Energy efficient alkylation process

Details Energy efficient alkylation process Energy efficient alkylation process

1978-07-07

1980-03-11

Crasanakis, George

Chemistry of hydrocarbon compounds

Saturated compound synthesis

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

585910, C07C 354

Patent

active

041928253

ABSTRACT:
In an acid catalyzed alkylation system, a prefractionated reactor hydrocarbon effluent bottoms stream, substantially free of HF, is passed to a propane concentrator in order to provide for a more concentrated and desirable feed for the depropanizer. Due to the highly concentrated propane stream fed to the depropanizer, the size of the depropanizer can be much smaller thereby saving in energy. Hot overhead vapor from the isostripper is also passed in an indirect heat exchange relationship with various feed streams and fractionators in order to supply heat for the preheating of the feed streams and the reboiling of the fractionators. The bottoms fraction of the isostripper can also be passed in an indirect heat exchange relationship with various feed streams and fractionators. The alkylation process, therefore, maximizes the use of available waste heat and reduces the pressure and utilities on the depropanizer thereby saving greatly on energy costs.

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patent: 3925501 (1975-12-01), Putney et al.
patent: 4059649 (1977-11-01), Chapman et al.

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