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:
Apr. 30, 2002
Filed:
Nov. 18, 1999
Werner Hinz, Grosse Ile, MI (US);
Edward Michael Dexheimer, Grosse Ile, MI (US);
BASF Corporation, Mt. Olive, NJ (US);
Abstract
A continuous process for the formation of sucrose based polyols is disclosed. The process comprises the steps of continuously forming an aqueous sucrose solution which is continuously combined with a catalyst and an alkylene oxide and flowed through a first spiral reaction tube. The alkylene oxide substantially completely reacting with the aqueous sucrose solution occurs to form a pre-polymer reaction product in the first spiral reaction tube. The pre-polymer reaction product is continuously flowed from the first reaction tube and unreacted water from the pre-polymer reaction product is removed. The water stripped pre-polymer reaction product is continuously flowed through a second spiral reaction tube and additional alkylene oxide is continuously added to the second spiral reaction tube. The alkylene oxide reacts with the pre-polymer reaction product in the second spiral reaction tube to form a polyol. The polyol is flowed through additional spiral reaction tubes with addition of alkylene oxide and optionally additional catalyst to each of the additional spiral reaction tubes, thus forming a polyol.