• WordNet 3.6
    • n potash a potassium compound often used in agriculture and industry
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Webster's Revised Unabridged Dictionary
    • n Potash (Chem) The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; -- hence called also caustic potash.
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Century Dictionary and Cyclopedia
    • n potash A substance obtained by leaching wood-ashes, evaporating the solution obtained, and calcining the residuum; one of the fixed alkalis; the so-called vegetable alkali; more or less impure or crude potassium carbonate, or carbonate of potash as formerly generally (and still very frequently) designated; any combination of which potassium forms the base, whether containing oxygen or not. Potash-salts play a most important part in vegetable life, existing in all plants in various proportions, and in various combinations with both inorganic and organic acids. When plants are burned, the inorganic constituents remain behind in the ashes, and it is by the lixiviation or leaching of these ashes that potash was first obtained, a process with which the Greeks and Romans were acquainted, although they were unable clearly to distinguish potash from soda, calling them both by the same name (νιτρον, nitrum). The name potash is of comparatively modern origin, and is derived from the fact that the potassiferous solution from wood-ashes was boiled down or concentrated in pots. It was not until about the middle of the eighteenth century that the two alkalis, soda and potash, were clearly distinguished from each other; but they were considered to be simple substances until after the beginning of the nineteenth century, when their metallic bases were separated from them by Davy (1807-8). Up to comparatively recent times the potash compounds used in the arts—and they are numerous and of great importance—were chiefly obtained in the form of crude potash after the method indicated as having given origin to the name of this alkali, and this method is still in use, although much less important than it formerly was. Saltpeter, or the nitrate of potash, had been long known, and obtained in a very different way. (See saltpeter.) Since the beginning of the present century potash has been obtained in considerable quantity from the refuse of beet-root used in the manufacture of sugar, and from sheep's wool. It has also been got (in the form of the chlorid) from sea-water; but the most important source of supply is the region near Stassfurt in Prussia, where two minerals containing potassic compounds (carnallite, a double chlorid of potassium and magnesium, and cænite, containing sulphates of potash and magnesia with chlorid of magnesium) are found in abundance, and mined on a large scale. From these naturally occurring potassiferous compounds all the various salts of potash used in the arts are manufactured, and it is by using the potash-salts obtained at Stassfurt that the Chili saltpeter (nitrate of soda) is converted into common saltpeter or niter (nitrate of potash), a substance important as the principal ingredient in the manufacture of gunpowder.
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Chambers's Twentieth Century Dictionary
    • n Potash pot′ash a powerful alkali, obtained from the ashes of plants—also Potass′
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Webster's Revised Unabridged Dictionary
Pot, + ash,
Chambers's Twentieth Century Dictionary
Pot ashes.


In literature:

Potash, soda and hartshorn (or ammonia) are the best known.
"The Wonder Island Boys: Exploring the Island" by Roger Thompson Finlay
Potash, in solution, is best for the purpose.
"The Wonder Island Boys: The Mysteries of the Caverns" by Roger Thompson Finlay
Make a saturate solution of bichromate of potash.
"Handwork in Wood" by William Noyes
The younger apprentice was near the door scrubbing type with potash to cleanse it.
"Clayhanger" by Arnold Bennett
In like manner, the boards for your house are to be had at the sawmill for logs, for potash, for wheat, for oats.
"Canada and the Canadians, Vol. 2" by Richard Henry Bonnycastle
A plant at the seaside yields soda; the same plant grown inland produces potash.
"The Atlantic Monthly , Volume 2, No. 14, December 1858" by Various
In addition to the mouth washing in the ulcerative cases it is advisable to use internally chlorate of potash.
"The Eugenic Marriage, Volume IV. (of IV.)" by Grant Hague
I found that the nitrate of potash is almost the same in its effects as the carbonate.
"Notes and Queries, No. 181, April 16, 1853" by Various
From Baltic lands came naval stores, and potash so necessary to the woolen industry.
"Beginnings of the American People" by Carl Lotus Becker
Fatty acids are readily saponified with caustic soda or caustic potash of all strengths.
"The Handbook of Soap Manufacture" by W. H. Simmons

In news:

Potash Producers Must Face Buyers' US Antitrust Lawsuit.
Potash Corp of Saskatchewan Inc.
Canpotex CEO sees potash demand recovering soon.
Demand for the crop nutrient potash is seen recovering in the second quarter despite a weak start to the year, the head of marketing consortium Canpotex told Reuters Full story.
San Juan County Commission Chairman Bruce Adams said last week that the long-awaited potash mining development near Hatch Rock north of Monticello is expected to begin on-site work soon.
OWN Acquires Yoav Potash 's Crime After Crime for Documentary Film Club.
Los Angeles, CA – OWN: Oprah Winfrey Network is acquiring Yoav Potash 's inspiring documentary Crime After Crime, it was announced today by Lisa Erspamer, chief creative officer, OWN.
Exploratory well for potash nearly complete.
BHP Abandons Pursuit of Potash Corp.
BHP Bid for Potash Gets Modest Boost.
BHP Billiton's bid for Potash Corp. Sunday September 2nd 2012.
BHP Bid For Potash Makes Sense, Analysts Say.
Canada's Potash Corp. Rejects Bid by Miner BHP to Tap Agriculture Market.
Research shows it boosts ridge-till and no-till corn yields Injecting potash 5-7 deep in the row can put a charge in ridge-till and no-till corn yields, says Iowa State University (ISU) soil scientist Antonio Mallarino.
CN Article Proposed CN-served potash terminal at Prince Rupert port passes environmental muster.

In science:

In the United Kingdom the UK Dark Matter Collaboration operates a facility in the Boulby potash mine (3350 mwe).
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