Mitsui Chemicals, Inc.

Hiroshi Kouno

Shuji Ozawa

Naritoshi Yoshimura

Takashi Nakano

Tadahiro Sunaga

Yoshihiro Yamamoto

Kazumori Kawamura

Takashi Ochiai

Hirofumi Io

Shigeto Shigematsu

Tomoyuki Morita

Propylene glycol is produced by a method of producing propylene glycol, the method including: obtaining propylene glycol by performing catalytic hydrogenation of glycerol in the presence of a catalyst, the catalyst containing zinc oxide and at least one of copper and copper oxide, and the catalyst, after being reduced at 180&#xb0; C. to 230&#xb0; C. in the presence of hydrogen, showing a half width of from 0.4 to 1.1 of a peak having a peak top at a position at which a diffraction angle (2&#x3b8;&#xb1;0.2&#xb0;) is 43.1&#xb0; in an X-ray diffraction pattern obtained using CuK&#x3b1; as a radiation source.

Method of producing propylene glycol

It is an object of the present invention to provide a process for producing propylene glycol from glycerol as a raw material without the necessity for a step of gasifying glycerol. The process for producing propylene glycol of the present invention comprises a step of subjecting glycerol to catalytic hydrogenation in the presence of a catalyst A containing zinc oxide, silica, and at least one of copper and copper oxide.

Process for producing propylene glycol

The present invention is to provide a fluorine-containing polymer having excellent light transmission in the vacuum ultraviolet region of not more than 193 nm, a monomer favorably used for preparing the fluorine-containing polymer, a process for preparing the fluorine-containing polymer, and uses of the fluorine-containing polymer. The fluorine-containing polymer has at least a repeated unit structure represented by the following formula (1) and has an absorption coefficient of not more than 3.0 &#x3bc;mat 157 nm of ultraviolet rays.wherein Rto Rare each fluorine, a fluorine-containing alkyl group of 1 to 20 carbon atoms, or the like; Xis &#x2014;CRR&#x2014;, &#x2014;NR&#x2014; or &#x2014;PR&#x2014; (Rand Rare each fluorine, a fluorine-containing alkyl group of 1 to 20 carbon atoms, hydrogen, &#x2014;O&#x2014;, &#x2014;S&#x2014;, an alkyl group of 1 to 20 carbon atoms, or the like); at least one of Rto Rand Xis fluorine or a fluorine-containing group; and n is 0 or an integer of 1 to 3.

Fluorinated cycloolefin polymers, processes for preparation of fluorinated cycloofefin monomers and polymers thereof, and use of the same

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Ichihara, Japan

Hiroshi Kouno