Abstract:
The service life of a conventional free fluoride ion sensitive electrode (20) can be improved by shielding the outer casing of the conventional electrode (20) against contact with the liquid composition in which the free fluoride ions concentration is to be measured, particularly when the solution is a hot acid solution containing surfactants and/or oxidizing agents, such as is normally used for cleaning aluminum beverage containers or providing a protective surface treatment to aluminum surfaces.
Abstract:
Apparatus for transferring liquid from a first tank (2) to a second tank having a supply line (4) coupled to the first tank, a fill line (6), a return line (10) leading to the first tank (2) or a sump, a pump (P1) switchable between a fill mode and a purge mode, and a programmable control for placing the apparatus in a purge mode in response to any one of the following signals, a signal indicating the fill line (6) is not properly attached to the second tank, a signal indicating that the liquid in the second tank has reached a given level, and a signal that the volume of liquid delivered by the pump (P1) is that which will fill the second tank to the given level. The programmable control detects leaks and checks whether the rate at which the pump (P1) delivers liquid is within a given range.
Abstract:
A system automated for providing at least periodic removal of metal ions and contaminants from a chemical bath (T4), consists of a microprocessor programmed for controlling fluid circuits of pumps (P1, P2, P3) and valves (AV1, AV2, AV3, AV4, AV5, AV6, AV7), for in one state of operation circulating a first predetermined quantity of the chemical bath from a first tank (T4), through an ion exchange column, and back to the first tank; for in a second state of operation circulating deionized water from a second tank (T1), into the IEX column for displacing residual chemical bath therefrom for return to the first tank; for in a third state of operation circulating deionized water through the IEX column, and discharging the rinse water from a waste port; for in a fourth state of operation circulating regenerant acid (T2) through the ion exchange column, and discharging the used acid from a waste port; for in a fifth state of operation circulating deionized water through the IEX column for rinsing acid regenerant therefrom and discharging the same out of a waste port; and for in a sixth state of operation circulating chemical bath into the IEX column for displacing residual rinse water therefrom, and discharging the same out of the waste port, in preparation for a cycle of treatment of the chemical bath.
Abstract:
A system automated for providing at least periodic removal of metal ions and contaminants from a chemical bath (T4), consists of a microprocessor programmed for controlling fluid circuits of pumps (P1, P2, P3) and valves (AV1, AV2, AV3, AV4, AV5, AV6, AV7), for in one state of operation circulating a first predetermined quantity of the chemical bath from a first tank (T4), through an ion exchange column, and back to the first tank; for in a second state of operation circulating deionized water from a second tank (T1), into the IEX column for displacing residual chemical bath therefrom for return to the first tank; for in a third state of operation circulating deionized water through the IEX column, and discharging the rinse water from a waste port; for in a fourth state of operation circulating regenerant acid (T2) through the ion exchange column, and discharging the used acid from a waste port; for in a fifth state of operation circulating deionized water through the IEX column for rinsing acid regenerant therefrom and discharging the same out of a waste port; and for in a sixth state of operation circulating chemical bath into the IEX column for displacing residual rinse water therefrom, and discharging the same out of the waste port, in preparation for a cycle of treatment of the chemical bath.