Vapor-liquid extractive distillation with dialkyl sulfone/water

Details Vapor-liquid extractive distillation with dialkyl sulfone/water Vapor-liquid extractive distillation with dialkyl sulfone/water

1981-11-20

1983-08-30

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 57, 203 85, 585805, 585807, 585856, B01D 340, C07C 708

Patent

active

044015178

ABSTRACT:
A vapor-liquid extractive distillation process utilizing a dialkyl sulfone containing 4 to 8 carbon atoms per molecule and at least one percent water as the solvent. The process according to this invention is of particular applicability in separating aromatics from nonaromatics in a BTX stream. The solvent system operates particularly well with relatively large amounts of water.

REFERENCES:
patent: 2033942 (1936-03-01), Kurtz
patent: 2357028 (1944-08-01), Shiras et al.
patent: 2407820 (1946-09-01), Durrum
patent: 2831039 (1958-04-01), Nevitt
patent: 2849514 (1958-08-01), Nevitt
patent: 2884360 (1959-04-01), Bloom et al.
patent: 3070518 (1962-12-01), Nelson et al.
patent: 4024028 (1977-05-01), Haskell
patent: 4053369 (1977-10-01), Cines
patent: 4076595 (1978-02-01), Haskell
Weissberger: Techniques of Organic Chemistry, vol. Distillation; 1965, pp. 430, 431 and 457.

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