Abstract: A method and system for batch manufacturing aluminum chlorohydrate (ACH) utilizing a reactor tank. The method comprises conducting two consecutive batch manufacturing processes, each batch manufacturing process producing aluminum chlorohydrate (ACH) by reacting solid-state aluminum metal pieces with an acid source in a reactor tank. Proximate the end of a first of the two batch manufacturing processes, after the aluminum chlorohydrate (ACH) being produced in that batch has reached a predetermined basicity level, a majority of the produced aluminum chlorohydrate (ACH) is withdrawn from the reactor tank but a heel-portion of the produced aluminum chlorohydrate (ACH) is retained in the reactor tank. The heel-portion comprises a sufficient amount of the produced aluminum chlorohydrate (ACH) to submerge therein a majority of unreacted solid-state aluminum metal pieces retained in the reactor tank at the time that produced aluminum chlorohydrate (ACH) is withdrawn from the reactor tank.

Abstract: A method is provided for the production of a stable mid- and high-basicity polyaluminum chloride and polyaluminum chlorosulfate, respectively from sodium aluminate and aluminum chloride or low- or mid-basicity polyaluminum chloride by ultrasonic processing of the reactants. The method overcomes the formation of gels and insoluble precipitates that typically form when mixing sodium aluminate and aluminum chloride and the formation of sodium chloride, which is insoluble in high concentration polyaluminum chloride solutions. The invention eliminates the cumbersome extended heating periods previously required to deal with the formation of insoluble aluminum oxide precipitates in batches of polyaluminum chloride produced from sodium aluminate and aluminum chloride using high-shear mixing.

Abstract: A process is provided whereby a liquid ferrous sulfate or ferrous chloride solution containing 0.5-100% of the iron in the ferrous form (Fe2+) is oxidized in a continuous process using an ozone gas stream as an oxidant. The invention has advantages over prior art in that the process does not require additional elevated pressures (>1 atm), elevated temperatures, or additional liquid oxidant, and can be run in a continuous, rather than a batch process.