Alkylation unit uses a process which converts the separated gases from
a vapor recovery unit (particularly propane, butane, and sometimes pentane) into
high octane gasoline.
These gases are compressed into a liquid and then passed
through sulfuric acid (the catalyst) causing the separate gases to bond (Figure 2-
The octane gasoline produced by an alkylation unit is piped to a treating
Three to six tall, thin fractionators arranged in a line
One tower may be taller than the others
Spherical gas storage tanks(s) present.
This process is very similar to alkylation.
heat, pressure, and an acid catalyst to combine propane and propane gas, supplied
by a vapor recovery unit, into high octane gasoline inside a reactor.
octane gasoline produced by the polymerization unit is stable and routed to the
treating unit (Figure 2-29).
(Figure 2-36) include:
Five to 10 tall, thin fractionators
One or two pipe furnace(s)
Reactor columns, possibly enclosed in tall, rectangular steel structures or
in buildings; or may be short, thick columns located among the fractionators