrochloric acid was evaluated. It is established that some of the obtained substances exhibit the corresponding properties of inhibitors. In this case, the most effective is the ammonium salt of sulfated diethanolamide oleic acid.

Corrosion inhibition of some azole derivatives on carbon steel in hydrochloric acid solution

2014 ◽  
Vol 61 (5) ◽  
pp. 300-306 ◽  
Author(s):  
B.P. Markhali ◽  
R. Naderi ◽  
M. Sayebani ◽  
M. Mahdavian
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Acid Corrosion ◽  
Molecular Structures ◽  
Inhibition Mechanism ◽  
Content Type

Purpose – The purpose of this paper is investigate the inhibition efficiency of three similar bi-cyclic organic compounds, namely, benzimidazole (BI), benzotriazole (BTAH) and benzothiazole (BTH) on carbon steel in 1 M hydrochloric acid (HCl) solution. Organic inhibitors are widely used to protect metals in acidic media. Among abundant suggestions for acid corrosion inhibitors, azole compounds have gained attention. Design/methodology/approach – The inhibition efficiency of the three organic compounds was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Findings – Superiorities of BTH and BTAH corrosion inhibitors were shown by EIS data and polarization curves. Moreover, the results revealed that BTAH and BTH can function as effective mixed-type adsorptive inhibitors, whereas no inhibition behavior was observed for BI. Both BTAH and BTH obeyed Longmuir adsorption isotherm. The results obtained from this isotherm showed that both inhibitors adsorbed on the specimen surface physically and chemically. The difference in inhibition efficiencies of BTAH, BTH and BI was related to the presence of nitrogen and sulfur hetero atoms on their molecular structures. Originality/value – This study evaluated inhibition efficiency of BI, BTAH and BTH using electrochemical methods. In addition, the study attempted to find inhibition mechanism of the inhibitors and to find modes of adsorption of the inhibitors, correlating effects of heteroatoms and inhibition efficiency.

Effect of Inhibitors on Scale Removal in HCl Pickling Solutions

CORROSION ◽  
1968 ◽  
Vol 24 (2) ◽  
pp. 45-49 ◽  
Author(s):  
O. L. RIGGS ◽  
R. M. HURD
Keyword(s):  
Hydrochloric Acid ◽  
Corrosion Inhibitors ◽  
Functional Relationship ◽  
Acid Corrosion ◽  
Optimum Concentration ◽  
Metal Dissolution ◽  
Inhibitor Concentration ◽  
Temperature Dependent ◽  
Scale Removal ◽  
Selection Of

Abstract Inhibitors are available which effectively reduce the loss of metal because of corrosion occurring in the hydrochloric acid pickling baths. Selection of these inhibitors, however, must take into consideration the effect the inhibitor will have on scale dissolution. The optimum concentration of inhibitor must consider the functional relationship between inhibitor concentration and the rate of scale removal. This relationship is not the same as that between inhibitor concentration and metal dissolution rate. Data are shown on scale dissolution rates for two corrosion inhibitors in 10 percent by weight hydrochloric acid at temperatures of 55 through 85 C (131–185 F). Extrapolations to somewhat higher temperatures of some pickling operations can be made. However, it was observed that all corrosion inhibitor effects on scale removal became somewhat temperature-dependent at, or near, 80 C. The experimental acid corrosion inhibitors (B and C) exhibit surfactant behavior between 55–75 C, removing scale more quickly than did the uninhibited acid.

PROPERTIES OF CALF THYMUS HISTONE ISOLATED BY THREE DIFFERENT METHODS

1958 ◽  
Vol 36 (1) ◽  
pp. 1-13 ◽  
Author(s):  
L. B. Smillie ◽  
G. C. Butler ◽  
David B. Smith
Keyword(s):  
Nucleic Acid ◽  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Sedimentation Rate ◽  
Principal Components ◽  
Dilute Hydrochloric Acid ◽  
Original Material ◽  
Salting Out ◽  
Calf Thymus ◽  
Two Stages

Histone of calf thymus deoxyribonucleoprotein was isolated by three different methods: (1) Extraction from nucleoprotein solutions with dilute hydrochloric acid. (2) Extraction from cold saline nucleoprotein solutions with ethanol. (3) Salting out part of the histone, followed by removal of the nucleic acid from the remainder as an insoluble lanthanum salt. Similar yields were obtained in all cases. Measurements of fractional solubility, electrophoretic mobility, and sedimentation rate disclosed the presence of two principal components corresponding roughly to those obtained in the two stages of method (3). Alterations of one component were found to take place in aqueous solutions more alkaline than pH 4.0, resulting in the appearance of artifacts some of which sedimented more rapidly, while others sedimented more slowly, than the original material.

The Salt Makers

2019 ◽  
Author(s):  
Peter Wothers
Keyword(s):  
Organic Matter ◽  
Sulfuric Acid ◽  
Nitric Acid ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Periodic Table ◽  
Dilute Hydrochloric Acid ◽  
Common Salt ◽  
Distilled Water ◽  
Metal Sulfate

This chapter looks at the elements from the penultimate group of the periodic table—the halogens (‘salt-formers’). We shall see that the first of these elements was discovered by Scheele during his investigations of the mineral pyrolusite. Lavoisier knew of the element but he failed to recognize it as such since he was convinced the gas had to contain oxygen and so must be a compound. It was left to Davy to prove that this was not so, which led to the English chemist naming this element that had been discovered (but not properly named) over thirty years before by the great Scheele. Davy’s choice was to influence the names given to all the members of this group, including the most recent member named in 2016. There are three common acids known as mineral acids, since they may all be obtained by heating combinations of certain minerals. Their modern names are nitric acid, sulfuric acid, and hydrochloric acid. Of these three, hydrochloric was probably the last to be discovered. Nitric and sulfuric acids were obtained in the thirteenth or early fourteenth centuries, but the earliest unambiguous preparation of relatively pure hydrochloric acid is from a hundred years later, in a manuscript from Bologna which translates as Secrets for Colour. It gives a curious recipe for a water to soften bones: ‘Take common salt and Roman vitriol in equal quantities, and grind them very well together; then distil them through an alembic, and keep the distilled water in a vessel well closed.’ As we saw in Chapter 3, ‘Roman vitriol’ is a hydrated metal sulfate, probably iron or copper sulfate; its mixture with salt, when heated, produces water and hydrogen chloride, which together form the acid solution. Later texts from the sixteenth and seventeenth centuries include similar methods to prepare this so-called spirit of salt, or ‘oyle of salt’. The first mentioned use, to soften bones, is indeed best achieved with hydrochloric acid, which readily dissolves the minerals from bone to leave only the organic matter largely intact. Leave a chicken bone in dilute hydrochloric acid for a few hours, and it may easily be bent without breaking.

PROPERTIES OF CALF THYMUS HISTONE ISOLATED BY THREE DIFFERENT METHODS

1958 ◽  
Vol 36 (1) ◽  
pp. 1-13 ◽  
Author(s):  
L. B. Smillie ◽  
G. C. Butler ◽  
David B. Smith
Keyword(s):  
Nucleic Acid ◽  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Sedimentation Rate ◽  
Principal Components ◽  
Dilute Hydrochloric Acid ◽  
Original Material ◽  
Salting Out ◽  
Calf Thymus ◽  
Two Stages

Histone of calf thymus deoxyribonucleoprotein was isolated by three different methods: (1) Extraction from nucleoprotein solutions with dilute hydrochloric acid. (2) Extraction from cold saline nucleoprotein solutions with ethanol. (3) Salting out part of the histone, followed by removal of the nucleic acid from the remainder as an insoluble lanthanum salt. Similar yields were obtained in all cases. Measurements of fractional solubility, electrophoretic mobility, and sedimentation rate disclosed the presence of two principal components corresponding roughly to those obtained in the two stages of method (3). Alterations of one component were found to take place in aqueous solutions more alkaline than pH 4.0, resulting in the appearance of artifacts some of which sedimented more rapidly, while others sedimented more slowly, than the original material.

Über die Umsetzung von Kupfersulfat mit Carbonsäuren und Carbonsäurederivaten in wäßrigen Lösungen unter hydrothermalen Bedingungen/The Reaction of Copper Sulfate with Carboxylic Acids and their Derivatives in Aqueous Solutions under Hydrothermal Conditions

1987 ◽  
Vol 42 (2) ◽  
pp. 157-162 ◽  
Author(s):  
F. Seel ◽  
J. Schuh
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Sulfuric Acid ◽  
Amino Acid ◽  
Aqueous Solutions ◽  
Carboxylic Acids ◽  
Saturated Fatty Acids ◽  
Metallic Copper ◽  
Reaction Products ◽  
Hydrothermal Conditions

Abstract Under hydrothermal conditions aqueous solutions of copper(II) sulfate (1) are reduced by means of saturated fatty acids with hydrogen at the α-atom to yield crystalline copper. In all cases carbon dioxide is liberated and lower fatty acids and ketones can be identified as reaction products. α-Hydroxy and α-aminocarboxylic acids proved to be very effective reducing agents towards 1. The yield of copper varied from 2 to 2.5 mol Cu per 1 mol of amino acid. The reaction of 1 is suppressed by sulfuric acid. The presence of hydrochlorid acid or chlorides leads to the precipitation of copper(I) chloride. The mechanisms of the decomposition of the various types of carboxylic acids is discussed. It was also possible to precipitate metallic copper by means of various proteins.

scholarly journals ACID CORROSION INHIBITORS SYNTHESIS ON THE BASIS OF OLEIC ACID AND AMINO ALCOHOL

2019 ◽  
pp. 116 ◽  
Author(s):  
Elmira K. Aminova ◽  
Vera V. Fomina ◽  
Natalya A. Likhacheva ◽  
Olga B. Prozorova ◽  
Veana N. Gaysina ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Amino Alcohol ◽  
Corrosion Inhibitors ◽  
Acid Corrosion
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