salt cake

noun

, Chemistry.

1. 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.

salt cake

noun

1. 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

Word History and Origins

Origin of salt cake¹

First recorded in 1695–1705

Example Sentences

The production of salt-cake or crude sodium sulphate is carried out in two stages.

From Project Gutenberg

Mechanical furnaces are now used to a large extent for the salt-cake process.

From Project Gutenberg

The mixture of common salt and vitriol is charged into the salt-cake pot, which is heated by a fire below.

From Project Gutenberg

The gaseous mixture is drawn by a chimney draught through the coke towers, as in the making of salt-cake.

From Project Gutenberg

To collect and use the sulphuric acid of the salt cake consumed in the glass manufacture.

From Project Gutenberg