Real-time online determination of caustic in process scrubbers using near infrared spectroscopy and chemometrics

摘要

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.

主权项

1. A monitoring process comprising the steps of:
(a) providing a spectroscopy probe coupled to a caustic scrubber; (b) measuring the near-infrared absorbance in the scrubber; and (c) introducing caustic into the scrubber to maintain a concentration range of from about 5% to about 15%, wherein the caustic is introduced in response to the measured absorbance in accordance with a pre-determined set point value.