CLEANING PROCESS OF A VINYL AROMATIC COMPOUNDS DISTILLATION UNIT AND PROCESSES INCLUDING SUCH CLEANING PROCESS

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...

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Bibliographic Details
Main Authors PELATI, Joe, THORET BAUCHET, Jean-Pierre
Format Patent
LanguageEnglish
French
Published 31.08.2023
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Summary: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. La divulgation concerne un procédé de nettoyage d'une unité de distillation de composés aromatiques vinyliques, l'unité de distillation de composés aromatiques vinyliques comprenant une ou plusieurs colonnes de distillation, le procédé comprenant une étape de nettoyage d'une ou de plusieurs colonnes de distillation suivie d'une étape de passivation d'au moins une colonne de distillation, un flux comprenant un mélange de passivation étant passé à travers au moins une colonne de distillation dans des conditions de passivation comprenant une température d'au moins 90 °C, le mélange de passivation comprenant un composant A qui est un ou plusieurs inhibiteurs de polymérisation ; et un composant B choisi parmi la vapeur et/ou un ou plusieurs hydrocarbures dépourvus de groupe vinyle. La divulgation concerne également le procédé de purification et de production d'un ou de plusieurs composés aromatiques vinyliques qui comprennent ledit procédé de nettoyage.
Bibliography:Application Number: WO2023EP54298