Sarah C Larsen

US Patent:

7858062, Dec 28, 2010

Filed:

Jul 28, 2009

Appl. No.:

12/510776

Inventors:

Sarah Larsen - Iowa City IA, US
Vicki Grassian - Iowa City IA, US
Weiguo Song - Beijing, CN

Assignee:

University of Iowa Research Foundation - Iowa City IA

International Classification:

B01D 53/56
B01D 53/86
B01D 47/00
B01D 53/94
B01J 8/00
B01J 8/02
C01B 21/00
B01J 29/08

US Classification:

4232392, 4232391, 423235, 423212, 4232132, 502 79

Abstract:

Embodiments of the present invention relate to a method for synthesizing nanocrystalline zeolites, the method comprising contacting starting products that comprise a solvent, a silicon source, a cation base, an organic template, and an aluminum source, or any combination thereof sufficient to produce a zeolite gel by hydrolysis, heating the zeolite gel sufficient to produce a first batch of zeolite crystals and a first clear solution, separating the first batch of zeolite crystals from the first clear solution, heating the first clear solution sufficient to produce a second batch of zeolite crystals and second clear solution and separating the second batch of zeolite crystals from the second clear solution. In addition, embodiments relate to a method of using nanocrystalline zeolites, the method comprising contacting a nanocrystalline zeolite with a reductant sufficient to produce a nanocrystalline zeolite with adsorbed reductant and exposing the nanocrystalline zeolite with adsorbed reductant to reactant gases sufficient to obtain reaction products and the nanocrystalline zeolite.

US Patent:

20070071666, Mar 29, 2007

Filed:

Apr 17, 2006

Appl. No.:

11/379015

Inventors:

Sarah Larsen - Iowa City IA, US
Vicki Grassian - Iowa City IA, US
Weiguo Song - Bejing, CN

International Classification:

C01B 39/00
C01B 39/04
C01B 33/36
C01B 21/00
C01C 1/00
C01C 1/02

US Classification:

423351000, 423705000, 423702000, 423707000, 423716000, 423352000, 423356000

Abstract:

Embodiments of the present invention relate to a method for synthesizing nanocrystalline zeolites, the method comprising contacting starting products that comprise a solvent, a silicon source, a cation base, an organic template, and an aluminum source, or any combination thereof sufficient to produce a zeolite gel by hydrolysis, heating the zeolite gel sufficient to produce a first batch of zeolite crystals and a first clear solution, separating the first batch of zeolite crystals from the first clear solution, heating the first clear solution sufficient to produce a second batch of zeolite crystals and second clear solution and separating the second batch of zeolite crystals from the second clear solution. In addition, embodiments relate to a method of using nanocrystalline zeolites, the method comprising contacting a nanocrystalline zeolite with a reductant sufficient to produce a nanocrystalline zeolite with adsorbed reductant and exposing the nanocrystalline zeolite with adsorbed reductant to reactant gases sufficient to obtain reaction products and the nanocrystalline zeolite.

US Patent:

20120027673, Feb 2, 2012

Filed:

Jul 28, 2011

Appl. No.:

13/193180

Inventors:

Sarah Larsen - Iowa City IA, US
Anton Petushkov - Lafayette Hill PA, US

Assignee:

University of Iowa Research Foundation - Iowa City IA

International Classification:

C01B 39/04
C01B 39/40

US Classification:

423704, 423702

Abstract:

A one step synthesis of nanocrystalline zeolites ZSM-5 and Naβ from a single template system in high yield has been discovered. The size of individual nanocrystals, as well as mesopore surface area and pore volume can be controlled by adjusting the pH of the reaction mixture, as well as the hydrothermal treatment temperature and duration. The mesopore volume and size distribution show a dependence on particle size such that smaller particles lead to higher mesopore volumes and narrower pore size distributions.

US Patent:

20170225967, Aug 10, 2017

Filed:

Feb 8, 2016

Appl. No.:

15/018213

Inventors:

- Aiken SC, US
- Iowa City IA, US
Steven M. Serkiz - Aiken SC, US
Sarah C. Larsen - Iowa City IA, US
Shani Egodawatte - Iowa City IA, US

International Classification:

C02F 1/28
G21F 9/12
B01J 20/28
C02F 1/48
B01J 20/10
B01J 20/02

Abstract:

The present invention is directed to a method of removing uranium from a uranium containing aqueous medium. The method comprises a step of contacting the medium with magnetic mesoporous silica nanoparticles. The nanoparticles comprise mesoporous silica and iron oxide. The nanoparticles may also comprise a functionalized surface obtained by grafting or covalently bonding a functional molecule to the nanoparticle.