Method for the production of alumina trihydrate crystals from the stream of a process of recovery of alumina trihydrate.

disclosed herein is a method for the production of alumina trihydrate crystals from the stream of a process of recovery of trihydrate alumina, wherein an aqueous emulsion comprising an alkyl or alkenyl succinic anhydride is added to the current process recovery of alumina trihydrate in the aqueous emulsion is substantially free of mineral oils. The method provides a reduction of the percentage of alumina trihydrate crystals having a volume average diameter of less than about 45 micrometers, compared to the percentage of alumina trihydrate crystals produced in the absence of an aqueous emulsion of an anhydride alkyl- or alkenylsuccinic.