This was an especially critical application due to the corrosiveness of the material to be treated, which was hydrofluoric acid at concentrations of up to 75%.
The new equipment, manufactured from engineering plastics, replaced old equipment of AºCº lined with PVDF.
Each unit came equipped with internal accessories for the feed and distribution of the acid.
The operating conditions of the absorbers were a maximum pressure of 3.5 bar, and a maximum temparature of 70ºC.
The absorbers receive hydrofluoric acid in concentrations that reach 75% inside the equipment.
The absorbers were of dual composition, using PVDF as a liner and a carbon fibre entrefase to protect the fibreglass from permeation of the acid through the PVDF. The structural reinforcement was of a novolac vinylester resin DERAKANE470/300 based FRP. The internal components were manufactured in PVDF.
Petroquímica Española S.A. (PETRESA) .
PETRESA plant, San Roque,
Year of completion