Organic photochemical reactions on solid surfaces: Enrichment and separation of isotopes. Final report. SBIR-1988, Phase 2
The objectives of the Phase II program were to: (1) investigate organic photochemical reactions on solid porous silica surfaces, (2) utilize the magnetic isotope effect to develop a (13)C enrichment process using a fluidized bed reactor, and (3) investigate the possibility of enrichment of heavier isotopes having a nuclear spin. Although researchers were able to demonstrate a continuous fluidized bed (13)C enrichment process, analysis showed that the process could not compete with low temperature distillation of CO because of the high cost of the starting material, dibenzylketone (DBK), and the difficulty of converting the photochemical decomposition products back to DBK. However, the process shows promise for the separation of heavier isotopes such as (29)Si. The photochemical studies led to the discovery that the selectivity for terminal chlorination of alkanes can be increased more than 25 fold by sorbing the alkanes on ZSM-5 zeolites in a fluidized bed. The selectivity is ascribed to the presence of interfaces within the crystals.
- Research Organization:
- INRAD, Inc., Northvale, NJ (United States)
- OSTI ID:
- 5910960
- Report Number(s):
- PB-92-122944/XAB; CNN: NSF-ISI83-13873
- Resource Relation:
- Other Information: Sponsored by National Science Foundation, Washington, DC. Div. of Industrial Science and Technological Innovation
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ALKANES
CHLORINATION
CARBON 13
ISOTOPE SEPARATION
SILICA
PHOTOCHEMICAL REACTIONS
SILICON 29
ADSORPTION
CARBON MONOXIDE
COMPARATIVE EVALUATIONS
DISTILLATION
ENRICHMENT
FLUIDIZED BEDS
KETONES
MAGNETIC MOMENTS
ZEOLITES
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
EVALUATION
EVEN-ODD NUCLEI
HALOGENATION
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTOPES
LIGHT NUCLEI
MATERIALS
MINERALS
NUCLEI
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SILICATE MINERALS
SILICON COMPOUNDS
SILICON ISOTOPES
SILICON OXIDES
SORPTION
STABLE ISOTOPES
400500* - Photochemistry
400703 - Radiochemistry & Nuclear Chemistry- Radioisotope Production
400201 - Chemical & Physicochemical Properties