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:
May. 21, 2019
Filed:
Jul. 25, 2017
Arkema Inc., King of Prussia, PA (US);
Timothy D. Ligon, Saint Albans, WV (US);
Olan S. Fruchey, Hurricane, WV (US);
Christopher T. Reeves, Durham, NC (US);
Fungau Ho, Charleston, WV (US);
Roger L. Roundy, Rosharon, TX (US);
William G. Etzkorn, Hurricane, WV (US);
Mahmood N. A. Jawaid, Cross Lanes, WV (US);
Patrick M. Wiegand, South Charleston, WV (US);
Arkema Inc., King of Prussia, PA (US);
Abstract
An improved process for the manufacture of technical grade (meth)acrylic acid, e.g., acrylic acid, the process comprising producing a hydrated reaction product from the gas-phase oxidation of at least one (meth)acrylic acid precursor, e.g., propylene, followed by first dehydrating and then concentrating the reaction product, the improvement comprising controlling at least one of the water, acetic acid and (meth)acrylic acid content of the reaction product during the purification of the reaction product using on-line, near IR spectroscopy.