As a result, an ammonium ion and a salt of the polyurethane are formed.

The ammonium ion is the result of nitrogen mineralisation.

The present invention relates to ionic liquid comprising an anion and a cation wherein the cation is a primary, secondary or tertiary ammonium ion containing a protonated nitrogen atom.

Further neutralization of the leach slurry in the presence of an alkali metal or ammonium ion will allow the precipitation of iron-bearing jarosite at ambient pressure.

The phthalocyanine comprises one or more sulfonate groups and a counterion of at least one sulfonate group is an ammonium cation comprising at least 15 carbon atoms.

A concentrated aqueous solution of ADN is reacted with a concentrated aqueous solution of an organic salt, whose anion is OH- or CO¿3?2- which is capable of taking up a proton from the ammonium ion of ADN and transferring said ion to ammonia.

In many cases, the cation is an ammonium ion from an amino group; the anion may be from a carboxylic acid.

The zeolite is heated to a temperature and for a period of time sufficient to increase the selectivity of the zeolite for ammonium ion without substantially reducing the capacity of the zeolite for ammonium ion.

The ambient temperature molten salt is, for example, a tertiary or quaternary ammonium salt comprising a tertiary or quaternary ammonium cation and a fluorine atom-containing anion.