Freeze drying method
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:
-
- Malvern, PA
- Youngstown, NY
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 872721
- Patent Number(s):
- 5996248
- Assignee:
- BOC Group, Inc. (New Providence, NJ)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F26 - DRYING F26B - DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- freeze; drying; method; provides; methods; apparatus; solution; radioactive; salt; dissolved; acid; frozen; solid; vertical; plates; provided; chamber; sublimated; vapor; condensed; cold; condenser; positioned; connected; thereto; conduit; positioning; relative; dryer; helps; help; prevent; substances; materials; separated; contaminating; additionally; charged; inert; gas; produce; rush; connected thereto; drying chamber; provides methods; radioactive material; active material; inert gas; radioactive materials; active materials; vertical position; salt dissolved; freeze drying; help prevent; radioactive salt; /34/
Citation Formats
Coppa, Nicholas V, Stewart, Paul, and Renzi, Ernesto. Freeze drying method. United States: N. p., 1999.
Web.
Coppa, Nicholas V, Stewart, Paul, & Renzi, Ernesto. Freeze drying method. United States.
Coppa, Nicholas V, Stewart, Paul, and Renzi, Ernesto. Fri .
"Freeze drying method". United States. https://www.osti.gov/servlets/purl/872721.
@article{osti_872721,
title = {Freeze drying method},
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 = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}