Total Research & Technology Feluy

Total Petrochemicals Research Feluy

Totalenergies Onetech

Total Petrochemicals France

Jean-Pierre Thoret Bauchet

Renaud Dernoncourt

Gustav Alcuri

Carole Bailly

Michel Laxnier

Michel Lasnier

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.

Cleaning process of a vinyl aromatic compounds distillation unit and processes including such cleaning process

The invention relates to a process for removing red oils deposits formed in an installation comprising the use of a cleaning agent comprising one or more fatty acid esters to dissolve the red oils deposit and to form a mixture comprising the cleaning agent and the dissolved red oils; and removing the mixture comprising the cleaning agent and the dissolved red oils.

Cleaning process to remove red oils deposits in an installation comprising fatty acid esters as cleaning agent and use of fatty acid esters as cleaning agent in such a process

Process to monitor unwanted formation of a polymer, having internal mechanical strain, wherein said formation of polymer generates acoustic emissions due to the sudden break of the polymer, wherein the number of said acoustic emissions increases over time when there is formation of said unwanted polymer formation, wherein said acoustic emissions is detected by a resonant piezo electric transducer having a resonant frequency centred on the second harmonic of said acoustic emission.

Process to mitigate unwanted formation of popcorn polymers using acoustic emission signals

A process to monitor unwanted formation of a polymer having internal mechanical strain is disclosed. The acoustic emission generated by polymer formation is detected by one or more acoustic sensors attached to a piece of equipment.

Process to monitor unwanted formation of a polymer having internal strain by acoustic emission analysis

The present invention is a process for the production of styrene monomer from ethylbenzene comprising the steps of:

Process for cooling the stream leaving an ethylbenzene dehydrogenation reactor

The present invention is a method of reducing the formation of fouling deposits occurring in a caustic scrubber used to remove acid gases comprising: a) providing a caustic scrubber fed with an alkaline aqueous solution comprising essentially one or more of NaOH, KOH or LiOH, b) providing an olefin-containing hydrocarbon stream, contaminated with oxygenated compounds and acid gases, and said oxygenated compounds are capable to make polymeric fouling deposits in the presence of the alkaline solution of the scrubber, c) sending the above hydrocarbon stream to the caustic scrubber to recover an olefin-containing hydrocarbon stream essentially free of acid gases, wherein, d) an efficient amount of a solvent capable to reduce the formation of fouling deposits is introduced in the caustic scrubber and/or in the alkaline solution fed to the scrubber, e) the liquid outlet of the scrubber is sent to means to separate the solvent from the alkaline solution, and wherein the caustic scrubber has several stages with various caustic concentrations, and wherein the solvent injection and removal can be located at each stage.

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Brussels, Belgium

Jean-Pierre Thoret Bauchet