公开(公告)号：US20230174450A1

公开(公告)日：2023-06-08

申请号：US17924264

申请日：2020-06-08

Applicant: ENTEGRIS, INC.

Inventor： Yuxin Song ,  Xianxin Wu ,  Chao Zhou ,  Yu Dong ,  Ping Jiang ,  ZhengZheng Du ,  Zicheng Song

IPC: C07C51/42 ,  B01D61/00 ,  B01D37/04

CPC classification number: C07C51/42 ,  B01D37/04 ,  B01D61/00 ,  B01D2313/44

Abstract: Citric acid is purified to remove metal ions through a two-step filtration process. A first filter is used to perform a first filtration, then a second filter is used to perform a second filtration on citric acid solution that has been subject to the first filtration. The first and second filters can include the same filter membrane material. The filter used as the first filter can be a relatively dirtier, more loaded filter compared to the filter used as the second filter. The first filtration can be performed over four hours of recirculating the citric acid solution through the first filter, and the second filtration can be performed over approximately two and one half hours of recirculating the citric acid solution through the second filter. Such a purification process can remove calcium and magnesium ions to render citric acid suitable as a cleaning solution in semiconductor processing.

公开(公告)号：US10034387B2

公开(公告)日：2018-07-24

申请号：US14962250

申请日：2015-12-08

Applicant: Entegris, Inc.

Inventor： André Brosseau ,  Svitlana Grigorenko ,  Ping Jiang ,  Michael B. Korzenski

IPC: H05K3/22 ,  C22B7/00 ,  C25C1/20 ,  C23F1/44 ,  C22B3/00

CPC classification number: H05K3/22 ,  C22B7/007 ,  C22B7/008 ,  C22B11/046 ,  C23F1/44 ,  C25C1/20 ,  H05K2203/176 ,  H05K2203/178 ,  Y02P10/214 ,  Y02P10/234 ,  Y02P20/582 ,  Y02P70/613 ,  Y02W30/54 ,  Y10T29/49815

Abstract: Processes for recycling printed wire boards using environmentally-friendly compositions, wherein electronic components, precious metals and base metals may be collected for reuse and recycling.

公开(公告)号：US20210040581A1

公开(公告)日：2021-02-11

申请号：US16069722

申请日：2016-01-14

Applicant: ENTEGRIS, Inc.

Inventor： Yuxin Song ,  Eric David Simms ,  James Moen ,  Jianfen Tong ,  Biqin Chen ,  Michael B. Korzenski ,  Ping Jiang ,  Bryan Hinzie ,  Richard T. Graves ,  Maryam Khoroshahi ,  James R. Garstka ,  Christopher Vroman ,  Brian Wesley Diessel-Horst

IPC: C22B3/00 ,  H05K3/22 ,  C22B1/00

Abstract: Systems and processes for recycling printed circuit boards, wherein precious metals may be reclaimed. The system generally includes a number of modules to systematically remove materials from the printed circuit boards and to separate the precious metals from the materials.

公开(公告)号：US09731368B2

公开(公告)日：2017-08-15

申请号：US14803962

申请日：2015-07-20

Applicant: Entegris, Inc.

Inventor： Tianniu Chen ,  Michael B. Korzenski ,  Ping Jiang

IPC: B23K31/02 ,  B23K1/018 ,  C25C1/00 ,  C22B3/02 ,  C22B3/00 ,  C22B7/00 ,  C22B1/00 ,  C22B4/00 ,  C22B3/04 ,  B23K3/08 ,  B23K37/00 ,  B09B3/00 ,  B09B5/00 ,  H05K3/22

CPC classification number: B23K1/018 ,  B09B3/00 ,  B09B5/00 ,  B23K3/08 ,  B23K37/00 ,  C22B1/005 ,  C22B3/02 ,  C22B3/04 ,  C22B4/00 ,  C22B7/006 ,  C22B11/046 ,  C25C1/00 ,  H05K3/22 ,  H05K2203/178 ,  Y02P10/234 ,  Y02P70/613 ,  Y02W30/82 ,  Y02W30/821 ,  Y02W30/822

Abstract: Apparatuses and processes for recycling printed wire boards, wherein electronic components, precious metals and base metals may be collected for reuse and recycling. The apparatuses generally include a mechanical solder removal module and/or a thermal module, a chemical solder removal module, and a precious metal leaching module, wherein the modules are attached for continuous passage of the e-waste from module to module.