Effluent separation method for aromatic hydrocarbon alkylation p

Details Effluent separation method for aromatic hydrocarbon alkylation p Effluent separation method for aromatic hydrocarbon alkylation p

1988-02-05

1989-12-05

Sneed, H. M. S.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

585470, 585446, 585804, 585802, 208361, 208364, 208365, 208362, 208351, 208350, 208355, C07C 264

Patent

active

048854247

ABSTRACT:
A process for the production of alkylaromatic hydrocarbons uses a light hydrocarbon recycle 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 light hydrocarbon 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: 3254024 (1966-05-01), Huckins
patent: 4051191 (1977-09-01), Ward
patent: 4360405 (1982-11-01), Tsao
patent: 4587370 (1986-05-01), DeGraff
patent: 4695665 (1987-09-01), DeGraff
Chemical Engineering, Mar. 21, 1983 edition, pp. 32-33, Canfield et al., "Improving Cumene Yield Via Selective Catalysis".

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