Method for controlling a rectification column

US11235260B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Mathias Schweigert · Cologne, DE
• Achim KÜPPER · Leverkusen, DE

Key dates

• Filing date: Aug 1, 2017
• Grant date: Feb 1, 2022
• Expiry date: Dec 10, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D3/4294
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a method of controlling a concentration of a first component of a rectification column for separating a binary mixture of the first component with a second component on the basis of temperature measurements, wherein a control path defined by temperature sensors (T3, T2, T6) arranged in the longitudinal direction of the column is linearized with the aid of an estimated temperature profile, wherein a real temperature profile T*(h), determined by means of the temperature sensors, is approximated by a function T(h) in dependence on a column height h, wherein the column id divided into two sections along the column height h and the function T(h) is defined section by section on the basis, in each case, of a logistical function.