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:
Jan. 28, 2014
Filed:
Apr. 15, 2011
Noel C. Hallinan, Loveland, OH (US);
Brian Salisbury, Oxford, PA (US);
Wayne Joseph Brtko, Glen Mills, PA (US);
Noel C. Hallinan, Loveland, OH (US);
Brian Salisbury, Oxford, PA (US);
Wayne Joseph Brtko, Glen Mills, PA (US);
Lyondell Chemical Technology, L.P., Houston, TX (US);
Abstract
The disclosure relates to a process in which methanol is carbonylated in a reaction zone in the presence of a catalyst to obtain a reaction mixture (A) comprising acetic acid, hydrogen iodide, methyl iodide, water and the catalyst. At least a part of the reaction mixture (A) is separated in a flash zone to obtain a vapor stream (B) which comprises acetic acid, hydrogen iodide, methyl iodide and water. The vapor stream (B) is withdrawn from the flash zone, and the withdrawn vapor stream is then reacted with at least one alkylimidazole to obtain a composition (C) from which acetic acid is separated. By reacting the vapor stream (B) with the alkylimidazole at least parts of the hydrogen iodide and methyl iodide contained in (B) are bound in form of iodide salts which significantly facilitates the separation of crude acetic acid from the vapor stream (B) and the further purification of the crude acetic acid.