Process for producing propylene glycol

Details Process for producing propylene glycol Process for producing propylene glycol

2008-10-28

2011-11-08

Witherspoon, Sikarl (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

Reexamination Certificate

active

08053608

ABSTRACT:
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.

REFERENCES:
patent: 4199479 (1980-04-01), Wilkes
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patent: 5214219 (1993-05-01), Casale et al.
patent: 2007/0149830 (2007-06-01), Tuck et al.
patent: 57-122941 (1982-07-01), None
International Search Report for PCT/JP2008/069527 mailed Dec. 2, 2008.
Wang et al, Catalysis Letters, Sep. 26, 2007, vol. 117, pp. 62-67.
Park et al, Applied Catalysis A: General, 2003, vol. 253, pp. 249-255.

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