Title:
プロピレンの過酸化水素とのエポキシ化反応により得られるプロピレンオキシドの精製
Document Type and Number:
Japanese Patent JP2006520821
Kind Code:
A
Abstract:
The present invention relates to a process of separating a purified propylene oxide from a crude epoxidation product which is preferably produced in an epoxidation reaction of propylene with hydrogen peroxide. The process involves removing bulk water, bulk methanol, and unreacted propylene from the crude epoxidation product and thereafter subjecting the resulting propylene oxide product to extractive distillation with water as an extraction solvent. Under distillation conditions, including a bottoms temperature of greater than about 55°C and less than about 75°C, an overhead or side-cut distillate stream containing a purified propylene oxide is obtained with low yield loss of propylene oxide to propylene glycol heavies. The purified propylene oxide can be further purified in a finishing distillation to obtain propylene oxide meeting commercial grade purity requirments.
Inventors:
Patrasque, Renate
Astori, Sabrina
Bidenbach, Mainorf M.
Astori, Sabrina
Bidenbach, Mainorf M.
Application Number:
JP2006509058A
Publication Date:
September 14, 2006
Filing Date:
March 04, 2004
Export Citation:
Assignee:
Dow Global Technologies Incorporated
International Classes:
C07D301/32; C07C27/12; C07C27/28; C07C31/20; C07D303/04
Domestic Patent References:
| JP2001514258A | 2001-09-11 | |||
| JPH0597832A | 1993-04-20 | |||
| JPS5430106A | 1979-03-06 | |||
| JP2001514258A | 2001-09-11 | |||
| JPH0597832A | 1993-04-20 | |||
| JPS5430106A | 1979-03-06 |
Foreign References:
| WO2001057010A1 | 2001-08-09 | |||
| WO2001057010A1 | 2001-08-09 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Masaya Nishiyama
Takashi Ishida
Tetsuji Koga
Masaya Nishiyama