Properties of High Boiling Petroleum Products. Physical and Chemical Characterization Studies with Relation to Polynuclear Aromatic Components

Wanless, G. G.; Eby, L. T.; Rehner, John

doi:10.1021/ac60052a006

Cited by 20 publications

(11 citation statements)

References 13 publications

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“…CHBr, + CH2=CH2--4-CHBr2CH2CH2Br CHBr2CH2CH2Br + HgF2 CHF2CH2CH2Br 3-Chloro-l, 1,l-trifluoropropane was prepared in 50% yield by the thermal chlorination of 1,1,l-trifluoropropane at 380°C ., as described in the literature (16). A 2.8:1 ratio of 3-chloro-l,1,1trifluoropropane to 2-chloro-l, 1,1-trifluoropropane was obtained.…”

Section: Peroxidementioning

confidence: 86%

Reducing Carcinogenicity of High Boiling Petroleum Products

Eby¹,

Rehner²,

Kuschner³

et al. 1954

Ind. Eng. Chem.

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Section: Peroxidementioning

confidence: 86%

Reducing Carcinogenicity of High Boiling Petroleum Products

Eby¹,

Rehner²,

Kuschner³

et al. 1954

Ind. Eng. Chem.

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“…SEVERAL physical and chemical properties of polycyclic aromatic hydrocarbons have shown limited correlation with carcinogenic activity. These include reactions with perbenzoic acid (7), lead tetraacetate (9), osmium tetraoxide (2, 3,18), p-nitrobenzenediazonium chloride (8), and maleic anhydride (12,18). However, none of these reactions has proved to be particularly useful as a method for predicting the carcinogenic properties of high boiling petroleum fractions.…”

Section: Maynard E Hall1mentioning

confidence: 99%

“…These four basic facts have led to the development of five methods for predicting the tumor forming potency of petroleum fractions. Two of the methods have been briefly described (6,18). These and the other methods will be treated in detail in this paper.…”

Section: Maynard E Hall1mentioning

confidence: 99%

“…Caffeine Number. This method is based upon the ultraviolet absorption of an extract of the sample, using an aqueous caffeine solution as the extractant (10,18). The very high molecular weight polycy'dic hydrocarbons, which are not carcinogenic, are insoluble in the caffeine solution, and the lower aromatics (benzenes, naphthalenes, and phenanthrenes) do not absorb at 340 µ.…”

Section: Biological Tumor Potencymentioning

confidence: 99%

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Properties of High Boiling Petroleum Products

Eby¹,

Priestley²,

Rehner³

et al. 1953

Anal. Chem.

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ANDThe only methods heretofore described for predicting carcinogenic activity have been limited to series of pure aromatic compounds or to high]>-specialized types of petroleum products. After examination of a number of different reactions and properties of polycyclic aromatic compounds, five nonbiological methods have been developed for the prediction of tumor potency of high boiling petroleum products. Each method gave about the same degree of correlation with biological data. These physical-chemical methods are all based upon measurements of certain types of polycyclic aromatic hydrocarbons. The results support the premise t h a t the carcinogenicity is a function qf the concentration of these types of compounds in oils. The methods, therefore, obviate the necessity of isolating or analyzing the actual carcinogenic compounds. The caffeine number method is preferred for routine analytical work. It is based upon a n ultraviolet examination of a n aqueous caffeine extract of the aromatic hydrocarbons. A standard deviation of 8.4 was obtained for the difference between the predicted and the biological tumor potency values of 123 different products. Reproducibility of the caffeine number was better than t h a t of the biological data. Comprehensive analytical data for all five methods are presented for a variety of high boiling petroleum products. These demonstrate t h a t a choice of methods is available, depending upon the particular types of products to be analyzed and the facilities a t hand.

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“…Charts for obtaining molecular weight from refractive index and boiling point are illustrated and a recommendation is made that petroleum fractions be first simplified by distillation, adsorption, extraction, etc. Wanless et al (120) described methods for characterizing high boiling petroleum products containing polynuclear aromatic hydrocarbons, involving refractometry, chromatography, ultraviolet absorption, selective extraction of some aromatic hydrocarbons with aqueous caffeine solution, maleic anhydride adduct formation, and oxidation. Varsanyi (117) determined alkylaromatic constituents by ultraviolet absorption, showing that this property of the homologs changes gradually so that the curve of a single homolog can be used.…”

Section: Gasolinementioning

confidence: 99%

Petroleum

Levin¹

1952

Anal. Chem.

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ANALYTICAL CHEMISTRY continues to be an important il.factor contributing to progress in the field of petroleum. This is adequately illustrated in this review, which is concerned with the literature for approximately one year from that covered in the previous review (60). CRUDE OILThe Institute of Petroleum (44) studied the principles involved in the laboratory evaluation of crude oil. Morgan and Turner (71) concluded, from a study with iron, calcium, and sodium as radiochemical tracers, that if combustion is carefully controlled at ignition temperatures not exceeding 550°C ., ash corresponding to quantitative recovery of metallic constituents of petroleum oil is obtained.

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Properties of High Boiling Petroleum Products. Physical and Chemical Characterization Studies with Relation to Polynuclear Aromatic Components

Cited by 20 publications

References 13 publications

Reducing Carcinogenicity of High Boiling Petroleum Products

Reducing Carcinogenicity of High Boiling Petroleum Products

Properties of High Boiling Petroleum Products

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