Sandia Corporation

The United States of America As Represented by the Department of Energy

Sandia Corporaion

May D Nyman

Tina M Nenoff

Lauren E S Rohwer

James E Martin

David T Hobbs

Thomas Austin Stewart

A hydrothermal synthesis method of making a delaminated titanate is disclosed. The delaminated titanate has a unique structure or morphology. The delaminated titanate is first formed by forming at a low temperature a layered sodium nonatitanate (SNT), which may be referred to as layered sodium titanate. The layered SNT has a unique morphology. The layered SNT is then synthesized into a delaminated titanate having a unique morphology.

Delaminated sodium nonatitanate and a method for producing delaminated sodium nonatitanate

A family of rare-earth Group 5 oxides, where the Group 5 oxide is a niobate or tantalate. The rare-earth Group 5 oxides can be doped with suitable emitter ions to form nanophosphors.

Rare-earth tantalates and niobates suitable for use as nanophosphors

A hydrothermal method of synthesis of a family of rare-earth Group 5 oxides, where the Group 5 oxide is a niobate or tantalate. The rare-earth Group 5 oxides can be doped with suitable emitter ions to form nanophosphors.

Hydrothermal method of synthesis of rare-earth tantalates and niobates

Substitution of a single Ga-atom or single Ge-atom (GaAland GeAlrespectively) into the center of an aluminum Keggin polycation (Al) produces an optimal water-treatment product for neutralization and coagulation of anionic contaminants in water. GaAlconsistently shows &#x2dc;1 order of magnitude increase in pathogen reduction, compared to Al. At a concentration of 2 ppm, GaAlperforms equivalently to 40 ppm alum, removing &#x2dc;90% of the dissolved organic material. The substituted GaAlproduct also offers extended shelf-life and consistent performance. We also synthesized a related polyaluminum chloride compound made of pre-hydrolyzed dissolved alumina clusters of [GaOAl(OH)(HO)].

Optimized alumina coagulants for water treatment

The sorption capabilities (e.g., kinetics, selectivity, capacity) of the baseline monosodium titanate (MST) sorbent material currently being used to sequester Sr-90 and alpha-emitting radioisotopes at the Savannah River Site are significantly improved when treated with hydrogen peroxide; either during the original synthesis of MST, or, as a post-treatment step after the MST has been synthesized. It is expected that these peroxide-modified MST sorbent materials will have significantly improved sorption capabilities for non-radioactive cations found in industrial processes and waste streams.

Hydrogen peroxide modified sodium titanates with improved sorption capabilities

Niobate-based octahedral molecular sieves having significant activity for multivalent cations and a method for synthesizing such sieves are disclosed. The sieves have a net negatively charged octahedral framework, comprising niobium, oxygen, and octahedrally coordinated lower valence transition metals. The framework can be charge balanced by the occluded alkali cation from the synthesis method. The alkali cation can be exchanged for other contaminant metal ions. The ion-exchanged niobate-based octahedral molecular sieve can be backexchanged in acidic solutions to yield a solution concentrated in the contaminant metal. Alternatively, the ion-exchanged niobate-based octahedral molecular sieve can be thermally converted to a durable perovskite phase waste form.

Niobate-based octahedral molecular sieves

A new microporous crystalline molecular sieve material having the formula Cs TiSi O &bull;3H O and its hydrothermally condensed phase, Cs TiSi O , are disclosed. The microporous material can adsorb divalent ions of radionuclides or other industrial metals such as chromium, nickel, lead, copper, cobalt, zinc, cadmium, barium, and mercury, from aqueous or hydrocarbon solutions. The adsorbed metal ions can be leached out for recovery purposes or the microporous material can be hydrothermally condensed to a radiation resistant, structurally and chemically stable phase which can serve as a storage waste form for radionuclides.

Growing community of inventors

Albuquerque, NM, United States of America

May D Nyman