- an impure form of sodium sulfate, especially as obtained by the interaction of sulfuric acid and common salt in the synthesis of hydrochloric acid: used chiefly in the manufacture of glass, ceramic glazes, soaps, and sodium salts.
Origin of salt cake
First recorded in 1695–1705
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for salt cake
The gaseous mixture is drawn by a chimney draught through the coke towers, as in the making of salt-cake.
The production of salt-cake or crude sodium sulphate is carried out in two stages.
Mechanical furnaces are now used to a large extent for the salt-cake process.
The mixture of common salt and vitriol is charged into the salt-cake pot, which is heated by a fire below.
- an impure form of sodium sulphate obtained as a by-product in several industrial processes: used in the manufacture of detergents, glass, and ceramic glazes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012