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:
Oct. 09, 2001
Filed:
Jul. 06, 1998
Robert N. Hunt, Steubenville, OH (US);
Gary F. Allen, New Martinsville, WV (US);
Julie A. Jackson, Houston, TX (US);
Peter Scharein, Baytown, TX (US);
Peter J. Ryan, Leverkusen, DE;
Donald Macnaughton, Jr., New Martinsville, WV (US);
Klaus Sommer, Pittsburgh, PA (US);
Larry E. Philyaw, Seabrook, TX (US);
Bayer Corporation, Pittsburgh, PA (US);
Abstract
An in-line spectrometric method for determining the distillation residue content in an opaque, dark-colored mixture containing an isocyanate and tar-like materials (residue) during the isocyanate production process. A probe capable of directing light at wavelengths of from 1050 to 2150 nm is inserted in a stream of the residue-containing mixture and light is transmitted through the stream. Light absorption data is collected and a near-infrared spectrum is generated. The residue content is then determined using a chemometric model. Knowledge of the residue content makes it possible to control and optimize the distillation process.