Sperm oil

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Sperm oil is a waxy liquid obtained from sperm whales. It is a clear, yellowish liquid with a very faint odor. Sperm oil has a different composition from common whale oil, obtained from rendered blubber. Although it is traditionally called an "oil", it is technically a liquid wax. It is composed of wax esters with a small proportion of triglycerides, an ester of an unsaturated fatty acid, and a branched-chain fatty alcohol. [1] It is a natural antioxidant and heat-transfer agent. [1] In the late-18th and early-19th centuries, sperm oil was prized as an illuminant for its bright, odorless flame and as a lubricant for its low viscosity and stability. It was supplanted in the late 19th century by less expensive alternatives such as kerosene and petroleum-based lubricants. With the 1987 international ban on whaling, sperm oil is no longer legally sold. [2]

Contents

The oil from bottlenose whales was sometimes called "Arctic sperm oil." It was cheaper than and inferior to true sperm oil. [3] [4]

Processing

Sperm oil is extracted from the spermaceti organ and the junk of the sperm whale. Sperm whale head anatomy (transverse + sagittal).svg
Sperm oil is extracted from the spermaceti organ and the junk of the sperm whale.

After killing a sperm whale, the whalers would pull the carcass alongside the ship, cut off the cranium and haul it on deck, whereupon they would cut a hole in it and bail out the matter inside with a bucket. The primary source of sperm oil was the spermaceti organ and the junk (or "melon"), the organs that serve to focus and modulate the animal's vocalizations. The matter from these organs was stored in casks to be processed on land; sometimes it was boiled first to prevent it going rancid. The blubber also contained smaller proportions of spermaceti, which was obtained by boiling the blubber on the ship itself.

On land, the casks of head-matter were allowed to chill during the winter, causing it to congeal into a spongy and viscous mass. The congealed matter was then loaded into wool sacks and placed in a press to squeeze out its liquid. This liquid was bottled and sold as "winter-strained sperm oil". This was the most valuable product: a lubricant that remained liquid in freezing winter temperatures. When spring came and the leftover solid matter melted a bit, the liquid was strained off and sold as "spring-strained sperm oil". In summer, the matter melted some more and the liquid was strained off to leave a fully solid wax. This wax, brown in color, was then bleached and sold as "spermaceti wax". [5] [6]

Chemistry

Physical properties of sperm oil
specific gravity 0.884 at 15.6 °C [7]
flash point 260–266 °C [8]
saponification value 120–150.3 [9]
unsaponifiable matter17.5–44.0% [9]
refractive index 1.4649 at 15.6 °C [10] [11]
iodine number (Wijs) 70.4–96.4 [9]
viscosity 21–23 cSt at 37.5 °C [12]
viscosity index 180 [13]

Sperm oil has a fairly low viscosity (roughly equal to coconut oil). [12] It retains its viscosity in high temperatures better than most oils. It does not tend to become rancid, dry out, or corrode metals. Sperm oil cannot be easily hydrogenated, and thus could not be used to make soap or margarine. [14] [15] It is fairly resistant to oxidization. [16]

Spermaceti is a liquid wax, composed mostly of wax esters (chiefly cetyl palmitate) and a smaller proportion of triglycerides, [17] with oleic acid being the most common fatty acid. The proportion of wax esters in the spermaceti organ increases with the age of the whale: 38-51% in calves, 58-87% in adult females, and 71-94% in adult males. The blubber oil of the whale is about 66% wax. [18] When cooled to below 30 °C (86 °F), the waxes in spermaceti begin to crystallize. [19]

Winter-strained sperm oil is roughly two-thirds wax esters and one third triglycerides. [20] [21] Most of the carbon chains are unsaturated, with 18:1 being the most common. [22] Unlike other toothed whales save the Amazon river dolphin, most of the carbon chains in the wax esters are relatively long (C10-C22). [18]

Applications

US consumption of sperm oil peaked in the mid-19th century, then saw a precipitous decline. US Sperm Oil Imports 1805-1905.jpg
US consumption of sperm oil peaked in the mid-19th century, then saw a precipitous decline.

Sperm oil was particularly prized as an illuminant in oil lamps, as it burned more brightly and cleanly than any other available oil and gave off no foul odor. [6] It was replaced in the late-19th century by cheaper, more efficient kerosene.[ citation needed ]

In the US, sperm oil was used in cars as an additive to automatic transmission fluid until it was banned by the Endangered Species Act. [23] Prior to 1972, over 30 million lb (14 million kg) of sperm whale oil was used annually in lubricants because of its exceptional lubricity and heat stability. [24] In 1972, the sperm whale was listed as an Endangered Species. The following year, the US Congress amended the Endangered Species Act, outlawing the killing of whales and the use of their oil. [24] The loss of sperm oil had a profound impact in the automotive industry, [25] where for example, transmission failures rose from under 1 million in 1972 to over 8 million by 1975. [24]

Sperm oil was a popular lubricant. It worked well for fine, light machinery such as sewing machines and watches because it is thin, does not congeal or dry out and does not corrode metals. It was also used in heavy machinery such as locomotives and steam-powered looms because it can withstand high temperatures. [26] In the late 20th century, jojoba oil was discovered to be a better substitute for high-friction applications because it is even more stable at high temperatures. This caused sperm oil's price to collapse to a tenth of its previous value. [27]

Because of its very low freezing point, sperm oil saw widespread use in the aerospace industry. [28]

Sperm oil was used to protect metals from rust. A coat of sperm oil provided a temporary protection for the metal components in firearms, because it did not dry out or gum up. [29] [30] It was the basis of the original (but not current) Rust-Oleum.[ citation needed ]

Related Research Articles

A lubricant is a substance that helps to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces. The property of reducing friction is known as lubricity.

<span class="mw-page-title-main">Triglyceride</span> Any ester of glycerol having all three hydroxyl groups esterified with fatty acids

A triglyceride is an ester derived from glycerol and three fatty acids. Triglycerides are the main constituents of body fat in humans and other vertebrates, as well as vegetable fat. They are also present in the blood to enable the bidirectional transference of adipose fat and blood glucose from the liver, and are a major component of human skin oils.

<span class="mw-page-title-main">Wax</span> Class of organic compounds which are malleable at room temperature

Waxes are a diverse class of organic compounds that are lipophilic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give low viscosity liquids. Waxes are insoluble in water but soluble in nonpolar organic solvents such as hexane, benzene and chloroform. Natural waxes of different types are produced by plants and animals and occur in petroleum.

<span class="mw-page-title-main">Motor oil</span> Lubricant used for lubrication of internal combustion engines

Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. They typically consist of base oils enhanced with various additives, particularly antiwear additives, detergents, dispersants, and, for multi-grade oils, viscosity index improvers. The main function of motor oil is to reduce friction and wear on moving parts and to clean the engine from sludge and varnish (detergents). It also neutralizes acids that originate from fuel and from oxidation of the lubricant (detergents), improves the sealing of piston rings, and cools the engine by carrying heat away from moving parts.

Saponification is a process of cleaving esters into carboxylate salts and alcohols by the action of aqueous alkali. Typically aqueous sodium hydroxide solutions are used. It is an important type of alkaline hydrolysis. When the carboxylate is long chain, its salt is called a soap. The saponification of ethyl acetate gives sodium acetate and ethanol:

<span class="mw-page-title-main">Sperm whale</span> Largest species of toothed whale

The sperm whale or cachalot is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus Physeter and one of three extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia.

<span class="mw-page-title-main">Spermaceti</span> Waxy substance found in the head cavities of sperm whales

Spermaceti is a waxy substance found in the head cavities of the sperm whale. Spermaceti is created in the spermaceti organ inside the whale's head. This organ may contain as much as 1,900 litres (500 US gal) of spermaceti. It has been extracted by whalers since the 17th century for human use in cosmetics, textiles, and candles.

<span class="mw-page-title-main">Melon (cetacean)</span> Mass of fat found in all toothed whales

The melon is a mass of adipose tissue found in the foreheads of all toothed whales. It focuses and modulates the animal's vocalizations and acts as a sound lens. It is thus a key organ involved in communication and echolocation.

<span class="mw-page-title-main">Spermaceti organ</span> Part of a sperm whale

The spermaceti organ is an organ present in the heads of toothed whales of the family Physeteroidea, in particular the sperm whale. This organ contains a waxy liquid called spermaceti and is involved in the generation of sound.

<span class="mw-page-title-main">Saponification value</span> Milligrams of a base required to saponify 1g of fat

Saponification value or saponification number represents the number of milligrams of potassium hydroxide (KOH) or sodium hydroxide (NaOH) required to saponify one gram of fat under the conditions specified. It is a measure of the average molecular weight of all the fatty acids present in the sample in form of triglycerides. The higher the saponification value, the lower the fatty acids average length, the lighter the mean molecular weight of triglycerides and vice versa. Practically, fats or oils with high saponification value are more suitable for soap making.

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<span class="mw-page-title-main">Jojoba oil</span> Oil extracted from jojoba seeds

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Jojoba esters are the hydrogenation or transesterification product of Jojoba oil. Jojoba Esters are commonly used in cosmetic formulations as an emollient, due to its remarkable similarity to the natural oils produced by the human skin, and its high oxidative stability. Fully hydrogenated jojoba esters are most often small beads used to exfoliate the skin.

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Oil additives are chemical compounds that improve the lubricant performance of base oil. The manufacturer of many different oils can utilize the same base stock for each formulation and can choose different additives for each specific application. Additives comprise up to 5% by weight of some oils.

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<span class="mw-page-title-main">Sperm whaling</span> Human hunting of sperm whales

Sperm whaling is the human practice of hunting sperm whales, the largest toothed whale and the deepest-diving marine mammal species, for the oil, meat and bone that can be extracted from the cetaceans' bodies.

<span class="mw-page-title-main">Defoamer</span> Chemical additive that reduces and hinders the formation of foam in liquids

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References

  1. 1 2 [Transmission Digest, Volume 26, No. 2, October 2006, "The Science of Synthetic Sperm Whale Oil"]
  2. ↑ "$2,000 Penalty Assessed for Illegal Attempted Sale of Sperm Whale Oil Over Internet". NOAA . 8 June 2004. Archived from the original on 30 October 2004.
  3. ↑ Julius Lewkowitsch (1904). Chemical technology and analysis of oils, fats, and waxes. pg 870
  4. ↑ "Official Swatch Website - Swatch International". Archived from the original on 22 November 2013. Retrieved 13 March 2014.
  5. ↑ "Historic Nantucket Magazine".
  6. 1 2 Wilson Heflin (2004). Herman Melville's Whaling Years. pg 232
  7. ↑ Emil F. Dieterichs (1916). A Practical Treatise On Friction, Lubrication, Fats And Oils. pg 22
  8. ↑ Richard P. Pohanish (2005). HazMat Data: For First Response, Transportation, Storage, and Security. pg 865
  9. 1 2 3 Moninder Mohan Chakrabarty (2009). Chemistry And Technology Of Oils And Fats. pg 183
  10. ↑ Blakeley, Abraham G.; Reilly, Edmund A. (1917). "Some Data on Sperm Oils Used for Burning Purposes". Journal of Industrial & Engineering Chemistry. 9 (12): 1099–1100. doi:10.1021/ie50096a014.
  11. ↑ J. N. Goldsmith (1921). Table of Refractive Indices. pg 239
  12. 1 2 "Liquids - Kinematic Viscosities". www.engineeringtoolbox.com.
  13. ↑ William Gordon Forbes (1943). Lubricants and cutting oils for machine tools. pg 69
  14. ↑ Joh. N. Tønnessen, Arne Odd Johnsen (1984). The History of Modern Whaling, pg 228.
  15. ↑ Robert Lloyd Webb (1988). On the Northwest: Commercial Whaling in the Pacific Northwest, 1790-1967. pg 144
  16. ↑ Czesław Kajdas, S. S. K. Harvey, E. Wilusz (1990). Encyclopedia of Tribology, Volume 15. pg 308.
  17. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 1 June 2013. Retrieved 29 October 2012.{{cite web}}: CS1 maint: archived copy as title (link)
  18. 1 2 William F. Perrin, Bernd Würsig, J. G. M. Thewissen (2002). Encyclopedia of Marine Mammals. pg 1164
  19. ↑ Malcolm R. Clarke (1978). Physical Properties of Spermaceti Oil in the Sperm Whale. Journal of the Marine Biological Association of the United Kingdom Archived 2008-12-17 at the Wayback Machine
  20. ↑ Spencer, G. F.; Tallent, W. H. (1973). "Sperm whale oil analysis by gas chromatography and mass spectrometry". Journal of the American Oil Chemists' Society. 50 (6): 202–206. doi:10.1007/BF02640490. S2CID   95490342.
  21. ↑ "J.W. Hagemann and J.A. Rothfus (1978). Oxidative Stability of Wax Esters by Thermogravimetric Analysis. JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY, Vol .56, No.6. Pages: 629-631". Archived from the original on 8 April 2013. Retrieved 23 December 2012.
  22. ↑ "Gayland F. Spencer (1978). Alkoxy-Acyl Combinations in the Wax Esters from Winterized Sperm Whale Oil by Gas Chromatography-Mass Spectrometry". Archived from the original on 8 April 2013. Retrieved 30 December 2012.
  23. ↑ Information, Reed Business (1 May 1975). "New Scientist". Reed Business Information – via Google Books.{{cite web}}: |first= has generic name (help)
  24. 1 2 3 Landis, Phil. Gears for the Transmission Rebuilding Industry. Oxnard: Automatic Transmission Rebuilders Association, 2010. Print.
  25. ↑ "Transmission Problems in Cars Linked to Ban on Whale Killing". The New York Times. 17 April 1975. Retrieved 1 March 2020.
  26. ↑
    Paul Lucier, Scientists and Swindlers (2008). Consulting on Coal and Oil in America. pg 152.
  27. ↑ James R. McGuigan, R. Charles Moyer, Frederick H. deB Harris (2010). Managerial Economics, pg 29.
  28. ↑ American Whaling, New Bedford Whaling Museum. Modified August 22, 2014.
  29. ↑ Roy F. Dunlap (1963). Gunsmithing: The complete sourcebook of firearms design, construction, alteration, and restoration for amateur and professional gunsmiths. pg= 84.
  30. ↑ William S. Brophy (1985). The Springfield 1903 Rifles. pg 71.
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