Abstract

The present invention relates to the recovery of high purity litharge from spent lead acid battery paste at a low temperature which does not produce sulfur dioxide. In the process lead acetate or other lead salt is produced which is converted to high purity litharge by precipitation with a base.

IPC Classes  ?

• C22B 13/00 - Obtaining lead
• C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes

Abstract

High purity MnO and zinc oxide may be efficiently recovered from alkaline and/or carbon zinc batteries using a process involving the treatment of the crushed batteries with an alkali hydroxide to produce insoluble manganese oxides and an alkali zincate solution. Zinc oxide is obtained by reacting the zinc solution with carbon dioxide or an acid such as a mineral acid and furnacing. The manganese oxides are converted to MnO by furnacing under an inert atmosphere.

IPC Classes  ?

• C01G 45/02 - Oxides; Hydroxides
• C01G 9/02 - Oxides; Hydroxides
• H01M 6/52 - Reclaiming serviceable parts of waste cells or batteries
• H01M 4/50 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
• H01M 4/48 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides

Abstract

The present invention related to a method for the recycling of batteries by recovering and regenerating the cathode material. The method includes the steps of isolating the cathode particles and then regenerating the cathode particles for use in the same type of battery.

IPC Classes  ?

• B02C 11/08 - Cooling, heating, ventilating, conditioning with respect to temperature or water content
• H01M 10/54 - Reclaiming serviceable parts of waste accumulators
• B02C 23/18 - Adding fluid, other than for crushing or disintegrating by fluid energy
• B02C 13/00 - Disintegrating by mills having rotary beater elements
• B02C 21/00 - Disintegrating plant with or without drying of the material

Abstract

The invention relates to the recovery of manganese dioxide, zinc hydroxide/oxide and steel from metal cased alkaline dry cell batteries which have been wet crushed. There is also a process for recovery of the steel and high purity manganese dioxide which can be directly utilized in the electrode for alkaline dry cell batteries.

IPC Classes  ?

• C01G 45/00 - Compounds of manganese

Abstract

5 alloy and still containing the lanthanum metal.

IPC Classes  ?

• C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
• C22B 59/00 - Obtaining rare earth metals

Abstract

The invention relates to the low temperature recovery of lead oxide (PbO) from lead acid battery paste through the preparation of lead carboxylate from the battery paste and the conversion of the lead carboxylate to PbO.

IPC Classes  ?

• C01G 17/02 - Germanium dioxide
• C01G 19/02 - Oxides

Abstract

The present invention provides a process for recovery of copper, aluminum, carbon and cathode material from spent lithium ion batteries having lithium metal oxide cathode material. The cathode material which is recovered can be regenerated with lithium hydroxide and reused as cathode material.

IPC Classes  ?

• B02C 19/00 - Other disintegrating devices or methods
• B02C 21/00 - Disintegrating plant with or without drying of the material

Abstract

The present invention relates to a process for recycling alkaline batteries to recover metals and zinc and manganese compounds. The process provides for the separation of metal pieces and the chemical separation and recovery of zinc and manganese compounds.

IPC Classes  ?

• H01M 6/52 - Reclaiming serviceable parts of waste cells or batteries
• H01M 10/54 - Reclaiming serviceable parts of waste accumulators

Abstract

The present invention relates to the recovery of high purity litharge from spent lead acid battery paste at a low temperature which does not produce sulfur dioxide. In the process lead acetate is produced which is converted to pure litharge.

IPC Classes  ?

• C22B 13/00 - Obtaining lead

Abstract

2.

IPC Classes  ?

• C22B 13/00 - Obtaining lead

Abstract

5 alloy.

IPC Classes  ?

• C22B 23/00 - Obtaining nickel or cobalt
• C01F 7/00 - Compounds of aluminium

Abstract

2 from lighter small particles.

IPC Classes  ?

• C22B 9/00 - General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
• C01F 17/00 - Compounds of rare earth metals

Abstract

A process for producing high purity lead oxide from impure lead compounds particularly from waste lead battery paste which includes an oxidation-reduction step. The process results in a reduction of impure lead compounds to the +2 valence state and metal particle contaminants are oxidized to the +2 state.

IPC Classes  ?

• C01G 21/02 - Oxides

Abstract

A process for recovering lead oxides from the spent paste of exhausted lead acid batteries. The process provides heating the spent paste with an alkali hydroxide solution at elevated temperatures prior to calcinations. Calcination is at various temperatures so that either lead mono-oxide, lead dioxide or red lead is obtained as the principal product. There is also provided the use of the lead oxide to prepare the paste for positive and negative electrodes or other lead compounds.

IPC Classes  ?

• H01M 6/50 - Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
• H01M 4/82 - Multi-step processes for manufacturing carriers for lead-acid accumulators
• C01G 21/02 - Oxides
• C01G 21/10 - Red lead (Pb3O4)
• C22B 13/00 - Obtaining lead
• C22B 13/02 - Obtaining lead by dry processes
• C22B 13/06 - Refining
• C22B 13/08 - Separating metals from lead by precipitating, e.g. by Parkes process
• C01G 21/04 - Lead suboxide (Pb2O)
• C01G 21/06 - Lead monoxide (PbO)
• C01G 21/08 - Lead dioxide (PbO2)