Powergenix Systems, Inc.

Calera Corporation

Plurion Limited

Simbol, Inc.

Aqua Metals Inc.

Zincfive Power, Inc.

Geothermal Energy Project, LLC

Plurion Systems, Inc.

Applied Intellectual Capital Limited

Plurion Limited Company

Samaresh Mohanta

Stephen Harrison

Jeffrey Owen Phillips

Robert Lewis Clarke

Brian Dougherty

Ryan J Gilliam

Zeiad M Muntasser

J Peter Millington

Thomas H McWaid

Michael Kostowskyj

Hong Zhao

Cecilia Maske

Jeff Barton

Feng Feng

Deepan Chakkaravarthi Bose

Peter J Millington

Elizabeth Geler

Alexander A Gorer

Margarete K Leclerc

Michael Joseph Weiss

Kyle Self

Bryan Boggs

Chi Wang Yau

James J Wu

John Hunter Miller

C V Krishnamohan Sharma

Jason Zhao

Zheng Fan

Mingming Geng

Bryan L McKinney

Lou Uzel

Brian C Dougherty

Richard H Clarke

Bernd Busse

Brian J Dougherty

Cv Krishnamohan Sharma

Joshua Hufford

Zhen Gang Fan

Scott Stevenson

Ernest M Rimanosky

Sean Clinton

Franz Josef Kruger

Ru Jun Ma

Cecelia Maske

Brian James Dougherty

Zheng Gang Fan

Lou Ludek Uzel

Lead is recovered from lead paste of a lead acid battery in a continuous and electrochemical lead recovery process. In especially preferred aspects, lead paste is processed to remove residual sulfates, and the so treated lead paste is subjected to a thermal treatment step that removes residual moisture and reduces lead dioxide to lead oxide. Advantageously, such pretreatment will avoid lead dioxide accumulation and electrolyte dilution.

Systems and methods for aqueous recovery of lead from lead acid batteries with reduced electrolyte demand

Lead is recycled from lead paste of lead acid batteries in a process that employs alkaline desulfurization followed by formation of plumbite that is then electrolytically converted to pure lead. Remaining insoluble lead dioxide is removed from the lead plumbite solution and reduced to produce lead oxide that can be fed back to the recovery system. Sulfate is recovered as sodium sulfate, while the so produced lead oxide can be added to lead paste for recovery.

Systems and methods for continuous alkaline lead acid battery recycling

Lead is recovered from lead paste of a lead acid battery in a continuous process. The lead paste is contacted with a base to generate a supernatant and a precipitate. The precipitate is separated from the supernatant, and is contacted with an alkane sulfonic acid to generate a mixture of lead ion solution and insoluble lead dioxide. The lead dioxide is reduced with a reducing agent to form lead oxide, and the lead oxide is combined with the lead ion solution to form a combined lead ion solution to so allow a continuous process without lead dioxide accumulation. Lead is recovered from the combined lead ion solution using electrolysis.

Systems and methods for recovery of lead from lead acid batteries

Disclosed herein are ion exchange membranes, electrochemical systems, and methods that relate to various configurations of the ion exchange membranes and other components of the electrochemical cell.

Ion exchange membranes, electrochemical systems, and methods

The conductivity of a zinc negative electrode is enhanced through use of surfactant-coated carbon fibers. Carbon fibers, along with other active materials such as bismuth oxide, zinc etc., form an electronically conductive matrix in zinc negative electrodes. Zinc negative electrodes as described herein are particularly useful in nickel zinc secondary batteries.

Carbon fiber zinc negative electrode

Electrochemical systems and methods

There are provided methods and systems for an electrochemical cell including an anode and a cathode where the anode is contacted with a metal ion that converts the metal ion from a lower oxidation state to a higher oxidation state. The metal ion in the higher oxidation state is reacted with hydrogen gas, an unsaturated hydrocarbon, and/or a saturated hydrocarbon to form products.

Systems and methods for preparation and separation of products

A method for the selective precipitation and recovery of manganese from a manganese containing solution, such as a geothermal brine is provided, wherein the geothermal brine is contacted with ammonia, an ammine, or ammonium salt at a pH of greater than about 8.0 to selectively precipitate manganese having a purity of at least about 95%. Also provided are methods for the selective recovery of manganese and zinc from a brine solution.

Separation of manganese from brine

This invention relates to a method for the selective recovery of zinc from geothermal brines, and the subsequent preparation of zinc chloride or zinc sulfate therefrom.

Production of zinc chloride and zinc sulfate from geothermal brines

This invention relates to a method for the selective recovery of manganese and zinc from geothermal brines that includes the steps of removing silica and iron from the brine, oxidizing the manganese and zinc to form precipitates thereof, recovering the manganese and zinc precipitates, solubilizing the manganese and zinc precipitates, purifying the manganese and zinc, and forming a manganese precipitate, and recovering the zinc by electrochemical means.

Selective recovery of manganese, lead and zinc

Growing community of inventors

San Diego, CA, United States of America

Samaresh Mohanta