Steven A Donen

US Patent:

20120035376, Feb 9, 2012

Filed:

Aug 3, 2011

Appl. No.:

13/197593

Inventors:

Brian D. Mullen - Delano MN, US
Marc D. Scholten - Saint Paul MN, US
Andrew J. Louwagie - Golden Valley MN, US
Steven A. Donen - Chanhassen MN, US
Feng Jing - Snellville GA, US
Vivek Badarinarayana - St. Louis Park MN, US

Assignee:

SEGETIS, INC. - Golden Valley MN

International Classification:

C07D 317/30

US Classification:

549205, 549454

Abstract:

A method for producing a product that comprises glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate comprises reacting either glycerol or propylene glycol with ethyl levulinate in the presence of a homogenous or heterogeneous catalyst system in a reactor system. The ethyl levulinate and either glycerol or propylene glycol are heated to remove water, polyol, and excess ethyl levulinate. The excess ethyl levulinate and polyol is recycled back to the reactor. The product is distilled in a specific fashion and optionally treated by means of a stabilizing agent or acid species removal bed, to obtain a composition comprising glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate wherein the composition comprises less than or equal to about 2 wt % contaminants.

US Patent:

20150080585, Mar 19, 2015

Filed:

Nov 21, 2014

Appl. No.:

14/550222

Inventors:

- Golden Valley MN, US
MARC D. SCHOLTEN - SAINT PAUL MN, US
ANDREW J. LOUWAGIE - GOLDEN VALLEY MN, US
STEVEN A. DONEN - CHANHASSEN MN, US
FENG JING - SNELLVILE GA, US
VIVEK BADARINARAYANA - ST. LOUIS PARK MN, US

International Classification:

C07D 317/30

US Classification:

549205, 549454

Abstract:

A method for producing a product that comprises glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate comprises reacting either glycerol or propylene glycol with ethyl levulinate in the presence of a homogenous or heterogeneous catalyst system in a reactor system. The ethyl levulinate and either glycerol or propylene glycol are heated to remove water, polyol, and excess ethyl levulinate. The excess ethyl levulinate and polyol is recycled back to the reactor. The product is distilled in a specific fashion and optionally treated by means of a stabilizing agent or acid species removal bed, to obtain a composition comprising glycerol ketal of ethyl levulinate or propylene glycol ketal of ethyl levulinate wherein the composition comprises less than or equal to about 2 wt % contaminants.