Abstract:
In processes for reducing the dissolved inorganic and organic impurities in aqueous lyes in the Bayer process for the manufacture of aluminium hydroxide, the additives used entail cost-intensive process controls and increased lye consumption, thereby raising production costs without necessarily ensuring product quality. These drawbacks may be eliminated by subjecting the impure lye Pv to electrodialysis using at least one anion-permeable membrane and/or one cation-permeable membrane and at least one bipolar water-dissociating membrane with formation of an alkaline lye component Pr which is added to the circulating lye in the Bayer process, and an impurity component V which is removed from the process and discarded.
Abstract:
A fuel tank valve apparatus includes a fuel tank (10) having an inlet neck (12) defining a valve chamber (24), a valve housing (30) positioned in the valve chamber, a valve (32) positioned to move within the valve housing (24) to regulate flow of liquid fuel into the fuel tank (10), and a retainer (29). The retainer (29) serves to couple the valve housing to the inlet neck for retaining the valve housing (30) in the inlet neck (12) and maintaining the integrity of the tank (10) and inlet material.