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:
Aug. 09, 2005
Filed:
Oct. 15, 2003
Krishnan Viswanathan, Houston, TX (US);
Krishnan Viswanathan, Houston, TX (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glycol containing aldehyde, mixing with the thus separated tripropylene that contains aldehyde an aldehyde controlling additive to form a first individual tripropylene glycol product that contains glycol controlling additive and has an aldehyde content below that required for acrylate grade tripropylene glycol, separating from the remainder of the composition a tripropylene glycol concentrate, adding an aldehyde controlling additive to the concentrate, and separating from the concentrate a second individual tripropylene product that has an aldehyde content below that required for acrylate grade tripropylene glycol and is free of aldehyde controlling additive.