Reformate splitter

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). 

The C8+ fraction from the bottom of the reformate splitter is charged to a xylene splitter column (10). The bottom of the xylene splitter column is sent to the o-xylene column (14) to separate high-purity o-xylene product and the bottoms are sent to the heavy aromatics column (7). 

Description GTC s GT-BenZap process features a reliable traditional design paired with a proven active hydrogenation catalyst. The process consists of hydrotreating a narrow-cut Cg fraction, which is separated from the full-range reformate to saturate the benzene component into cyclohexane. The reformate is first fed to a reformate splitter, where the Cg heart cut is separated as a side-draw fraction while the C/ cut and the Cg- light fraction are removed as bottom and top products of the column. 

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... 

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). 

However, the most economical and octane effective route to reduce benzene is to eliminate benzene and benzene precursors from the naphtha reformer feed by pre-fractionation in an up-stream splitter and then send these precursors to an isomerization unit. With this approach, benzene will be saturated and isomerised to a mixture of higher octane saturated cyclics. Depending on the feed benzene content, various solutions can be applied to handle the heat load from the saturation of benzene. These heat management solutions entail saturation of the benzene in the iso-... 

The light reformate is mixed with the C/ cut from the splitter column and together form the full-range reformate, which is low in benzene. GTC also offers a modular construction option and the possibility to reuse existing equipment. 

A key part of this work in the development of fractionation sections for the reformate and A6 splitter. We compare the model predictions of the temperature profiles of the LPG column DA301 and reformate separator DA302. We note good agreement with plant measurements. 

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