Process for recovery of zinc from solutions that contain it as a result of extraction with solvents for their adaptation to electrolysis

Claim 2

PROCESS FOR PREPARATION OF ZINC FOR ELECTROLYTIC DEPOSITION FROM SOLUTIONS CONTAINING ZINC AND CHLORIDE IONS BY A TWO-CYCLE EXTRADITION, THE FIRST CYCLE OF WHICH INCLUDES, ADJUSTING THE CHLORIDE SOLUTION TO AT LEAST 1.3M, EXTRACTING ZINC FROM SAID SOLUTION BY MEANS OF AN ORGANIC SOLUTION INCLUDING AT LEAST ONE MEMBER OF A CLASS OF EXTRACTING AGENTS SELECTED FROM AN AMINE OR A QUATERNARY AMMONIUM COMPOUND OF MINIMAL SOLUBILITY IN WATER, SAID AGENTS USED IN COMBINATION WITH A COMPATIBLE ORGANIC DILUENT TO SERVE AS A CARRIER AND VISCOSITY REDUCER FOR SAID EXTRACTING AGENT, AND RE-EXTRACTING WITH AN AQUEOUS SOLUTION TO OBTAIN A ZINC ENTICHED SOLUTION; AND A SECOND CYCLE INCLUDING; EXTRACTING THE ZINC ENRICHED AQUEOUS SOLUTION OF THE FIRST CYCLE FROM WHICH MORE REACTIVE METAL CATIONS HAVE BEEN REMOVED, WITH A HIGH MOLECULAR WEIGHT ORGANIC ACID IN ADMIXTURE WITH A DILUENT CARRIER SAID DILUENT PRESENT TO REDUCE VISCOSITY; RE-EXTRACTING WITH AN AQUEOUS SOLUTION CONTAINING SULPHATE IONS TO PREPARE AN ELECTROLYTIC SOLUTION FOR ZINC DEPOSITION.

Claim 3

The process of claim 1 in which a washing step is carried out after the organic extraction of the first cycle.

Claim 4

Process of claim 1 in which a washing step is carried out after the organic extraction of the second cycle.

Claim 5

Process of claim 1 in which the zinc solution of the first cycle contains between 1.5 and 2M chloride ions.

Claim 6

Process of claim 1 In which the organic phase of solvent used in the first cycle has alkyl chain with a molecular weight above 200.

Claim 7

Process of claim 1 in which a modifier consisting of an alcohol with 8-14 carbon is added to the organic extraction phase of the first cycle.

Claim 8

The process of claim 1 in which organic extraction solvent of the second cycle contains at least one member of a class consisting of alcohols containing 8-14 carbon atoms and phosphated alkyl esters.

Claim 9

Process for claim 1 in which the organic acids used in the second cycle is at least one member of the group consisting of petroleum derivative carboxylic acids, halogenated fatty acids, fatty carboxylic acids and alkyl phosphoric acids.

Claim 10

Process of claim 1 in which the extraction in the second cycle is carried out under controlled pH by adding a soluble alleate to neutralize the acid not later than during the extraction.

Claim 11

Process for preparation of zinc for electrolytic deposition from solutions containing zinc and chloride ions by a two-cycle extraction comprising a first cycle including the steps of preparing a solution containing zinc and chloride ions in which the chloride ions are present in a concentration of from 1.5-2M; extracting zinc from said solution by an organic solution including at least one member of a class of extracting agents selected from an amine or a quaternary ammonium compound of minimal solubility in water and having large alkyl chains with said compound having a molecular weight greater than 200, and a compatible organic diluent to serve as a carrier and viscosity reducer for said extracting agent; washing said solution; and re-extracting with an aqueous solution to obtain a zinc enriched solution; and a second cycle including; extracting the enriched aqueous solution of the first cycle with high molecular weight organic acids in a diluent carrier and viscosity reducing agents; washing the solution; and re-extracting with an aqueous solution containing sulphate ions to prepare an electrolytic solution for zinc deposition.

Claim 12

Process for preparation of zinc for electrolytic deposition from solutions containing zinc and chloride ions by a two-cycle extraction comprising a first cycle including the steps of preparing a solution containing zinc and chloride ions in which the chloride ions are present in a concentration of from 1.5-2M; extracting zinc from said solution by an organic solution including at least one member of a class of extracting agents selected from an amine or a quaternary ammonium compound of minimal solubility in water and having large alkyl chains with said compound having a molecular weight greater than 200, and a compatible organic diluent to serve as a carrier and viscosity reducer for said extracting agent; washing said solution; and re-extracting with an aqueous solution to obtain a zinc enriched solution; and a second cycle including; extracting the enriched aqueous solution of the first cycle with high molecular weight organic acids in a diluent carrier and viscosity reducing agents; washing the solution; and re-extracting with an aqueous solution containing sulphate ions to prepare an electrolytic solution for zinc deposition.

Claim 13

Process for preparation of zinc for electrolytic deposition of solutions containing zinc and chloride ions by a two-cycle extraction comprising a first cycle including; preparing a solution containing zinc and chloride ions; extracting zinc from said solution by organic solutions including at least one member of a class of extracting agents selected from an amine or a quaternary ammonium compound of minimal solubility in water in conjunction with a compatible organic diluent to serve as a carrier and viscosity reducer and an alcohol with 8-14 carbon atoms; and extracting with an aqueous solution to obtain a zinc enriched solution; and a second cycle including; extracting the enriched aqueous solution of the first cycle with high molecular weight organic acids, and at least one member of the class consisting of alcohols containing 8-14 carbon atoms and phosphated alkyl esters and a diluent carrier to reduce viscosity; re-extracting with an aqueous solution containing sulphate ions to prepare an electrolytic solution for zinc deposition.

Claim 14

Process for preparation of zinc for electrolytic deposition of solutions containing zinc and chloride ions by a two-cycle extraction comprising a first cycle including; preparing a solution containing zinc and chloride ions; extracting zinc from said solution by organic solutions including at least one member of a class of extracting agents selected from an amine or a quaternary ammonium compound of minimal solubility in water in conjunction with a compatible organic diluent to serve as a carrier and viscosity reducer and an alcohol with 8-14 carbon atoms; and extracting with an aqueous solution to obtain a zinc enriched solution; and a second cycle including; extracting the enriched aqueous solution of the first cycle with high molecular weight organic acids, and at least one member of the class consisting of alcohols containing 8-14 carbon atoms and phosphated alkyl esters and a diluent carrier to reduce viscosity; re-extracting with an aqueous solution containing sulphate ions to prepare an electrolytic solution for zinc deposition.