Appeal No. 1996-3673
Application No. 08/139,893
Claim 14 is representative and is reproduced below:
14. A process for scavenging hydrogen sulfide from a
sour fluid containing hydrogen sulfide and comprising
production fluid, associate gas, residual fuel oil or waste
water, the process comprising bringing said sour fluid into
intimate mixture with a hydrogen sulfide scavenging amount of
a hydrogen sulfide scavenger prepared by reacting under non-
dehydrating conditions an alkylenepolyamine and formaldehyde
wherein the alkylene polyamine is represented by the formula
H NRNH(RNH) H2 x
wherein each R is independently an alkylene radical having 2
to about 20 carbon atoms and x is 0 to about 15, thereby
scavenging hydrogen sulfide in the sour fluid by effecting a
reaction between hydrogen sulfide in the sour fluid and the
scavenger.
The references of record relied upon by the examiner are:
Wilson 2,238,201 April 15,
1941
Moyer et al. (Moyer) 2,496,595 February 7,
1950
Go 3,819,328 June 25,
1974
The appealed claims stand rejected under 35 U.S.C. § 103
as unpatentable over Moyer in view of Wilson and Go.
We cannot sustain the stated rejection.
The subject matter on appeal is directed to a process for
scavenging hydrogen sulfide from various “sour fluids”
associated with crude oil production (i.e., production fluid,
associate gas, residual fuel oil, or waste water) by effecting
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