Technische Universiteit Delft

Akzo Nobel N.v.

Gerda Maria Van Rosmalen

Geert-Jan Witkamp

Harald Oosterhof

Johannes Albertus Maria Meijer

Johannes De Graauw

Robert Michael Geertman

Antonius E Van Der Der Heijden

Marielle G Van Der Horst

Process for the production of sodium carbonate anhydrate

A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m . The process is characterized in that a solvent is used that allows the crystals to be formed and handled at atmospheric pressure in the presence of water without the monohydrate of soda being formed.

Production of water-free soda

A composition comprising ammonium thiocyanate and an amount of an anti-caking agent selected from amines and amine salts, which is effective to reduce the caking of the ammonium thiocyanate, is disclosed. Also disclosed is a method for reducing the caking of a composition which contains ammonium thiocyanate which comprises the step of incorporating in said composition, 0.0001-1.0% by weight, based on the weight of the ammonium thiocyanate, of an anti-caking agent selected from amines and amine salts and the use of a compound selected from amines and amine salts, as an anti-caking agent for ammonium thiocyanate. It has surprisingly been found that minor amounts of these anti-caking agents provide an excellent reduction in the caking of ammonium thiocyanate compositions.

Anti-caking agents for ammonium thiocyanate

Growing community of inventors

Delft, Netherlands

Gerda Maria Van Rosmalen