Appeal 2007-1943
Application 10/443,649
Comparative Hydrotreatment (HT) Processes
Procedure Specification Didchenko
Supply of high sulfur high sulfur1 decant oil high sulfur2 decant oil
crude oil fractions (Claims 4 & 14) (col. 2, ll. 38-48;
col. 3, ll.1-3 & 53-57;
col. 4, ll. 1-11 & 44-50;
col 5, l. 34,-col. 6, l. 2;
Exs. 1-5 & Table 1)
Hydrotreatment (HT) catalytic hydrogenation catalytic hydrogenation
(p. 2, ll. 20-25; (col. 3, ll. 8-9;
p. 4, ll. 22-27; col. 5, ll. 40-51)
p. 5, ll. 14-16;
p. 6, ll. 1-16;
Claims 7 & 17)
1 As per Appellants’ Claims 1 and 4, the high sulfur decant oil has an
initial sulfur content of about 1 wt% or greater. As per Appellants’ Claims
11 and 14, the high sulfur decant oil has an initial sulfur content of about 2
wt% or greater.
2 According to Didchenko, col. 2, ll. 46-48, “The decant oil used in the
art for making a feedstock for mesophase pitch has a low sulfur content in
the range of from about 1% to about 2.5% by weight.” In Didchenko’s
Table 1 (bridging cols. 9 & 10), the patentee reports that the initial sulfur
content of decant oils before hydrotreatment was 1.6 wt% (Exs. 1-2), 1.12
wt% (Ex. 3), and 2.35 wt% (Exs. 4-6).
7
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