Title:
プロセスオイル及びその製造方法
Document Type and Number:
Japanese Patent JP4037515
Kind Code:
B2
Abstract:
The processing oil contains polycyclic aromatic hydrocarbon, which is a substance known to be toxic to the human body, in an amount of less than 3 wt.% and an aromatic hydrocarbon in an amount of 25 wt.% or more, and has a kinematic viscosity at 100 DEG C of 10-30 mm<2>/s, a density of 0.870-970 g/cm<3>, and a 5 vol.% recovery temperature of 370-530 DEG C. The processing oil exhibits excellent performance which has conventionally been obtained. The processing oil can be produced by a method in which oil mixture comprising an extract obtained through extraction from mineral oil by use of a polar solvent in an amount of 40-97 vol.% and lubricating base oil in an amount of 3-60 vol.% is subjected to extraction treatment by use of a polar solvent.
Inventors:
Takasaki Masaki
Tanaka Akira
Tanaka Akira
Application Number:
JP10719498A
Publication Date:
January 23, 2008
Filing Date:
April 17, 1998
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
C10G21/12; C10M177/00; C08L21/00; C10G21/00; C10G21/16; C10G53/06; C10N20/00
Domestic Patent References:
| JP11080751A | ||||
| JP11246709A | ||||
| JP2000080208A | ||||
| JP6505524A |
Foreign References:
| FR2685705A1 | ||||
| WO1997035462A1 | ||||
| EP0417908A1 |
Attorney, Agent or Firm:
Tamotsu Otani
Masamichi Tohei
Masamichi Tohei