B01J 31/4061
Involving membrane separation
Official title: {involving membrane separation}
B01J31/4061 (Involving membrane separation) appears on 53 US grants and 25 published applications in this corpus.
Search patents in B01J- Granted patents
- 53
- Published applications
- 25
- Assignees
- 28
- Inventors
- 153
- Latest grant
- 27 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 20 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 3 | 2 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for separating organic zinc catalyst using filtering membrane27 May 2025US 12,312,442 B2LG Chem.Ltd.
- Variable, self-regulating permeate recycling in organophilic nanofiltration13 May 2025US 12,296,301 B2Evonik Oxeno GmbH
- Process for separating one or more components from a mixture20 Aug 2024US 12,064,755 B2Evonik Oxeno GmbH
- Separation off of a homogeneous catalyst from a reaction mixture with the help of organophilic nanofiltration18 Dec 2018US 10,155,200 B2Evonik Degussa GmbH
- Membrane-supported catalyst removal in the epoxidation of cyclic unsaturated C12 compounds, for example cyclododecene (CDEN)9 May 2017US 9,643,153 B2Evonik Degussa GmbH
- Processes for recovering rhodium from hydroformylation processes1 May 2025US 2025/0137091 A1Dow Technology Investments LLC
- Formate production method and formate production system11 May 2023US 2023/0147963 A1Nitto Denko Corporation
- Hydrogen gas production method and hydrogen gas production system27 Oct 2022US 2022/0340420 A1Nitto Denko Corporation
- Variable, self-regulating permeate recycling in organophilic nanofiltration23 Jun 2022US 2022/0193609 A1Evonik Operations GmbH
- Method for separating organic zinc catalyst using filtering membrane19 Aug 2021US 2021/0253790 A1LG Chem.Ltd.
Most cited
By later US patents
- Recovery process for oxidation catalyst in the manufacture of aromatic carboxylic acids53US 5,955,394 AMobile Process Technology, Co. · 1999
- Membrane separation process35US 5,681,473 AUnion Carbide Chemicals & Plastics Technology Corporation · 1997
- Method for recovering a Group VIII metal solid complex and hydroformylation method32US 5,099,047 AMitsubishi Kasei Corporation · 1992
- Process for manufacture of bisphenol31US 5,783,733 AGeneral Electric Company · 1998
- Hydroformaylation processes25US 5,741,944 AUnion Carbide Chemicals & Plastics Technology Corporation · 1998