The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 2000
Filed:
Feb. 24, 1999
Raghunath Vitthal Chaudhari, Maharashtra, IN;
Manisha Madhukar Telkar, Maharashtra, IN;
Chandrashekhar Vasant Rode, Maharashtra, IN;
Council of Scientific and Industrial Resesearch, Rafi Marg New Delhi, IN;
Abstract
The present invention provides an improved process for the preparation of 2-phenyl ethanol [CAS 60-12-8] by catalytic hydrogenation of styrene oxide [CAS 96-09-3] with supported platinum group metal catalysts in the presence of an organic as well as inorganic base as a promoter, using alcohol as a solvent. The reaction is carried out at a temperature ranging between 40-120.degree. C. and the hydrogen pressure of 50-800 psig, under stirring conditions. After the reaction is complete, the reaction mixture is cooled to room temperature, catalyst is separated from the product by conventional methods like filtration. This invention is particularly useful as an alternative to the conventional methods like Grignard synthesis and Friedel-Craft alkylation for manufacture of 2-phenyl ethanol. This invention eliminates the handling of dangerous diethyl ether solvent, ethylene oxide and the use of AlCl.sub.3 which poses serious effluent problems. The proposed invention produces 2-phenyl ethanol selectively with highest purity via the catalytic hydrogenation of styrene oxide.