公开(公告)号：US10384193B2

公开(公告)日：2019-08-20

申请号：US15933328

申请日：2018-03-22

Applicant: TDA Research, Inc

Inventor： Vinh The Nguyen ,  Steven Dietz ,  Steve Paglieri

IPC: B01J23/42 ,  B01J31/02 ,  B01J21/18 ,  B01J35/10 ,  B01J35/00 ,  H01M4/92 ,  B01D67/00 ,  B01D69/02 ,  B01D69/06 ,  B01D71/02

Abstract: A platinum-carbon electrocatalyst material comprising a carbon support having a minimum BET surface area of 1000 m2/g, a nitrogen content of at least 2.5 weight percent, which is present in the form of pyridine, pyridone or pyrrole, a phosphorous content of at least 3 weight percent, which is present in the form of phosphate and phosphonate, and a plurality of platinum nanoparticles dispersed on the carbon support having a maximum average particle diameter of 1.5 nm.

公开(公告)号：US20190099737A1

公开(公告)日：2019-04-04

申请号：US16128293

申请日：2017-03-24

Applicant: TDA Research, Inc.

Inventor： Girish Srinivas ,  Steven Dietz

IPC: B01J20/20 ,  B01J20/28 ,  C01B32/30 ,  C07D209/42 ,  C07C201/12 ,  C07C201/16 ,  C07C67/56 ,  C07C67/34

Abstract: The present invention relates to a carbon sorbent the can selectively remove platinum-group metals and other heavy metals such as tin without co-removing organic synthesis products including pharmaceutical intermediates and finished Active Pharmaceutical Ingredients (APIs). The carbon sorbents of the present invention are made from low-cost, high purity starting materials and the resulting carbon sorbents are also very pure. The carbon sorbents possess a combination of certain nitrogen and phosphorous groups combined with mesoporosity (2 to 50 nm diameter pores) that proves the high metal adsorption.

公开(公告)号：US20240217838A1

公开(公告)日：2024-07-04

申请号：US18424337

申请日：2024-01-26

Applicant: TDA Research, Inc

Inventor： Girish Srinivas ,  Vinh T Nguyen ,  Steven Dietz

IPC: C01G49/00

CPC classification number: C01G49/009 ,  C01P2002/01 ,  C01P2002/72 ,  C01P2004/04 ,  C01P2004/51 ,  C01P2006/40

Abstract: A continuous hydrothermal process for producing LFP/LMFP cathode materials for lithium-ion batteries. The reactant solutions include: (1) a lithium precursor (LiOH) and a carbon source (15 wt % sucrose); (2) an iron precursor (FeSO4) and a phosphorus precursor (H3PO4); and in the case of LMFP, a manganese precursor (MnSO4) and a surfactant in solution 2. Reactant solutions are fed into a series of one or more continuous stirred tank reactors (CSTRs) at a constant flowrate. Active LFP/LMFP flows out of the CSTRs and into a collection tank, where it is cooled and depressurized. The product flows into a slurry tank, then a centrifugal separator to remove aqueous waste. The LFP/LMFP is transferred to a continuous rotary kiln for drying and sintering, and the carbon coating forms. The disclosed processes produce LFP/LMFP with small average particle size, high purity, high capacity, and high yield without any ball-milling or sieving steps.

公开(公告)号：US11077421B2

公开(公告)日：2021-08-03

申请号：US16128293

申请日：2017-03-24

Applicant: TDA Research, Inc.

Inventor： Girish Srinivas ,  Steven Dietz

IPC: B01J20/20 ,  B01J20/28 ,  B01J20/30 ,  C01B32/30 ,  C07C67/34 ,  C07C67/56 ,  C07C201/12 ,  C07C201/16 ,  C07D209/42 ,  B01D15/00

Abstract: The present invention relates to a carbon sorbent the can selectively remove platinum-group metals and other heavy metals such as tin without co-removing organic synthesis products including pharmaceutical intermediates and finished Active Pharmaceutical Ingredients (APIs). The carbon sorbents of the present invention are made from low-cost, high purity starting materials and the resulting carbon sorbents are also very pure. The carbon sorbents possess a combination of certain nitrogen and phosphorous groups combined with mesoporosity (2 to 50 nm diameter pores) that proves the high metal adsorption.

公开(公告)号：US20180272320A1

公开(公告)日：2018-09-27

申请号：US15933328

申请日：2018-03-22

Applicant: TDA Research, Inc

Inventor： Vinh The Nguyen ,  Steven Dietz ,  Steve Paglieri

IPC: B01J23/42 ,  B01J31/02 ,  B01J21/18 ,  B01J35/00 ,  B01J35/10

CPC classification number: B01J23/42 ,  B01D71/62 ,  B01J21/18 ,  B01J31/0244 ,  B01J31/0258 ,  B01J35/0033 ,  B01J35/006 ,  B01J35/1028 ,  B01J35/1038 ,  B01J35/1057 ,  H01M4/926

Abstract: A platinum-carbon electrocatalyst material comprising a carbon support having a minimum BET surface area of 1000 m2/g, a nitrogen content of at least 2.5 weight percent, which is present in the form of pyridine, pyridone or pyrrole, a phosphorous content of at least 3 weight percent, which is present in the form of phosphate and phosphonate, and a plurality of platinum nanoparticles dispersed on the carbon support having a maximum average particle diameter of 1.5 nm.