The lubricating oil is refined using furfural; why isn’t the flash tower for the extract operated under negative pressure?

2018-12-10View Original

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The lubricating oil is refined using furfural; why isn’t the flash tower for the extract operated under negative pressure?

Reply #22020-02-04

This tower operates under slight negative pressure. The vaporized aldehyde gas is sent to the drying tower; therefore, the pressure in the flash tower is slightly higher than that at the bottom of the drying tower, resulting in a slight negative pressure.

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