Process for obtaining paraffin or paraffin fractions

Details Process for obtaining paraffin or paraffin fractions Process for obtaining paraffin or paraffin fractions

1998-07-16

2000-06-13

Griffin, Walter D.

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 24, 208 28, 208 32, 208 37, C10G 7302, C10G 7300, C10G 7332

Patent

active

060745487

ABSTRACT:
A process for fractional crystallization of paraffin from mineral oil based and synthetic crude paraffin, wherein crude paraffin having a high oil content is crystallized in a crystallizer equipped with perforated metal sheets (31) extending in a zig-zag in the spaces between the heat exchanger surfaces (39). The paraffin-containing melt is only solidified to an extent such that the fractions and oils for discharge remain liquid and are run off without total solidification of the melt. The perforated sheets (31) support the layers of crystals (43) and during sweating the paraffin is detached in strips from the heat exchanger surface (39) and is adapted to rest on the sloping perforated sheets (31). The inclination of the perforated sheets (31) guides and moves the paraffin strips (53), so that the paraffin strips remain in contact with the heat exchanger surfaces (39) while being pressed by their own weight along the inclined surface (30) towards the heat exchanger surfaces (39).

REFERENCES:
patent: 3926776 (1975-12-01), Irwin et al.
patent: 4013541 (1977-03-01), Irwin et al.
patent: 5015357 (1991-05-01), Rueff
patent: 5338519 (1994-08-01), Jancic et al.
A.N. Perevprev et al., Production of Paraffins, Moscow Chemistry, 1973, pp. 175-177.

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