Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By condensation of entire molecules or entire hydrocarbyl...
Patent
1990-09-10
1992-04-14
Myers, Helane E.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By condensation of entire molecules or entire hydrocarbyl...
585446, 585804, 585802, 208361, 208364, 208365, 208362, 208350, 208351, 208355, C07C 264
Patent
active
051050412
ABSTRACT:
A process for the production of alkylaromatic hydrocarbons uses a working fluid to reduce the costs of separating an unreacted aromatic feed substrate from aromatic hydrocarbon products. Unreacted aromatic substrate is combined with a light hydrocarbon, such as propane, to form a combined effluent stream. The combined effluent stream enters a flash separator where unreacted aromatic substrate is lifted overhead with the light hydrocarbon while heavier aromatic products are recovered below. The aromatic substrate and light hydrocarbon are easily separated in a simple separation zone. Lifting the aromatic substrate with the working fluid reduces the volume of aromatic substrate that remains with the aromatic product so that the more energy intensive separation of the aromatic substrate and aromatic product is performed on a reduced volume of material.
REFERENCES:
patent: 4587370 (1986-05-01), DeGraff
patent: 4695665 (1987-09-01), DeGraff
patent: 4885424 (1989-12-01), Ferk et al.
Danfield et al, "Improving Cumem Yield Via Selective Catalysis," Chem. Eng. Mar. 21, 1983 edition, pp. 32-33.
Ferk Don L.
Haun Edward C.
Schmelzer Eugene
McBride Thomas K.
Myers Helane E.
Tolomei John G.
UOP
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