Sweet crude oil is a type of petroleum. The New York Mercantile Exchange designates petroleum with less than 0.42% sulfur as "sweet". Petroleum containing higher levels of sulfur is called sour crude oil.
Sweet crude oil contains small amounts of hydrogen sulfide and carbon dioxide. High-quality, low-sulfur crude oil is commonly used for processing into gasoline and is in high demand, particularly in the industrialized nations. "Light sweet crude oil" is the most sought-after version of crude oil as it contains a disproportionately large amount of these fractions that are used to process gasoline (naphtha), kerosene, and high-quality diesel (gas oil). The term "sweet" originates from the fact that a low level of sulfur provides the oil with a mildly sweet taste and pleasant smell. Nineteenth century prospectors would taste and smell small quantities of oil to determine its quality.
Famous quotes containing the words sweet, crude and/or oil:
“His purposes will ripen fast,
Unfolding ev’ry hour;
The bud may have a bitter taste,
But sweet will be the flow’r.”
—William Cowper (1731–1800)
“The idealism of Berkeley is only a crude statement of the idealism of Jesus, and that again is a crude statement of the fact that all nature is the rapid efflux of goodness executing and organizing itself.”
—Ralph Waldo Emerson (1803–1882)
“To make a good salad is to be a brilliant diplomatist—the problem is entirely the same in both cases. To know exactly how much oil one must put with one’s vinegar.”
—Oscar Wilde (1854–1900)