Over the next few months were going to be publishing a complete guide to this mysterious liquid and how it will affect you, your car and your wallet/ can there’s no better place to start than with the letter......A
A is for (obviously) Adblue®
Over the coming weeks we’re going to be giving you a complete A-Z rundown of this mysterious liquid they call AdBlue and there’s no better place to start than with the letter …..A
AdBlue is not Blue.
It is a colourless liquid.
AdBlue is not made from pigs wee.
However, AdBlue IS made up of a synthetic reproduction of a very common liquid ‘Urea’, the main nitrogen-containing substance in the urine of mammals.
Urea was the first ever organic compound to be synthetically formulated.
Way back in 1773, Hilaire Marin Rouelle a French chemist isolated the crystalline substance and six years later (why it took so long I don’t know) Antoine François de Fourcroy and Louis Nicolas Vauquelin came up with the name ‘Urea’.
It was some time later in 1828, when German chemist Friedrich Wöhler heated a solution consisting of a mixture of silver cyanate (AgOCN) and ammonium chloride (NH4Cl).
This formed ammonium cyanate, a substance that when heated more became a clear, colourless crystalline urea which has the same characteristics as urinary urea.
Fast-forward to today
The commercial production of synthetic urea now involves the reaction of ammonia and carbon dioxide under high pressure (approximately 150 atm) and at high temperature (approximately180°C).
The product, ammonium carbamate (CO2NH4NH2), is then dehydrated to produce urea (Carey 1992; Myers 2007). A summary reaction is shown below:
2NH3 + CO2 -----> CO2NH4NH2 -----> CO(NH2)2 + H2O
Many thanks to www.cropsreview.com for the technical information
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