The Preparation of Some Higher Aliphatic Sulfonic Acids

Noller, C. R.; Gordon, James J.

doi:10.1021/ja01330a034

Cited by 30 publications

(19 citation statements)

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“…The sulfonyl chloride was hydrolyzed by refluxing with 1.5 M sodium hydroxide, and the lead salt was precipi-tated with lead acetate after acidifying the mixture with acetic acid. The free acid was obtained from the lead salt by the method of Noller and Gordon [6]. Special care was required to assure the removal of all perceptible traces of hydrochloric acid in this procedure.…”

Section: Source Of Acids and Specific Proceduresmentioning

confidence: 99%

Further investigations of the affinities of anions of strong acids for wool protection

Steinhardt¹,

Fugitt²,

Harris³

1942

J. RES. NATL. BUR. STAN.

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Titration curves of wool with 18 strong acids at 0°, 25°, or 50° C have been added to the data for 19 others presented earlier. Several have been investigated at more than one t emperature. The reversibility of the equilibria m easured has been demonstrated quantitatively. N ew anion-wool dissociation constants, based on modifications of equations previously used to calculate anion-wool affinities, are tabulated for 33 anions, and h eats of dissociation of a few anionwool complexes are also given. The previously reported t endency of affinity to rise with molecular-weight is confirmed ; fairly consist ent relationships between the affinity and the molecular weights of strong organic acids appear.

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Section: Source Of Acids and Specific Proceduresmentioning

confidence: 99%

Further investigations of the affinities of anions of strong acids for wool protection

Steinhardt¹,

Fugitt²,

Harris³

1942

J. RES. NATL. BUR. STAN.

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“…The key aspect of the method was the use of an ion-exchange resin which was specific for noble metals. T h e details of this resin-Srafion NMRR are described in that paper (8). In continued work with this resin, we found that silver (1) is also quantitatively adsorbed on this resin.…”

Section: Literature Citedmentioning

confidence: 74%

“…While alkyl sulfinic acids were prepared according to a method developed in our laboratory (6), the alkyl sulfonic acids were obtained via concentrated nitric acid oxidation of the corresponding thiols (7)(8)(9). The n-butyl thiosulfonate was prepared by hydrogen peroxide (30%) oxidation of n-butyl disulfide according to the method of Hinsberg (IO).…”

Section: E X P E R I M E N T a Lmentioning

confidence: 99%

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Relative molar response of a flame ionization detector to some organic compounds containing sulfur

Filby¹,

Guenther²,

Penzhorn³

1975

Anal. Chem.

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“…T h e EP additives utilized were phosphorous a n d sulfur derivatives, dibenzyl disulfide (DBS), C6H5CH2CH2CsH5, dilauryl disulfide (DLS), C12H25SSC12H25, tricresyl phosphite (TCP), (CH3C6H40)3P, and trilauryl phosphite (TLP), (C12H250)3P. They were purchased commercially and were used without further purification, except the dilauryl disulfide, which was synthesized from dodecyl mercaptan (8). T h e lubricant and EP additives were deposited on the evaporated metal tape by dip-coating in freon at concentrations of 0.1 and 0.05 percentage by weight, respectively.…”

Section: Methodsmentioning

confidence: 99%

Tribochemical Reactions on the Surfaces of Thin Film Magnetic Media

Kondo

Aoki

Seto

1993

Tribology Transactions

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An experimental study has been performed regarding the effect of extreme pressure (EP) additives on minimizing friction in order to achieve the required frictional properties of thin film magnetic media. I n shuttling motion, disuljide additives had no effect on friction, due to their inability to form a protective film. While alkyl phosphite changed the surface to phosphate film and reduced the coefJicient of friction, aryl phosphite was less effective because of the steric hindrance of the aromatic ring generated by hydrolysis. Together with the results of the enthalpy of preferential adsorption measurements, it was concluded that the effectiveness of alkyl phosphite as a n EP additive depended on the formation of a protective film on the rubbing surface and on the strength with which the lubricant anchored to the outermost phosphate surface. Based on these findings, a combination of alkyl phosphite and the ester lubricant exhibited further improved perfarmance for magnetic thin film media.KEYWORDS erally have the disadvantage of lower durability with regard to wear and friction because of their small thickness, approximately 0.2 pm, and smooth surface (2). A fundamental understanding of the tribology of magnetic head-media interfaces, especially of the lubricants, is crucial for the continued growth of the magnetic storage system. Thus, wear and friction issues should be resolved by the appropriate selection of lubricants.The purpose of this study was to reduce the friction of . . evaporated metal tape. The authors investigated the effect of the EP additives, which are blended into the lubricant on the evaporated metal tape with the aim of reducing friction. Some sulfur-and phosphorous-containing EP additives react with the rubbing surface and the newly-formed protective film contributes to the prevention of wear and reduction of friction (3)-(6). In this study, the mechanism of lubrication of EP additives on the evaporated metal tape is also discussed by surface analysis of the tapes and the static thermal reactions of the EP additives with cobaltous oxide.

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The Preparation of Some Higher Aliphatic Sulfonic Acids

Cited by 30 publications

References 0 publications

Further investigations of the affinities of anions of strong acids for wool protection

Further investigations of the affinities of anions of strong acids for wool protection

Relative molar response of a flame ionization detector to some organic compounds containing sulfur

Tribochemical Reactions on the Surfaces of Thin Film Magnetic Media

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