wire mesh. The crucibles are partially surrounded by insulating brickwork on which
the metallic hood rests. Heat is supplied to the crucibles by a burner located below
the wire mesh support. The sample is heated for a specified period of time until all
the volatile content of the oil has evaporated, leaving the carbon as residue. The
carbon content of the oil is calculated as the weight of the carbon left as a
percentage of the weight of the original sample.
150–175
120–130
50–56
78–82
60–67
53–57
46–49
1/DIA
3
DIA
DIA
DIA
DIA
DIA
L DIA
L DIA
89
HOOD
APPROX
THICK
IRON CRUCIBLE
0-8
IRON CRUCIBLE
65–82mL CAPACITY
PORCELAIN
CRUCIBLE
29–31mL CAPACITY
WIRE SUPPORT
BARE NICHROME
(No 13 B & S GAUGE
APPROX) OR
EQUIVALENT
MEKER TYPE
BURNER
(OR EQUIVALENT)
HORIZONTAL
OPENING
6-5
DIA
SQ. OR DIA
37–39
58–60
32–38
50–53
125–130
50–60
50
30–32
DIA
DIA
DRY SAND
APPROX 25mL
INSULATOR
83
24
155
Fig. 11 Apparatus for determining Conradson carbon residue
Quality Control of Products in Petroleum Refining
677