Methods for removing sulfate from a battery electrode, methods for refurbishing batteries, methods of depositing a film on a battery electrode, and refurbished batteries are described. Methods for removing sulfate from a batter electrode include placing the battery electrode in a chelate solution to solubilize the sulfate and remove sulfate deposits from the battery electrode. Methods further include performing electrodeposition of a metal film on a battery electrode using chelate-metal solution resulting from the soaking process.

Methods for removing sulfate from a battery electrode, methods for refurbishing batteries, methods of depositing a film on a battery electrode, and refurbished batteries are described. Methods for removing sulfate from a batter electrode include placing the battery electrode in a chelate solution to solubilize the sulfate and remove sulfate deposits from the battery electrode. Methods further include performing electrodeposition of a metal film on a battery electrode using chelate-metal solution resulting from the soaking process.

The invention related to a method for extracting tin and/or lead contained in an electrically conductive mixture derived from waste, using a solution comprising methane sulphonic acid as an electrolytic solution.

The invention related to a method for extracting tin and/or lead contained in an electrically conductive mixture derived from waste, using a solution comprising methane sulphonic acid as an electrolytic solution.

The invention related to a method for extracting tin and/or lead contained in an electrically conductive mixture derived from waste, using a solution comprising methane sulphonic acid as an electrolytic solution.

The present invention relates to an electroplating bath comprising (A) an alkane sulfonic acid or alkanol sulfonic acid; (B) a soluble metal salt of alkane sulfonic acid or alkanol sulfonic acid; and (C) at least one additive selected frompolyether derivatives of formula (I),sulfonated or sulfated polyether derivatives of formula (II) orany combinations thereof, wherein the groups in formulae (I) and (II) are as defined in the description and claims. The present invention also relates to a process for refining metal and a process for controlling morphology of metal deposited on cathode in electrolytic refining of the metal, which comprise using the electroplating bath according to the present invention.

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The present invention relates to an electroplating bath comprising (A) an alkane sulfonic acid or alkanol sulfonic acid; (B) a soluble metal salt of alkane sulfonic acid or alkanol sulfonic acid; and (C) at least one additive selected frompolyether derivatives of formula (I),sulfonated or sulfated polyether derivatives of formula (II) orany combinations thereof, wherein the groups in formulae (I) and (II) are as defined in the description and claims. The present invention also relates to a process for refining metal and a process for controlling morphology of metal deposited on cathode in electrolytic refining of the metal, which comprise using the electroplating bath according to the present invention.

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The present invention relates to an electroplating bath comprising (A) an alkane sulfonic acid or alkanol sulfonic acid; (B) a soluble metal salt of alkane sulfonic acid or alkanol sulfonic acid; and (C) at least one additive selected frompolyether derivatives of formula (I),sulfonated or sulfated polyether derivatives of formula (II) orany combinations thereof, wherein the groups in formulae (I) and (II) are as defined in the description and claims. The present invention also relates to a process for refining metal and a process for controlling morphology of metal deposited on cathode in electrolytic refining of the metal, which comprise using the electroplating bath according to the present invention. ##STR00001##

The present invention relates to an electroplating bath comprising (A) an alkane sulfonic acid or alkanol sulfonic acid; (B) a soluble metal salt of alkane sulfonic acid or alkanol sulfonic acid; and (C) at least one additive selected frompolyether derivatives of formula (I),sulfonated or sulfated polyether derivatives of formula (II) orany combinations thereof, wherein the groups in formulae (I) and (II) are as defined in the description and claims. The present invention also relates to a process for refining metal and a process for controlling morphology of metal deposited on cathode in electrolytic refining of the metal, which comprise using the electroplating bath according to the present invention. ##STR00001##