What is the role of silicate in soap?
Sodium metasilicate pentahydrate or granular anhydrous, for concentration and crystallization or for drying the solution of silicate of sodium with R=1. Mainly used to produce soaps and detergents. Zeolites, by reaction of silicate sodium with sodium aluminate.
Sugar is another optional ingredient that helpsto augment the amount of foam that the soap will produce.
Since sodium silicate is inexpensive and available in abundance, it has been used in many refractory applications. Sodium silicate has interesting expansive and incombustibility properties for certain uses against fire damage.
Sodium silicate is stable in neutral or alkaline pH solution. In an acid solution, silicate ion reacts with hydrogen ions to form silicic acid, which when heated and roasted forms silica gel, a hard, glassy substance.
When passing through high temperature machines, the sodium silicate polymerizes and firmly bonds the sheets of paper together; in food, as a food additive, then regulated under the number E550, as an anti-caking agent and – at the beginning of the 20th century with great success – for the preservation of eggs.
Properties. Sodium silicate is a white powder that is very soluble in water, producing an alkaline solution. It is one of a family of related compounds including sodium orthosilicate, Na 4 SiO 4, pyrosilicate, sodium sodium Na 6 Si 2 O 7 and other related compounds, all of which are glassy, highly alkaline,.. .