Abstract: Sulfonate-, sulfate-, or carboxylate-capped, alkoxylated anti-misting agents having the structure: R((AO)nX)m((AO)nH)p, and methods of suppressing mist from electrolyte solutions by adding a mist-suppressing amount of one or more compounds selected from the group consisting of compounds of the Formulas R((AO)nX)m((AO)nH)p and R3N+(CH3)2R4, and mixtures thereof, to electrolyte solutions.

Abstract: A multi-element cover system for controlling acid mist in metal electrowinning or electrorefining cells is made of an electrolyte resistant material and is applied above the surface of the electrolyte and below the electrical connections of the electrodes in order to provide a continuous and substantially airtight seal above the electrolyte.

Abstract: Sulfonate-, sulfate-, or carboxylate-capped, alkoxylated anti-misting agents having the structure: R((AO)nX)m((AO)nH)p, and methods of suppressing mist from electrolyte solutions by adding a mist-suppressing amount of one or more compounds selected from the group consisting of compounds of the Formulas R((AO)nX)m((AO)nH)p and R3N+(CH3)2R4, and mixtures thereof, to electrolyte solutions.

Abstract: Sulfonate- or sulfate-capped, alkoxylated anti-misting agents having the structures: R((AO)nX)m((AO)nH)p and R3C(O)NH(CH2)zN+(CH3)2CH2CHR4CH2SO3?, and to methods of suppressing mist from electrolyte solutions by adding a mist-suppressing amount of one or more of said compounds to electrolyte solutions.

Abstract: Sulfonate-, sulfate-, or carboxylate-capped, alkoxylated anti-misting agents having the structure: R((AO)nX)m((AO)nH)p, and methods of suppressing mist from electrolyte solutions by adding a mist-suppressing amount of one or more compounds selected from the group consisting of compounds of the Formulas R((AO)nX)m((AO)nH)p and R3N+(CH3)2R4, and mixtures thereof, to electrolyte solutions.

Abstract: Alkoxylated compounds of formula I R((AO)nH)mHp  (I) wherein each AO group is independently an alkyleneoxy group selected from ethyleneoxy, 1,2-propyleneoxy, 1,2-butyleneoxy, and styryleneoxy groups; n is an integer of from 2 to 100; m is an integer of from 1 to the total number of —OH plus —NH hydrogens in the R group prior to alkoxylation; the sum of m plus p equals the number of —OH plus —NH hydrogens in the R group prior to alkoxylation; and the R group is a group selected from the following: N(CH2CH2O)3  (II); R1N(CH2CH2O)2 where R1 is a C1-C24 alkyl, aryl, or aralkyl group  (III); R1N+(CH2CH2O)3Y− where R1 has the above meaning and  (IV) Y− is an anion, preferably an inorganic anion such as a halogen anion, a hydrogen sulfate anion, one-half of a sulfate anion, or one-third of a phosphate ion; NCH2CH2N  (V); NCH2CH2NCH2CH2N  (VI); CH3C(CH2O)3  (VII); CH3CH2C(CH2O)3  (VIII);

Abstract: An autonomous pushed liquid recirculation system (APLRS) is installed in a vessel, such as an electroplating tank. It situates around the interior perimeter and adjusts to changes in the level of liquid, maintaining the same location and orientation respective to the liquid's surface. It establishes a current near the surface that pushes liquid across the narrow horizontal dimension of the tank from a front wall to a rear wall. The current serves to push any bubbles resultant from operations within the tank to the rear wall. Over the rear wall is mounted an abbreviated exhaust hood covering only a short width of the surface of the tank along the rear wall. Because the exhaust system has to scavenge only a portion of the surface since all bubbles now burst along the rear wall, a much smaller air handling apparatus may be specified with an attendant savings in energy costs.

Abstract: A mist trap mechanism and method for a plating apparatus, which can provide an improved mist removing effect by a simple structure, are provided. A gas discharge passage is formed to connect the space in a plating chamber and space outside of the plating chamber and provided with a liquid spouting portion and a solid wall. The discharge gas collides with the liquid spouted from the liquid spouting portion, and the discharge gas collides with the solid wall which has its surface wetted with the liquid spouted from the liquid spouting portion. Such a two-staged collision of the discharge gas effectively takes the mist contained in the discharge gas into the liquid. A liquid recovery portion is disposed in connection with the gas discharge passage to collectively catch the mist in a state captured by the liquid.

Abstract: A mist trap mechanism and method for a plating apparatus, which can provide an improved mist removing effect by a simple structure, are provided. A gas discharge passage is formed to connect the space in a plating chamber and space outside of the plating chamber and provided with a liquid spouting portion and a solid wall. The discharge gas collides with the liquid spouted from the liquid spouting portion, and the discharge gas collides with the solid wall which has its surface wetted with the liquid spouted from the liquid spouting portion. Such a two-staged collision of the discharge gas effectively takes the mist contained in the discharge gas into the liquid. A liquid recovery portion is disposed in connection with the gas discharge passage to collectively catch the mist in a state captured by the liquid.

Abstract: An autonomous pushed liquid recirculation system (APLRS) is installed in a vessel, such as an electroplating tank. It situates around the interior perimeter and adjusts to changes in the level of liquid, maintaining the same location and orientation respective to the liquid's surface. It establishes a current near the surface that pushes liquid across the narrow horizontal dimension of the tank from a front wall to a rear wall. The current serves to push any bubbles resultant from operations within the tank to the rear wall. Over the rear wall is mounted an abbreviated exhaust hood covering only a short width of the surface of the tank along the rear wall. Because the exhaust system has to scavenge only a portion of the surface since all bubbles now burst along the rear wall, a much smaller air handling apparatus may be specified with an attendant savings in energy costs.

Abstract: Disclosed is a method for reducing metal acid or salt evolved from electrolytic baths housed in electrolytic tanks during electrolytic operations. This method involves covering all of the surface of the electrolytic bath with a layer of shredded foam (e.g., polymeric foam, metal foam, glass foam, or vitreous material foam). The shredded foam is irregular in shape, lacking in uniform particle size, is inert to the electrolytic operation, and floats at the surface of the electrolytic bath. Desirably, the layer of shredded foam is about 3 to 4 inches (76-102 mm) in thickness. Examples of specific processes benefiting from the present invention are anodizing, electroplating, electrowinning, and electrophoresis operations.

Abstract: An electrolytic processing tank contains alternating cathodes and anodes. Each anode carries a sealing unit on either side thereof. The sealing units include flexible U-shaped sealing members which are in surface contact with neighboring cathodes. A sealing member which is T-shaped as seen in an end view is positioned adjacent the end of each anode. Each T-shaped member has a leg whose thickness is the same as that of the anodes, and a crosspiece which extends partway along the leg. The leg is aligned with a neighboring anode, and the end of the leg remote from the crosspiece abuts the anode. The crosspiece projects beyond the opposite end of the leg to form a flexible flap which establishes a seal with a wall of the processing tank. The crosspieces of neighboring T-shaped members overlap one another.

Abstract: This invention relates to the use of spray mist inhibitors in basic electrolysis bath processes.

Abstract: There is disclosed a gas treatment method and apparatus for the treatment of exhaust gas from an electrochemical plating operation, particularly from a chromium plating operation, to remove therefrom essentially all liquid entrainment. The invention comprises containment of the vapor space over the electroplating baths and evacuating the contained vapor space, passing the gases from the vapor space through a water bath and discharging the gases from the water bath through a mist separator and a sub-micron porous filter. Preferably the mist separator and porous filter are separated by a vapor space to permit coalesced droplets to condense and separate from the gases before passing the gases through the porous filter.

Abstract: A chrome plating facility having a chrome recovery system into which chrome bearing mist, swept from a chrome plating solution surface, is directed. The system comprises a chrome removal system and a chrome reclamation system. The removal system comprises structure defining surfaces for collecting chrome from the vapor flowing through the station, a second chrome removal station downstream from the first removal station and comprising second structure defining surfaces for collecting chrome from fluid flowing through the second station. The reclamation system recovers chrome from the removal system and comprises a solvent reservoir, solvent recirculating means for directing reservoir solvent onto the second chrome removal station surfaces for removing chrome therefrom and returning the solvent and chrome to the reservoir.

Abstract: A low mist chromium plating system is disclosed which comprises a closed plating tank containing chromium plating solution preferably covered by a layer of mist suppressing foam. Nitrogen carrier gas is introduced into the plating tank above the plating solution and carries chromium mist to a series of aqueous traps. The first trap contains sodium bisulfite for reducing hexavalent chromium ions to trivalent chromium ions. The last trap contains 1,5-diphenylcarbohydrazide for indicating the presence of hexavalent chromium.