Treatment by methods not otherwise provided for of hydrocarbon oils or fatty oils for lubricating purposes (by Fischer-Tropsch C 07 C 1/00; lubricating compositions C 10 M) [3]
71
/
02
•
Thickening by voltolising (chemical modification of drying-oils by voltolising C 09 F 7/04) [3]
Recovery or refining of mineral waxes, e.g. montan wax (compositions essentially based on waxes C 08 L 91/00) [3]
73
/
02
•
Recovery of petroleum waxes from hydrocarbon oils; De-waxing of hydrocarbon oils [3]
73
/
04
•
•
with the use of filter aids [3]
73
/
06
•
•
with the use of solvents [3]
73
/
08
•
•
•
Organic compounds [3]
73
/
10
•
•
•
•
Hydrocarbons [3]
73
/
12
•
•
•
•
Oxygen-containing compounds [3]
73
/
14
•
•
•
•
Halogen-containing compounds [3]
73
/
16
•
•
•
•
Nitrogen-containing compounds [3]
73
/
18
•
•
•
•
containing sulfur, selenium or tellurium [3]
73
/
20
•
•
•
•
containing phosphorus [3]
73
/
22
•
•
•
•
Mixtures of organic compounds [3]
73
/
23
•
•
•
Recovery of used solvents [6]
73
/
24
•
•
by formation of adducts [3]
73
/
26
•
•
by flotation [3]
73
/
28
•
•
by centrifugal force [3]
73
/
30
•
•
with electric means [3]
73
/
32
•
•
Methods of cooling during de-waxing [3]
73
/
34
•
•
Controlling or regulating (controlling or regulating in general G 05) [3]
73
/
36
•
Recovery of petroleum waxes from other compositions containing oil in minor proportions, from concentrates or from residues; De-oiling, sweating [3]
73
/
38
•
Chemical modification of petroleum waxes [3]
73
/
40
•
Physical treatment of waxes or modified waxes, e.g. granulation, dispersion, emulsion, irradiation [3]
73
/
42
•
Refining of petroleum waxes [3]
73
/
44
•
•
in the presence of hydrogen or hydrogen-generating compounds [3]
75
/
00
Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general (C 10 G 7/10
, C 10 G 9/16 take precedence; protection of pipes against corrosion or incrustation F 16 L 58/00) [6]
