Low cost thermal coupling in ethylene recovery

Details Low cost thermal coupling in ethylene recovery Low cost thermal coupling in ethylene recovery

1995-07-17

1997-10-07

Caldarola, Glenn A.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

208102, 208103, 208104, 208354, 208358, 203 71, 203 74, 203 75, 203 81, 203 82, 203 84, C07C 700, C10G 4922, B01D 300

Patent

active

056750544

ABSTRACT:
The invention is a process for reducing capital and energy costs in ethylene recovery. Moderate pressure processing and thermally coupled fractionation steps are achieved through the use of integrator columns. Ethylene separation from cracked gas originating from ethane through gas oil feeds can now be done with thermodynamically efficient fractionation at capital cost competitive with low efficiency designs. Acetylene hydrogenation may be done before demethanization where desired, and dephlegmation is preferred to accomplish high-efficiency rectification of hydrogen and methane from ethylene. Open loop heat pumps can optionally be incorporated into the ethane/ethylene splitter fractionation step, whose desirability is controlled by optimization of capital and energy costs.

REFERENCES:
patent: 2295256 (1942-09-01), Brugma

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