Method of column control

US11225444B2 · kind B2 · utility

Assignee

• SABIC GLOBAL TECHNOLOGIES B.V. · NL

Inventors

• Abdullah Saad Al-Dughaiter · Riyadh, SA
• Shahid Azam · Riyadh, SA
• Abdulmajeed Mohammed Al-Hamdan · Riyadh, SA
• Dafer Mubarak Alshahrani · Riyadh, SA
• Ralf Noack · Dresden, DE
• Tobias Meier · Dresden, DE
• Gabriel Waurick · Dresden, DE
• Heinz Bölt · Wolfratshausen, DE
• Andreas Meiswinkel · Munich, DE
• Wolfgang Muller · Königsfeld, DE
• Anina Wöhl · Munich, DE
• Hans-Jorge Zander · Munich, DE

Key dates

• Filing date: Dec 19, 2017
• Grant date: Jan 18, 2022
• Expiry date: Jun 19, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C11/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method of column control includes: passing a feed stream and a make-up stream through a column; withdrawing an overhead fraction from the column; purging at least a portion of the overhead fraction; cooling at least a portion of the overhead fraction in a heat exchanger and passing it through a reflux drum; withdrawing a purge stream and a distillate stream from the reflux drum, wherein the distillate stream has a constant flow rate; recycling at least a portion of the distillate stream back to the column; and passing at least a portion of the distillate stream to a downstream process.