Abstract

Processes, compositions and kits are provided for suppressing generation of acid mist in an electrowinning process. The processes include the step of adding a powder of lignosulfonate or a derivative thereof or an aqueous solution comprising lignosulfonate or a derivative thereof to an electrolytic solution of the electrowinning process in an amount sufficient to suppress generation of acid mist without formation of foam at an upper surface of the electrolytic solution. The kits include instructions for carrying out the processes.

IPC Classes  ?

• C25C 7/06 - Operating or servicing
• C25C 1/12 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper

Abstract

A composition for suppressing generation of acid mist in an electrowinning process. The composition includes about 1.5% to about 20% (m/m) of a C2 to C6 organic acid, about 15% to about 35% (m/m) of a diphenyl oxide disulfonate or diphenyl oxide sulfonic acid compound; and about 20% to about 30% (m/m) of a plant root extract containing a triterpenoid saponin. Methods for preparing the composition and using the composition in an electrowinning process are also described.

IPC Classes  ?

• C25C 1/00 - Electrolytic production, recovery or refining of metals by electrolysis of solutions

Abstract

Processes, compositions and kits are provided for suppressing generation of acid mist in an electrowinning process. The processes include the step of adding a powder of lignosulfonate or a derivative thereof or an aqueous solution comprising lignosulfonate or a derivative thereof to an electrolytic solution of the electrowinning process in an amount sufficient to suppress generation of acid mist without formation of foam at an upper surface of the electrolytic solution. The kits include instructions for carrying out the processes.

IPC Classes  ?

• C25C 7/06 - Operating or servicing
• B01J 19/16 - Preventing evaporation or oxidation of non-metallic liquids by applying a floating layer, e.g. of microballoons
• C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
• C25C 1/00 - Electrolytic production, recovery or refining of metals by electrolysis of solutions

Abstract

266 organic acid, about 15% to about 35% (m/m) of a diphenyl oxide disulfonate or diphenyl oxide sulfonic acid compound; and about 20% to about 30% (m/m) of a plant root extract containing a triterpenoid saponin. Methods for preparing the composition and using the composition in an electrowinning process are also described.

IPC Classes  ?

• C25C 7/06 - Operating or servicing
• A62D 3/30 - Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
• B08B 15/00 - Preventing escape of dirt or fumes from the area where they are producedCollecting or removing dirt or fumes from that area
• C23F 11/04 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
• C25C 1/00 - Electrolytic production, recovery or refining of metals by electrolysis of solutions
• C25C 1/08 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of nickel or cobalt
• C25C 1/12 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
• C09K 3/00 - Materials not provided for elsewhere
• C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
• C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds