公开(公告)号：US11198828B2

公开(公告)日：2021-12-14

申请号：US17041877

申请日：2019-03-27

Applicant: BIONOMIC INDUSTRIES INC. ,  UNIVERSITY OF MASSACHUSETTS, A PUBLIC INSTITUTION OF HIGHER EDUCATION OF THE COMMONWEALTH OF MASSACHUSETTS

Inventor： Chen-Lu Yang ,  Kumari I. Kaushik ,  John Enhoffer

IPC: C10L3/10 ,  C10K1/00 ,  C01B17/05 ,  B01J23/34 ,  B01D53/96 ,  B01D53/78 ,  B01D53/52

Abstract: A process and method for removing hydrogen sulfide from a gas and regenerating ferric ions consumed in the hydrogen sulfide scrubbing process at low pH. A two-scrubber regenerative chemical scrubbing system for removing hydrogen sulfide from a gas that provides an economical system for removing hydrogen sulfide from a gas at low pH without the need for chelating agents. An oxide of manganese is used as a catalyst to enhance the regeneration of ferric ions in an aqueous solution under acidic conditions in the presence of oxygen. The process may further include contacting the aqueous solution with a second gas comprising air to replenish the dissolved oxygen in the aqueous solution. The regenerated solution comprising ferric ions can be reused to treat additional hydrogen sulfide containing gases.

公开(公告)号：US10514242B1

公开(公告)日：2019-12-24

申请号：US15293717

申请日：2016-10-14

Applicant: The University of Massachusetts

Inventor： Chen-Lu Yang

IPC: C25C1/12 ,  C25C1/16 ,  F42B33/06 ,  C25C7/00

Abstract: In a method for electrochemical ammunition disposal and material recovery, ammunition cartridges are placed in an acidic aqueous solution that is in contact with a cathode and an anode. The ammunition cartridges have a casing that includes an alloy of copper and zinc. The ammunition cartridges are agitated in the acidic aqueous solution as a voltage is applied between the anode and the cathode. The applied voltage is effective to oxidize and dissolve zinc from the copper-zinc alloy. Copper metal derived from the alloy can be recovered as a solid, and zinc ion derived from the alloy can be recovered as a solution.

公开(公告)号：US11150067B1

公开(公告)日：2021-10-19

申请号：US16688163

申请日：2019-11-19

Applicant: The University of Massachusetts

Inventor： Chen-Lu Yang

IPC: F42B33/06 ,  C25C7/00 ,  C25C1/12 ,  C25C5/02 ,  C25C7/02

Abstract: In a method for electrochemical ammunition disposal and material recovery, ammunition cartridges are placed in an acidic aqueous solution that is in contact with a cathode and an anode. The ammunition cartridges have a casing that includes an alloy of copper and zinc. The ammunition cartridges are agitated in the acidic aqueous solution as a voltage is applied between the anode and the cathode. The applied voltage is effective to oxidize and dissolve zinc from the copper-zinc alloy. Copper metal derived from the alloy can be recovered as a solid, and zinc ion derived from the alloy can be recovered as a solution.

公开(公告)号：US10807085B2

公开(公告)日：2020-10-20

申请号：US16193034

申请日：2018-11-16

Applicant: University of Massachusetts

Inventor： Tabish Nawaz ,  Sukalyan Sengupta ,  Chen-Lu Yang

IPC: B01J49/06 ,  B01J49/53 ,  B01J49/60 ,  B01J39/04 ,  C02F1/42 ,  B01J39/20 ,  C02F101/20 ,  C02F103/00 ,  C02F1/66 ,  C02F1/461 ,  C02F1/52

Abstract: Silver is recovered as Ag0 nanoparticles from the spent solution obtained from the regeneration of an Ag-loaded ion exchange resin using electrolysis. The reclaimed regenerant solution is recycled and reused in a closed-loop scheme over multiple cycles. The recovered Ag0 nanoparticles are monodisperse, spherical in shape, and have a mean diameter of about 6 nm.