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:
Jan. 10, 2017
Filed:
Mar. 13, 2014
Dow Global Technologies Llc, Midland, MI (US);
Leonard E. Bogan, Jr., Midland, MI (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
A salt-splitting liquid (SSL) and a process that uses the SSL to 'split' (alkyl)ammonium 3-hydroxypropionate salts into ammonia (or amines) and 3-hydroxypropionic acid (3-HP) that minimizes increases in viscosity and condensation reactions of the 3-HP. Converting (alkyl)ammonium 3-hydroxypropionate in an aqueous mixture to 3-HP includes admixing a polar aprotic organic solvent and an azeotroping solvent with the aqueous mixture. The azeotroping solvent forms an azeotrope mixture with water of the aqueous mixture. The SSL is heated to convert the (alkyl)ammonium 3-hydroxypropionate to 3-HP and ammonia, where heating produces a vapor phase containing at least water, ammonia and the azeotroping solvent. At least a portion of the water and the ammonia is removed from the vapor phase during the heating, and at least a portion of the azeotroping solvent is returned from the vapor phase back to SSL to maintain the azeotrope mixture with the water.