The UOP/CEPSA process uses a solid, heterogeneous catalyst to produce linear alkylbenzene (LAB) by alkylating benzene with linear olefins made by the UOP Pacol, DeFine…
The INEOS acrylonitrile technology, known as the SOHIO acrylonitrile process, is used in the manufacture of over 95% of the world’s acrylonitrile. INEOS Technologies licenses…
Acrylic acid (AA) is used as feedstock for numerous applications. The Lurgi/Nippon Kayaku combined technology produces estergrade acrylic acid (EAA). Main uses are adhesives, paints…
To produce acetic acid using the process, ACETICA. Methanol and carbon monoxide (CO) are reacted with the carbonylation reaction using a heterogeneous Rh catalyst. Fresh…
Contract maintenance workers often will not replace the tray manways unless the tray manway is adjacent to a tower external manway. They reason that once…
If a tower has a history of tray deck damage due to pressure surge or high liquid level, the mechanical integrity of the trays should…
The downcomer from the bottom tray is submerged in a seal pan (see Fig. 8.3), to preserve its downcomer seal. I always set the horizontal…
Most trays have outlet weirs devoted to maintaining the downcomer seal. But some trays have inlet weirs too, or inlet weirs, but no outlet weirs.…
The bottom edge of the downcomer from the tray above should be 0.25 to 0.5 in below the top edge of the weir of the…
The vertical edges to the downcomers are bolted to bars welded to the vessel wall. These are called, “downcomer bolting bars.” Gaskets are often used…