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:
May. 26, 2026
Filed:
Jul. 04, 2022
Johnson Matthey Davy Technologies Limited, London, GB;
Paul Gordon, Stockton-on-Tees Cleveland, GB;
Maria Del Amo Lopez, London, GB;
Graham Reed, London, GB;
Michael Winter, London, GB;
Johnson Matthey Davy Technologies Limited, London, GB;
Abstract
A process for separating a Cs or C6 alkanediol from a crude product stream comprising the Cs or C6 alkanediol, light contaminants and heavy contaminants comprising one or more of: a C 10 or C 12 linear ester, or a C 10 or C 12 cyclic acetal or ketal is disclosed. The process comprises feeding the crude product stream to a separation system comprising a first distillation zone, to which the crude product stream is fed and from which the heavy contaminants are removed in a heavies stream taken as a bottom stream, and a second distillation zone, in which the Cs or C6 alkanediol is separated from a reaction product, comprising one or more of: a Cs or C6 cyclic ester, or a Cs or C6 aldehyde, formed in the first distillation zone and from which the Cs or C6 alkanediol is withdrawn in a refined product stream.