Daniel A Lev, 4871 Hillside Ter, Belmont, MA 02478

2004007, Apr 22, 2004

Oct 17, 2002

10/273810

Daniel Alvarez - San Diego CA, US
Jeffrey Spiegelman - San Diego CA, US
Russell Holmes - Santee CA, US
Daniel Lev - San Diego CA, US

C01B031/20

423/437100

A method for decontaminating fluid carbon dioxide for use in a product production process such as carbonated beverage production is disclosed. Contaminants, including those normally highly resistant to removal such as S, N, P and Si compounds (especially COS), are removed from the COby contact with a metal oxide decontamination agent. The metal oxide is one or more oxides of transition metal elements including lanthanides, the iron oxides being preferred. Decontamination of the COis interrupted at intervals for regeneration of the metal oxide agent by passage of COcontaining an oxygen-containing contaminant over the metal oxide in a countercurrent flow direction at higher temperature for a short time. The metal oxide decontaminant may also be mixed with a high-silica content zeolite, preferably a Zeolite Y or zeolite ZSM-5. The contaminated COand the COcontaining an oxygen-containing contaminant are preferably from the same source.

2006018, Aug 24, 2006

Jul 21, 2004

10/565353

Daniel Alvarez - San Diego CA, US
Jeffrey Spiegelman - San Diego CA, US
Joshua Cook - Encinitas CA, US
Tram Nguyen - Westminster CA, US
Daniel Lev - San Diego CA, US
Troy Scoggins - San Diego CA, US

B01D 47/00

423210000

A method for hydride gas purification uses materials having at least one lanthanide metal or lanthanide metal oxide. The method reduces contaminants to less than 100 parts per billion (ppb), preferably 10 ppb, more preferably 1 ppb. The material can also include transition metals and transition metal oxides, rare earth elements and other metal oxides. The invention also includes materials for use in the method of the invention.

2007002, Feb 8, 2007

Apr 2, 2004

10/552249

Douglas Grotjahn - San Diego CA, US
Daniel Lev - Chicago IL, US

San Diego State University Foundation - San Diego CA

H01B 1/12

252500000

Compositions and methods useful in facilitating or conducting a reaction at effective conditions, such as room temperature (e.g. about 70 degrees F.), utilize a compound including at least two different heteroatoms, and optionally a heterocycle, and a transition metal. The compound is effective in facilitating a variety of reactions including hydrolysis reactions, alcoholysis reactions, aminolysis reactions, carbon dioxide conversion reactions, hydroamination reactions, hydration reactions, and the like.

2007003, Feb 8, 2007

Jun 23, 2004

10/559070

Daniel Alvarez - San Diego CA, US
Daniel Lev - Chicago IL, US
Jeffrey Spiegelman - San Diego CA, US
Tram Nguyen - Westminster CA, US
Russell Holmes - Santee CA, US

C01F 11/22
C01F 5/28

423490000, 423210000

A process, composition and apparatus for the removal of impurities from corrosive gases, particularly halogen-containing gases, down to about 100 ppb concentration are described. The critical component is zirconia (ZrO), which in a variety of physical forms is capable of dehydrating such gases. The zirconia can be in the form of a coating on a substrate, as a granular bulk material, or deposited within the pores of a porous body. The zirconia is retained in a simple container which is easily installed in a gas supply line, such as to a gas- or vapor-deposition manufacturing unit. The purification process can be operated for long periods of time in the presence of these gases. The invention provides final purification to gas streams intended for gas- or vapor-deposition formation of high purity electronic, prosthetic or similar products, and can be used in combination with a preliminary dehydration process or a solid particulate removal unit upstream.