Process for the production of 4'-isobutylacetophenone

Details Process for the production of 4'-isobutylacetophenone Process for the production of 4'-isobutylacetophenone

1990-10-05

1991-11-26

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568324, C07C 4545

Patent

active

050684485

ABSTRACT:
A continuous process is provided for the production of 4'-isobutylacetophenone (4-IBAP) comprising feeding liquid hydrogen fluoride (HF) and an acetylating agent into an extractor-reactor to form a first, HF-rich phase containing the acetylating agent, feeding isobutylbenzene (IBB) to the extractor-reactor to form a second, IBB-rich phase which is contacted with said first, HF-rich phase in a manner such that the acetylating agent reacts with IBB to form 4-IBAP which is extracted into the first, HF-rich phase, and a light IBB-rich second phase containing the bulk of unreacted IBB, externally recycling said second, IBB-rich phase to the IBB feed point in combination with fresh IBB to make up for IBB consumed in the reaction and that and dissolved in the HF-rich phase, and withdrawing HF-rich phase containing 4-IBAP from the extractor-reactor.

REFERENCES:
patent: 3385886 (1968-05-01), Nicholson et al.
patent: 3403183 (1968-09-01), Dobratz et al.
patent: 4894482 (1990-01-01), Lindley et al.
patent: 4967011 (1990-10-01), Tokura et al.
Baddeley et al., Journal of the Chemical Society, (1956): 4943-4945.

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