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AssigneeShell Oil Company
InventorsDionysius Jacobus Maria DE VLIEGER, Pieter HUIZENGA, Munro MACKAY, Lucas Petrus Simon KEYZER, Duraisamy MUTHUSAMY
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The invention provides a shut down method for a process for the preparation of glycols from a starting material comprising one or more saccharides in the presence 5 of hydrogen and a catalyst system comprising one or more retro-aldol catalysts comprising tungsten and one or more catalytic species suitable for hydrogenation in a reactor, said method comprising removing the one or more retro-aldol catalysts from the reactor whilst also in the presence of one or more agents suitable to suppress tungsten precipitation.
A shut-down method for a process for the preparation of glycols from a stream comprising one or more saccharides in the presence of hydrogen and a catalyst system comprising one or more retro-aldol catalysts comprising tungsten and one or more catalytic species suitable for hydrogenation in a reactor, said method comprising removing the one or more retro-aldol catalysts from the reactor whilst also in the presence of one or more agents suitable to suppress tungsten precipitation.
A shutdown process for the preparation of monoethylene glycol from a stream comprising one or more saccharides in the presence of hydrogen and a catalyst system comprising one or more tungsten based retro-aldol catalysts in a reactor comprising one or more catalytic species suitable for hydrogenation, said process comprising:
Dependencies are inferred from the claim text.