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

C - Chemistry, Metallurgy

07

C

C07C 2/70 (2006.01) C07C 2/20 (2006.01) C07C 9/16 (2006.01) C07C 15/107 (2006.01)

Patent

CA 2147788

An HF-amine complex such as HF-pyridine is recovered and recycled from a by- product containing stream [10] in an alkylation process using the complex as the catalyst system by (a) selectively removing a portion of the HF from the by-product stream [10] to produce an HF-depleted stream [22] containing an HF to complexing agent mole ratio of 3:1 to 5:1, (b) separating the resulting HF-depleted stream [22] into a hydrocarbon phase [26] enriched in ASO and an acid phase [28] depleted in ASO and containing a substantial portion of the complex, and (c) recycling the acid phase [28] to the hydrocarbon alkylation step.

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