A CONTINUOUSLY OPERATED DISTILLATTVE PURIFICATION OF 1,2-PROPYLENE GLYCOL FORMED IN THE COPRODUCT-FREE SYNTHESIS OF PROPYLENE OXIDE
Application 47/CHENP/2005 published 2007-03-30, filed 2005-01-24
A continuously operated process for the purification by distillation of the 1,2- propylene glycol formed as by-product in the synthesis of propylene oxide, wherein 1,2.propylene glycol is isolated directly from a wastewater stream obtained in the synthesis of propylene oxide and said wastewater stream containing the 1,2-propylene glycol is separated in a dividing wall colunm into low-, intermediate- and high.boiling fractions and the 1,2- propylene glycol is taken off as intermediate boiler at the side offiake of the column
Applicant
1)BASF AKTIENGESELLSCHAFT
:D-67056 Ludwigshafen Germany
Inventor
1)BASSLER, Peter 2)GOBBEL, Hans-Georg 3)TELES, Joaquim, Henrique 4)RUDOLF, Peter No of Pages : 26 No of Claims : 10
International Info
Classification: B01D 3/14
Publication Number: WO/04/009571
Application Date: 2003-07-22
Priority Information
102 33 382.3 Germany 2002-07-23