公开(公告)号：US20240279255A1

公开(公告)日：2024-08-22

申请号：US18290969

申请日：2022-10-06

申请人： Dow Global Technologies LLC ,  Dow Silicones Corporation

发明人： Erich Molitor ,  Joseph Neuman ,  Michael Tulchinsky ,  Ruth Figueroa ,  David Devore ,  Mrunmayi Kumbhalkar ,  Michael Ferritto ,  Michael Telgenhoff ,  Brian Rekken ,  Souvagya Biswas ,  Michael A. Brammer ,  Heather A. Spinney

IPC分类号： C07F7/08 ,  C08G77/26

CPC分类号： C07F7/0889 ,  C07F7/0838 ,  C08G77/26

摘要： An organosilicon compound with a primary aminopropyl-functional group is prepared. A catalyzed reductive amination process for combining a secondary propylimine-functional organosilicon compound with ammonia and hydrogen produces the primary aminopropyl-functional organosilicon compound.

公开(公告)号：US20240336495A1

公开(公告)日：2024-10-10

申请号：US18577434

申请日：2022-09-19

申请人： Dow Global Technologies LLC

发明人： Deboleena Chakraborty ,  Ronald R. Peterson ,  Reza Hagh Panah ,  Erich Molitor ,  Mark A. Robertson

IPC分类号： C02F1/28 ,  B01J20/20 ,  C02F101/38 ,  C07C227/40

CPC分类号： C02F1/283 ,  B01J20/20 ,  C07C227/40 ,  C02F2101/38

摘要： The present invention provides simple methods for treating aqueous chelating agent compositions containing one or more nitrilotriacetic acid (NTA) salts with one or more adsorbents, such as activated carbon, two or more activated carbon adsorbent in sequential treatments, to remove the NTA without removing more than 5 wt. %, or more than 3 wt. % or, preferably, more than 1 wt. % of the chelating agent in the aqueous chelating agent compositions. The methods comprise treating aqueous chelating agent compositions having a pH of from 7 to 12 and can be carried out at from 10 to 110 C. The methods can be used to treat a wide range of aqueous chelating agent compositions having, for example, from 700 to 6000 ppm of NTA, such as waste streams.