METHOD FOR PRODUCING GLYCOL FROM OXIRANE COMPOUND

WIPO Patent Application WO/2013/089271

A1

The purpose of the present invention is to provide a method for producing dipropylene glycol in which the ratio of 1,1'-oxybis-2-propanol is 0.10 to 0.70 and/or tripropylene glycol in which the ratio of 1,1'-[(1-methyl-1,2-ethanediyl)bis(oxy)]bis-2-propanol is 0.10 to 0.70 with high selectivity. The present invention is a method for producing dipropylene glycol in which the ratio of 1,1'-oxybis-2-propanol is 0.10 to 0.70 and/or tripropylene glycol in which the ratio of 1,1'-[(1-methyl-1,2-ethanediyl)bis(oxy)]bis-2-propanol is 0.10 to 0.70, which comprises a reaction step of reacting a reaction material comprising propylene oxide and water in the presence of a catalyst. The method is characterized in that the catalyst contains at least one element selected from the group consisting of vanadium, niobium and tantalum and has a Hammett's acidity function (H) of 9.3 or less (i.e., H ≤ 9.3).

ISHIHARA SHINJIRO (JP)
IKEDA SHOKO (JP)
YOSHII MASAYUKI (JP)
MURATA MAKOTO (JP)

PCT/JP2012/082853

June 20, 2013

December 12, 2012

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SUMITOMO CHEMICAL CO (JP)

C07C41/03; C07C43/13; C07B61/00

JPS5673035A	1981-06-17
JPH1112206A	1999-01-19
JPS60222432A	1985-11-07
JPS5982325A	1984-05-12
JPS5673035A	1981-06-17

See also references of EP 2792663A4
ALTON E. MARTIN: "Kirk-Othmer Encyclopedia of Chemical Technology", 2000, article "Glycols, Propylene Glycols"
TOMINAGA KEII: "Shokubai Kagaku", 1981, TOKYO KAGAKU DOJ IN SHUPPAN, pages: 518 - 519,525-

NAKAYAMA, Tohru et al. (JP)
Nakayama 亨 (JP)

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