Extraction of Sulfur Compounds with Hydrogen Fluoride

Lien, A. P.; McCaulay, D. A.; Evering, B. L.

doi:10.1021/ie50480a012

Cited by 8 publications

(8 citation statements)

References 3 publications

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“…The data indicate that within probable limits of analytical error, equilibrium may be attained with a contact time of 5 minutes or less. These results are in accordance with the theory previously proposed (11), that hydrogen fluoride extraction occurs as the result of an acid-base reaction. Further work has demonstrated that as little as 1 or 2 minutes is sufficient to achieve complete separation of phases, even with heavier stocks such as gas oil; this rapid separation is attributable to the extremely low viscosity and surface tension of hydrogen fluoride as well as to the large density differential between hydrogen fluoride and hydrocarbon.…”

Section: Effect Of Variables On Hydrogen Fluoride Extractionsupporting

confidence: 93%

“…A new development in this field-extraction with anhydrous hydrogen fluoride-offers interesting possibilities. The action of hydrogen fluoride toward individual sulfur compounds and the chemical aspects of hydrogen fluoride extraction have been described in a previous paper from this laboratory (11)', additional work on individual sulfur compounds has been reported by Barieau and Barusch (5) and by Meadow and White (12). Application of hydrogen fluoride extraction to refinery stocks has been discussed by Scafe (13), and by Schneider and coworkers (14, IB).…”

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confidence: 93%

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Hydrogen Fluoride Extraction of High-Sulfur Virgin Petroleum Stocks

Lien¹,

Evering²

1952

Ind. Eng. Chem.

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Section: Effect Of Variables On Hydrogen Fluoride Extractionsupporting

confidence: 93%

mentioning

confidence: 93%

Hydrogen Fluoride Extraction of High-Sulfur Virgin Petroleum Stocks

Lien¹,

Evering²

1952

Ind. Eng. Chem.

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“…Many other solvents, such as aniline, propylene, glycol, and furfural, have been proposed but are not completely satisfactory. Extraction of individual organic sulfur compounds with anhydrous hydrogen fluoride shows an orderly progression with changes in sulfur type, in molecular weight, or in configuration of substituent groups (154). This order is roughly the same as the order of adsorption observed for silica gel.…”

Section: Processes For Segregating Sulfur Compoundssupporting

confidence: 56%

Sulfur Compounds from Petroleum Fractions

Karchmer¹

1954

Advances in Chemistry

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In considering the sulfur-containing compounds obtain able from petroleum and its fractions five principal topics are discussed-sulfur compound types that occur in pe troleum and its fractions; methods of identifying, deter mining, and naming sulfur compounds; the chemical and physical properties of the sulfur compounds likely to be found in petroleum fractions; the effect of the various refinery processes upon the constituent sulfur compounds; and processes for segregating and manufacturing sulfur compounds from petroleum fractions. Included in this discussion are a number of key literature references which provide additional information and leads for continuing the search. In addition to specific references, general ref erence sources are given, such as the U. S. Patent Class and Subclasses, the work of the Bureau of Mines and API Project 48, a list of periodicals that generally publish articles on sulfur petroleum chemistry, and the names of those organizations that are actively engaged in the field. I η searching for information on the sulfur compounds obtainable from petroleum, the most inclusive single guide is the Chemical Abstracts. Very few fields of human endeavor can boast such a comprehensive, well-organized source of knowledge. However, it is this completeness that presents an obstacle to the searcher who has but a limited amount of time to spend on a subject that may embrace several different categories of the Abstracts. The chemistry of the sulfur compounds derivable from petroleum is such a case, since the sheer number of all the published reports on sulfur make the task of the literature searcher who is selecting the pertinent references monumental. Almost limitless amounts of time are required to locate each promising lead in the index, ferret it out in the Abstracts, and follow through, if necessary, to the original article. The examination of the abstracts alone requires large amounts of time. Of necessity the wording in the indexes must be brief, and many false leads are obtained from those clipped and sometimes cryptic phrases. Promising references which appear to contain the desired information in many cases turn out to be valueless.While there is no short cut method of examining all of the published information on sulfur, any systematic division of the subject into smaller topics should aid in reducing the time spent to obtain fruitful results. It is, therefore, the object of this paper to subdivide the problem into its component parts and to acquaint the searcher with the key points of each subdivision by summarizing some of the most important work published in the field and presenting a bibliography with the appropriate subject category. Typical and significant references are included. The intent has been to include many references which contain large bibliographies and which give leads to other information in that subject. It is hoped that with these summaries and lists of references as a background, the searcher will be aided in making his own study of his particular problem. 398Downlo...

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“…Although they effect some desulfurization, the selectivities for sulfur compounds are too lo~v to make them attractive for desulfurization alone. Acidic solvents, such as hydrogen fluoride and sulfuric acid, show almost the opposite effect; they are highly selective for sulfur compounds but remove aromatics to only a slight extent (7)(8)(9). -4 solvent having intermediate properties would be useful where both desulfurization and aromatic removal are desired.…”

Section: He Increasing Sulfur and Aromatics Content Of Petroleummentioning

confidence: 99%

“…Extraction Studies. The effect of structure on complexing tendencies of sulfur compounds has been demonstrated by extraction from heptane solutions with anhydrous hydrofluoric acid (8,9). Similar studies with sulfur dioxide, both alone and promoted by aluminum chloride, were carried out to show the effect of promoter and to provide a comparison with hydrofluoric acid EFFECT OF PROMOTER.…”

Section: Studies With Individual Compoundsmentioning

confidence: 99%