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Title: On-line method of determining utilization factor in Hg-196 photochemical separation process

Abstract

The present invention is directed to a method for determining the utilization factor [U] in a photochemical mercury enrichment process (.sup.196 Hg) by measuring relative .sup.196 Hg densities using absorption spectroscopy.

Inventors:
 [1];  [2]
  1. (Belmont, MA)
  2. (Peabody, MA)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
868221
Patent Number(s):
US 5100803
Assignee:
GTE Products Corporation (Danvers, MA) LBNL
DOE Contract Number:
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
on-line; method; determining; utilization; factor; hg-196; photochemical; separation; process; directed; mercury; enrichment; 196; hg; measuring; relative; densities; absorption; spectroscopy; mercury enrichment; separation process; photochemical mercury; photochemical separation; enrichment process; chemical separation; absorption spectroscopy; utilization factor; measuring relative; hg-196 photochemical; /436/204/250/

Citation Formats

Grossman, Mark W., and Moskowitz, Philip E. On-line method of determining utilization factor in Hg-196 photochemical separation process. United States: N. p., 1992. Web.
Grossman, Mark W., & Moskowitz, Philip E. On-line method of determining utilization factor in Hg-196 photochemical separation process. United States.
Grossman, Mark W., and Moskowitz, Philip E. Wed . "On-line method of determining utilization factor in Hg-196 photochemical separation process". United States. doi:. https://www.osti.gov/servlets/purl/868221.
@article{osti_868221,
title = {On-line method of determining utilization factor in Hg-196 photochemical separation process},
author = {Grossman, Mark W. and Moskowitz, Philip E.},
abstractNote = {The present invention is directed to a method for determining the utilization factor [U] in a photochemical mercury enrichment process (.sup.196 Hg) by measuring relative .sup.196 Hg densities using absorption spectroscopy.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Patent:

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  • This patent describes a method for determining the utilization factor (U) in a photochemical mercury enrichment process ({sup 196}Hg), it comprises measuring the relative {sup 196}Hg yield and flow rate by means of absorption spectroscopy and calculating U according to the following formula: U{sub 196} = Y{sub 196}/Q{sub 196} where Y and Q refer, to the {sup 196}Hg product yield and {sup 196} Hg feedstock flow rate, respectively.
  • A method of removing deposited product from a photochemical reactor used in the enrichment of .sup.196 Hg has been developed and shown to be effective for rapid re-cycling of the reactor system. Unlike previous methods relatively low temperatures are used in a gas and vapor phase process of removal. Importantly, the recovery process is understood in a quantitative manner so that scaling design to larger capacity systems can be easily carried out.
  • A method of removing deposited product from a photochemical reactor used in the enrichment of [sup 196]Hg has been developed and shown to be effective for rapid re-cycling of the reactor system. Unlike previous methods relatively low temperatures are used in a gas and vapor phase process of removal. Importantly, the recovery process is understood in a quantitative manner so that scaling design to larger capacity systems can be easily carried out. 2 figs.
  • Straight tubes and randomly oriented pieces of tubing having been employed in a photochemical mercury enrichment reactor and have been found to improve the enrichment factor (E) and utilization (U) compared to a non-packed reactor. One preferred embodiment of this system uses a moving bed (via gravity) for random packing.
  • This patent describes a photochemical reactor useful for the isotopic enrichment of a predetermined isotope of mercury comprising a reactor cell and a monoisotopic light source It comprises: a plurality of transparent, straight reactor cell tubes disposed axially within the internal volume of the reactor cell to increase the surface area thereof for production deposition.