Method and apparatus for stripping sulfur-containing compounds from hydrocarbon feed stock in hydrorefining of petroleum distillates

A hydrorefining unit for hydrorefining hydrocarbon feed oil including sulfur-containing compounds, comprising:

• a first catalyst layer and a second catalyst layer;
• a holding member positioned between the first catalyst layer and second catalyst layer for temporarily holding a liquid component that flows out from the first catalyst layer, wherein said holding member is a valve tray;
• a hydrogen feed source;
• a hydrogen introduction part, that is connected to the hydrogen feed source, for simultaneously introducing hydrogen from the hydrogen feed source to the liquid component held in the holding member and the second catalyst layer, wherein the hydrogen introduced from the hydrogen introduction part has a first hydrogen gas stream and a second hydrogen gas stream;
• a separation space that is positioned at the bottom of the first catalyst layer for separation of vapor component and liquid component;
• means for adjusting pressure of the separation space and/or a space between the holding member and the second catalyst layer;
• and
• a gas outlet through which the vapor component is discharged from the separation space.

A hydrorefining unit for hydrorefining hydrocarbon feed oil including sulfur-containing compounds, comprising:

• a first catalyst layer and a second catalyst layer;
• a holding member positioned between the first catalyst layer and second catalyst layer for temporarily holding a liquid component that flows out from the first catalyst layer, wherein said holding member is a valve tray;
• a hydrogen feed source;
• a hydrogen introduction part, that is connected to the hydrogen feed source, for simultaneously introducing hydrogen from the hydrogen feed source to the liquid component held in the holding member and the second catalyst layer;
• a separation space that is positioned at the bottom of the first catalyst layer for separation of vapor component and
• liquid component, wherein the separation space and/or a space between the holding member and the second catalyst layer can have its pressure adjusted;
• and
• a gas outlet through which the vapor component is discharged from the separation space.