Yusuf I Sulub

US Patent:

20190315922, Oct 17, 2019

Filed:

Apr 12, 2019

Appl. No.:

16/383209

Inventors:

- BERGEN OP ZOOM, NL
YUSUF SULUB - Newburgh IN, US
CESAR GONZALEZ SERRANO - Mt. Vernon IN, US
ROY RAY ODLE - Mt. Vernon IN, US

International Classification:

C08G 73/10

Abstract:

A method of making a polyetherimide including: setting a target range for the anhydride-amine stoichiometry in a reaction mixture; combining a solvent, a diamine, a bis(ether anhydride), and an optional end capping agent to form the reaction mixture wherein the reaction mixture has a polyamic acid content; analyzing the amine and anhydride end group content of the reaction mixture using near infrared vibrational spectroscopy; calculating the anhydride-amine stoichiometry; comparing the calculated anhydride-amine stoichiometry to the target stoichiometry, and, when necessary, adjusting the concentration of bis(ether anhydride) or diamine based on the comparison of the calculated anhydride-amine stoichiometry to the target stoichiometry.

US Patent:

20150251131, Sep 10, 2015

Filed:

May 27, 2015

Appl. No.:

14/722429

Inventors:

- Bergen op Zoom, NL
Yusuf Sulub - Newburgh IN, US
Zhensheng Ding - Mt. Vernon IN, US

International Classification:

B01D 53/14
G01N 21/3577

Abstract:

Disclosed herein are processes, apparatuses, and systems for monitoring and/or controlling caustic concentrations in caustic scrubbers. In various aspects, the processes, apparatuses, and systems comprise a real-time online method for measuring the concentration of caustic in process scrubbers wherein a probe is coupled to a spectrometer; collecting absorption data with wavelength range from about 1000 to about 2000 nm. In a further aspect, this technique tracks the use and recharge of caustic in process scrubbers. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.