Solid coolant concentrates and production thereof

A method of reducing emissions, the method comprising:

• producing a solid composition at a first site, which is thence transported to a second site where the solid composition is used to produce a superconcentrate and/or concentrate by mixing with alkylene glycol, alkylene glycol monoalkyl ether, and glycerol (B),
• wherein the solid composition is a nitrite-free solid composition suitable for production of liquid antifreezes for coolant systems with anticorrosive action, the composition comprising:
• not more than 10% by weight of water (A),
• not more than 10% by weight of alkylene glycol, alkylene glycol monoalkyl ethers, and glycerol (B),
• as inhibitors (C):
• (C1) at least one inorganic compound selected from the group consisting of silicates, borates, nitrates, molybdates, and phosphates,
• (C2a) optionally, benzoic acid as aromatic monocarboxylic acid,
• (C3) at least one organic dicarboxylic acid having 4 to 20 carbon atoms,
• (C4) at least one azole,
• (D) optionally, at least one inorganic base,
• (E) at least one other constituent selected from the group consisting of hard water stabilizers, defoamers, dyes, and bitter substances,
• with the proviso that
• a total proportion of the inhibitor components (C), inorganic base components (D), and other components (E), based on the overall composition, is 90% to 95% by weight,
• a proportion of aliphatic monocarboxylic acids in the overall composition does not exceed 1% by weight,
• a proportion of nitrites in the overall composition does not exceed 0.25% by weight, and
• a sum total of all components is always 100% by weight.