Recovery and recycle of HF-amine complex in HF alkylation

Details Recovery and recycle of HF-amine complex in HF alkylation Recovery and recycle of HF-amine complex in HF alkylation

1995-09-25

1998-06-09

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By condensation of a paraffin molecule with an olefin-acting...

585719, 585723, 585730, 585802, C07C 258, C07C 256, C07C 700

Patent

active

057637288

ABSTRACT:
An HF-agent complex, such as HF-pyridine complex where the complexing agent is pyridine, is recovered and recycled from a by-product containing stream in an alkylation process using the complex by (a) selectively removing a portion of the HF from the by-product stream to produce an HF-depleted stream having a molar ratio of HF per Lewis base site of the complexing agent of 3:1 to 5:1, (b) separating the resulting HF-depleted stream into a hydrocarbon phase enriched in ASO and an acid phase depleted in ASO and containing a substantial portion of the complex, and (c) recycling the acid phase to the hydrocarbon alkylation step.

REFERENCES:
patent: 3793394 (1974-02-01), Chapman
patent: 3959402 (1976-05-01), Mikulicz et al.
patent: 5073674 (1991-12-01), Olah
patent: 5191150 (1993-03-01), Child et al.
patent: 5237122 (1993-08-01), Eastman et al.

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