Iowa State University Research Foundation, Inc.

Cornell University

Marek Pruski

Vitalij K Pecharsky

Aaron David Sadow

Viktor Balema

Ihor Hlova

Anne M Lapointe

Wenyu Huang

Shalabh Gupta

Jerzy W Wiench

Frédéric A Perras

Xun Wu

Takeshi Kobayashi

Akalanka Tennakoon

Victor Shang-Yi Lin

Hung-Ting Chen

Andra Castle

Chih-Hsiang Tsai

Disclosed herein is a catalyst which comprises a silica core having an outer surface and a mesoporous silica shell having an outer surface and an inner surface with the inner surface being inside the outer surface of said mesoporous silica shell proximate to and surrounding the outer surface of said silica core. Wherein the outer surface of the mesoporous silica shell has openings leading to pores within the mesoporous silica shell which extend toward the outer surface of said silica core. The catalyst also includes catalytically active metal nanoparticles positioned within the pores proximate to said core, wherein the catalytic metal nanoparticles comprise about 0.0001 wt % to about 1.0 wt % of the catalyst. Also disclosed are methods of making the catalyst and using it to carry out a process for catalytically hydrogenolysizing a polyolefinic polymer.

Pore-encapsulated catalysts for selective hydrogenolysis of plastic waste

In some examples, a method of forming alane (AlH), the method comprising reacting one of: 1) a MAlH, wherein M is an alkali metal; 2) alkali-metal hydride, MH; or 3) alkali-metal with one or more aluminum halides (AlX, where X is a halogen), via a mechanochemical process, to form the alane, wherein the reaction is substantially solvent free and carried out in an environment with a temperature between approximately 250 K and approximately 330 K.

Mechanochemical synthesis of alane

A method is provided for making alkali metal hydrides by mechanochemically reacting alkali metal and hydrogen gas under mild temperature (e.g room temperature) and hydrogen pressure conditions without the need for catalyst, solvent, and intentional heating or cooling.

Method of making alkali metal hydrides

The present invention provides bifunctional silica mesoporous materials, including mesoporous silica nanoparticles ('MSN'), having pores modified with diarylammonium triflate and perfluoroaryl moieties, that are useful for the acid-catalyzed esterification of organic acids with organic alcohols.

Multifunctional mesoporous silica catalyst

The present invention provides a method of preparing a phosphonium salt of the formula [RRRP&#x2014;CRRR]X, comprising ball-milling a phosphine of the formula RRRP with a compound of the formula XCRRR; a method of preparing a phosphorus ylide of the formula RRRP&#x2550;CRR, comprising ball-milling a phosphonium salt of the formula [RRRP&#x2014;HCRR]X in the presence of a base; and a method of preparing an olefin of the formula RRC&#x2550;CRH or RRC&#x2550;CRR, comprising ball-milling a phosphorus ylide of the formula RRRP&#x2550;CRRwith a compound of the formula RC(O)H or RC(O)R. The inventive method produces phosphonium salts and phosphorus ylides by mechanical processing solid reagents under solvent-free conditions. The advantages of the present invention over conventional solution methods, include: (1) extremely high selectivity; (2) high yields; (3) low processing temperatures; (4) simple and scalable reactions using commercially available equipment; and (5) the complete elimination of solvents from the reaction.

Solvent-free mechanochemical preparation of phosphonium salts, phosphorus ylides, and olefins

The present invention provides a method of preparing a phosphonium salt of the formula &lsqb;R R R P&mdash;CR R R &rsqb;X, comprising ball-milling a phosphine of the formula R R R P with a compound of the formula XCR R R ; a method of preparing a phosphorus ylide of the formula R R R P&boxH;CR R , comprising ball-milling a phosphonium salt of the formula &lsqb;R R R P&mdash;HCR R &rsqb;X in the presence of a base; and a method of preparing an olefin of the formula R R C&boxH;CR H or R R C&boxH;CR R , comprising ball-milling a phosphorus ylide of the formula R R R P&boxH;CR R with a compound of the formula R C(O)H or R C(O)R . The inventive method produces phosphonium salts and phosphorus ylides by mechanical processing solid reagents under solvent-free conditions. The advantages of the present invention over conventional solution methods, include: (1) extremely high selectivity; (2) high yields; (3) low processing temperatures; (4) simple and scalable reactions using commercially available equipment; and (5) the complete elimination of solvents from the reaction.

Growing community of inventors

Ames, IA, United States of America

Marek Pruski