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Title: Freeze drying apparatus

Abstract

The present invention provides methods and apparatus for freeze drying in which a solution, which can be a radioactive salt dissolved within an acid, is frozen into a solid on vertical plates provided within a freeze drying chamber. The solid is sublimated into vapor and condensed in a cold condenser positioned above the freeze drying chamber and connected thereto by a conduit. The vertical positioning of the cold condenser relative to the freeze dryer helps to help prevent substances such as radioactive materials separated from the solution from contaminating the cold condenser. Additionally, the system can be charged with an inert gas to produce a down rush of gas into the freeze drying chamber to also help prevent such substances from contaminating the cold condenser.

Inventors:
 [1];  [2];  [2]
  1. (Malvern, PA)
  2. (Youngstown, NY)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
874098
Patent Number(s):
6311409
Assignee:
The BOC Group, Inc. (Murray Hill, NJ) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
freeze; drying; apparatus; provides; methods; solution; radioactive; salt; dissolved; acid; frozen; solid; vertical; plates; provided; chamber; sublimated; vapor; condensed; cold; condenser; positioned; connected; conduit; positioning; dryer; helps; help; prevent; substances; materials; separated; contaminating; additionally; charged; inert; gas; produce; rush; inert gas; vertical position; salt dissolved; drying apparatus; /34/

Citation Formats

Coppa, Nicholas V., Stewart, Paul, and Renzi, Ernesto. Freeze drying apparatus. United States: N. p., 2001. Web.
Coppa, Nicholas V., Stewart, Paul, & Renzi, Ernesto. Freeze drying apparatus. United States.
Coppa, Nicholas V., Stewart, Paul, and Renzi, Ernesto. Mon . "Freeze drying apparatus". United States. https://www.osti.gov/servlets/purl/874098.
@article{osti_874098,
title = {Freeze drying apparatus},
author = {Coppa, Nicholas V. and Stewart, Paul and Renzi, Ernesto},
abstractNote = {The present invention provides methods and apparatus for freeze drying in which a solution, which can be a radioactive salt dissolved within an acid, is frozen into a solid on vertical plates provided within a freeze drying chamber. The solid is sublimated into vapor and condensed in a cold condenser positioned above the freeze drying chamber and connected thereto by a conduit. The vertical positioning of the cold condenser relative to the freeze dryer helps to help prevent substances such as radioactive materials separated from the solution from contaminating the cold condenser. Additionally, the system can be charged with an inert gas to produce a down rush of gas into the freeze drying chamber to also help prevent such substances from contaminating the cold condenser.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

Patent:

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