Absorption media for irreversibly gettering thionyl chloride

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874836

Buffleben, George ^[1]; Goods, Steven H ^[2]; Shepodd, Timothy ^[2]; Wheeler, David R ^[3]

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1. Tracy, CA
2. Livermore, CA
3. Albuquerque, NM

Thionyl chloride is a hazardous and reactive chemical used as the liquid cathode in commercial primary batteries. Contrary to previous thinking, ASZM-TEDA.RTM. carbon (Calgon Corporation) reversibly absorbs thionyl chloride. Thus, several candidate materials were examined as irreversible getters for thionyl chloride. The capacity, rate and effect of temperature were also explored. A wide variety of likely materials were investigated through screening experiments focusing on the degree of heat generated by the reaction as well as the material absorption capacity and irreversibility, in order to help narrow the group of possible getter choices. More thorough, quantitative measurements were performed on promising materials. The best performing getter was a mixture of ZnO and ASZM-TEDA.RTM. carbon. In this example, the ZnO reacts with thionyl chloride to form ZnCl.sub.2 and SO.sub.2. The SO.sub.2 is then irreversibly gettered by ASZM-TEDA.RTM. carbon. This combination of ZnO and carbon has a high capacity, is irreversible and functions effectively above -20.degree. C.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia National Laboratories (Livermore, CA)
• Patent Number(s): US 6471886
• OSTI ID: 874836
• Country of Publication: United States
• Language: English

Related Subjects

absorption
media
irreversibly
gettering
thionyl
chloride
hazardous
reactive
chemical
liquid
cathode
commercial
primary
batteries
contrary
previous
thinking
aszm-tedartm
carbon
calgon
corporation
reversibly
absorbs
candidate
materials
examined
irreversible
getters
capacity
rate
effect
temperature
explored
wide
variety
investigated
screening
experiments
focusing
degree
heat
generated
reaction
material
irreversibility
help
narrow
getter
choices
thorough
quantitative
measurements
performed
promising
performing
mixture
zno
example
reacts
form
znclsub2
sosub2
gettered
combination
functions
effectively
-20degree
heat generated
reactive chemical
thionyl chloride
/252/423/502/