February 11, 2013

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 63 patent authorities around the world, and other reputable web sources.  

The following patent record is from the CAplusSM database.


Patent Number: US 8318990
Title: Manufacture of alcohols by dimerization
Inventor(s): Tanaka, Yoshiyuki; Utsunomiya, Masaru
Patent Assignee(s): Mitsubishi Chemical Corporation, Japan
Source: PCT Int. Appl., 23pp. CODEN: PIXXD2
Language: Japanese 


The invention provides a method of producing a dimerized alc. at a high yield and a high selectivity by starting with an alc. having not more than 4 carbon atoms and conducting Guerbet reaction in the presence of a complex containing a transition metal and a base.  Namely, a method of producing an alc. which comprises dimerizing a starting alc. having not more than 4 carbon atoms in an environment under a hydrogen partial pressure of 0.1 MPa or higher.  Thus n-butanol was prepared from ethanol in the presence of ruthenium tris(acetylacetonate), tri-Ph phosphine, and potassium tert-butoxide, in an autoclave under hydrogen pressure.

View the full-text patent here.

Note: Titles and abstracts for patent records in CAplus are routinely enhanced to better describe the claimed invention. In this example, CAS enhanced both the abstract and title using additional information found in the patent. The original title of the U.S. granted patent is Process of producing alcohol. For the CAplus record, this title was enhanced to read Manufacture of alcohols by dimerization.

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