Abstract: A method of recovering ammonia by the distillation of an aqueous solution containing ammonia, carbon dioxide and hydrogen cyanide. The distillation is conducted using a distillation apparatus having at least its portion which comes into contact with the aqueous solution made of an alloy 1 or alloy 2. The alloy 1 contains 3% by weight or more of molybdenum, 15% by weight or more of nickel and 15% by weight or more of chromium. The alloy 2 contains 1% by weight or more of molybdenum, 9% by weight or less of nickel and 20% by weight or more of chromium. The use of the alloy 1 or alloy 2 prevents the corrosion of the distillation apparatus and enables the stable recovery of ammonia for a long period of time.

Abstract: A corrosion inhibitor pigment composition is based a solid solution of (Ni.sup.2+ +Co.sup.2+)-bis-hydrogen cyanamide.

Abstract: A method of preparing a (Me)bis-hydrogen cyanamide composition with enhanced corrosion preventive activity, wherein Me is a divalent metal selected from the group consisting of nickel and cobalt or mixtures thereof. The method includes precipitating Ni(OH).sub.2 or Co(OH).sub.2 or mixtures thereof, in situ in a liquid reaction medium, containing a soluble cobalt or nickel salt and sodium hydroxide and a stoichiometric excess of H.sub.2 NCN and immediately reacting the resultant precipitate with H.sub.2 NCN. Precipitation of coprecipitated pigment compositions including the aforementioned derivatives and zinc cyanamide is also disclosed.

Abstract: A process for producing cyanamide from lime nitrogen, which comprises dispersing lime nitrogen in an organic liquid containing an aliphatic alcohol having 1 to 3 carbon atoms, and blowing carbon dioxide gas into the dispersion.

Abstract: Monosodium cyanamide is suspended in chemically and physically stable form in certain, high-boiling ether alcohols corresponding to the following formula ##STR1## The suspensios are an easy-to-handle, meterable form of NaHNCN in which it may be used both as a starting material for chemical syntheses and as an activator for peroxidic bleaches.

Abstract: The present invention relates to a process for the preparation of solid sodium hydrogen cyanamide by reacting cyanamide with sodium hydroxide in aqueous solution, the aqueous solution or suspension containing sodium hydrogen cyanamide being concentrated to dryness with the aid of a drier device which uses heating gases, preferably, a spray drier or atomization drier, and, if appropriate, the product then being dried. A pulverulent product with good flow properties, purity and storage stability is thereby obtained in an industrially simple manner.

Abstract: The storage stability of strong or concentrated, aqueous solutions of cyanamide, even those conventionally stabilized with acid, is enhanced by small amounts of lower alkyl esters of carboxylic acids having preferably a pK.sub.a.sup.25.degree. value of 3.8 or less.