Chemistry of inorganic compounds – Sulfur or compound thereof – Binary compound
Reexamination Certificate
2007-07-24
2007-07-24
Green, Anthony J. (Department: 1755)
Chemistry of inorganic compounds
Sulfur or compound thereof
Binary compound
C106S401000, C423S021100, C423S565000
Reexamination Certificate
active
11365763
ABSTRACT:
The present invention relates to nano sized sulfide compounds of cerium and a process for the preparation thereof. More particularly, the present invention provides novel nano sized particles of cerium sulfide as well as a novel process for the preparation of nano sized sulfide compounds of cerium by the bioreduction of cerium sulfate or cerium acetate, without resorting to chemical methods. A bioprocess is disclosed to treat trivalent Cerium salt with sulfate-reducing bacteria (SRB) under controlled conditions to obtain a biomass, which is subjected to staggered heating upto a temperature of 600-1500° C. The sulfide of Cerium is finally separated for application in pigment industry.
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Nair Balachandran Unni
Ramasami Thirumalachari
Shrivastava Harinarain Yamini
Sreeram Kalarical Janardhanan
Varadaraju Upadhyayula Venkata
Green Anthony J.
Ladas and Parry LLP
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