Identification of Thiols in a Wasson, Texas, Crude Oil Distillate Boiling from 111° to 150° C.

Abstract

Characterization of the naturally occurring sulfur compounds in petroleum is of both theoretical and practical interest to petroleum chemists and geologists. This paper describes a systematic procedure for the concentration and identification of 35 individual thiols present in a Wasson, Texas, crude oil distillate boiling from 111°to 150°C. The procedures applied included distillation, alumina adsorption, chemical extraction, gas-liquid chromatography, microdesulfurization, and infrared spectroscopy. Many Cs and Ce thiols, not commercially available, were synthesized, and GLC retention times and infrared spectra of some of these are presented. The procedures described represent a systematic method of sulfur compound analysis that should have general application in petroleum studies.

Identification and Synthesis of 2-Heptanethiol, a New Flavor Compound Found in Bell Peppers

“…2-Heptanethiol is a new natureidentical component never described in food before. It has been cited as a constituent of crude oil distillate (19), natural gas (20), and in a Japanese patent focusing on asymmetric synthesis of optically active thioesters and thiols (21).…”

Spectrophotometric determination of primary aromatic amines with 9-chloroacridine

“…of organic amines with 9-chloroacridine to give highly colored 9-aminoacridine hydrochlorides has been reported by Burckhalter et al (1,2). There are, however, no reported examples of the quantitative determination of amines with 9-chloroacridine.…”

Crude Petroleum

“…There are good indications [119] that elemental sulfur is present in some crude petroleums and its presence is thought to indicate that the crude petroleum containing it may not have been subjected to temperatures much above 100 0 C. The most abundant sulfur compound-types in the lower boiling ranges, below 150 0 C, appear to be the thiols [121]. Thiaalkanes [122] and cydoalkylthiaalkanes [123] though present, occur in minor amounts.…”