November 28, 2011

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 61 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.


Patent Number: US 8053608
Title: Method for producing propylene glycol
Inventor(s): Kouno, Hiroshi; Ozawa, Shuji; Yoshimura, Naritoshi
Patent Assignee(s): Mitsui Chemicals, Inc., Japan
Source: PCT Int. Appl., 40pp. CODEN: PIXXD2
Language: Japanese


Propylene glycol is prepared by catalytically hydrogenating glycerin in the presence of catalysts containing zinc oxide, silica, and at least 1 of Cu and Cu oxide. Thus, glycerin 24, H2O 6, F 10G (50% Cu oxide, 50% Zn oxide) 1.0, E 35S (Cu oxide 67, silica 27, and a binder 6%) 0.20 g were mixed and hydrogenated to 200 degree C to prepare 86.0% propylene glycol at conversion of glycerin 91.1%.

Please note:  Abstracts and Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention. In this example, CAS enhanced the abstract using additional information found in the patent. The title of the U.S. granted patent is Process for producing propylene glycol. CAS originally indexed the PCT publication WO 2009057584 with the title Method for producing propylene glycol.

View the full-text U.S. patent from USPTO.

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