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:
Jun. 03, 2025
Filed:
Feb. 21, 2023
Totalenergies Onetech, Courbevoie, FR;
Jean-Pierre Thoret Bauchet, Brussels, BE;
TOTALENERGIES ONETECH, Courbevoie, FR;
Abstract
The disclosure relates to a cleaning process of a vinyl aromatic compounds distillation unit wherein the vinyl aromatic compounds distillation unit comprises one or more distillation columns, the process comprises a step of cleaning one or more distillation columns followed by a step of passivation of at least one distillation column wherein a flux comprising a passivation mixture is passed through at least one distillation column under passivation conditions comprising a temperature of at least 90° C., wherein the passivation mixture comprises a component A being one or more polymerisation inhibitors; and a component B selected from steam and/or one or more hydrocarbons devoid of vinyl group. The disclosure also relates to the process of purification and of production of one or more vinyl aromatic compounds that include the said cleaning process.