Debutanizer reforming

The over-all material balance, prepared for the test period on the combined operation of the thermal reformer and the polymerization unit, appears in Table II. It is based on the streams actually fed and produced. Table III shows the debutanized reformate and debutanized polymer streams separately and as a combined stream. Laboratory inspections of the debutanized reformate and of the debutanized reformate plus polymer blend are presented in Table I. 

Calculated RON values corresponded to engine values of debutanized reformate samples (25 samples) with a standard deviation of 0.55 RON units, which is close to the accuracy of engine measurements. By carrying out a number of repeated test runs, the reproducibility taken as the standard deviation for the measured reformate and hydrogen yields were determined as 0.25 and 0.02 wt%, respectively, and 0.25 units for RON. In order to achieve this a detailed calibration of the GC system was carried out, and the reactor thermocouples, the hydrogen mass flow controllers and naphtha feed pumps were thoroughly calibrated between each test run. 

Ci and lighter gas Debutanized polymer gasoline Debutanized thermal reformate Residuum Product recovery... 

Figure 2. Comparison of F-2 (Motor Method) Octane Numbers of Debutanized Gasolines from Platforming and Thermal Reforming of Pennsylvania Straight-Run Gasoline...

The octane numbers of the debutanized thermal reformate, observed yield of which... 

Similarly, the measured octane numbers of the debutanized blend of thermal reformate with polymer are plotted in Figures 1 and 2 at the observed yield of 76.2 volume % for the debutanized blend. 

F-2 CLEAR OCTANE NO. OF DEBUTANIZED GASOLINE Figure 8. Lead Response (Motor Method) of Platformate and Thermal Reformate from Mid-continent Naphtha... 

Figure 11. Hydrocarbon-Type Content of Debutan-ized Pennsylvania Straight-Run Gasoline, Platformate, and Thermal Reformate...

The product coming out of the reactor consists of excess hydrogen and a reformate rich in aromatics. Typically the dehydrogenation of naphthenes approaches 100%. From 0% to 70% of the paraffins are dehydrocyclized. The liquid product from the separator goes to a stabilizer where light hydrocarbons are removed and sent to a debutanizer. The debutanized platformate is then sent to a splitter where Cg and C9 aromatics are removed. The platformate splitter overhead, consisting of benzene, toluene, and nonaromatics, is then solvent extracted (46). 

The reformate produced in the OCR Platforming unit is sent to a debutanizer column, which strips off the light ends. The debutanizer bottoms are sent to a reformate splitter (3). The C7 fraction from the overhead of the reformate splitter is sent to a Sulfolane unit (4). The C8+ fraction from the bottom of the reformate splitter is sent to a xylene fractionation section. The Sulfolane unit extracts the aromatics and then individual high-purity benzene and toluene products are recovered in a BT fractionation section (5 6). 

Reformate Splitter (Debutanizer) 1. Reflux ratio 2. Overhead (or bottom) draw rate 3. Control stage temperature 1. Reflux ratio 2. Mole purity of C5 in the overhead 3. Control stage temperature... 

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